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<h3>

Simon Peyton Jones pushed to branch wip/T18891

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4">727264bd</a></strong>

<div>

<span>by Simon Peyton Jones</span>

<i>at 2020-12-04T12:43:10+00:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix kind inference for data types. Again.

This patch fixes several aspects of kind inference for data type

declarations, especially data /instance/ declarations

Specifically

1. In kcConDecls/kcConDecl make it clear that the tc_res_kind argument

   is only used in the H98 case; and in that case there is no result

   kind signature; and hence no need for the disgusting splitPiTys in

   kcConDecls (now thankfully gone).

   The GADT case is a bit different to before, and much nicer.

   This is what fixes #18891.

   See Note [kcConDecls: kind-checking data type decls]

2. Do not look at the constructor decls of a data/newtype instance

   in tcDataFamInstanceHeader. See GHC.Tc.TyCl.Instance

   Note [Kind inference for data family instances].  This was a

   new realisation that arose when doing (1)

   This causes a few knock-on effects in the tests suite, because

   we require more information than before in the instance /header/.

   New user-manual material about this in "Kind inference in data type

   declarations" and "Kind inference for data/newtype instance

   declarations".

3. Minor improvement in kcTyClDecl, combining GADT and H98 cases

4. Fix #14111 and #8707 by allowing the header of a data instance

   to affect kind inferece for the the data constructor signatures;

   as described at length in Note [GADT return types] in GHC.Tc.TyCl

   This led to a modest refactoring of the arguments (and argument

   order) of tcConDecl/tcConDecls.

5. Fix #19000 by inverting the sense of the test in new_locs

   in GHC.Tc.Solver.Canonical.canDecomposableTyConAppOK.

</pre>

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<h4>30 changed files:</h4>

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<a href="#576dff4e64fa03683ffc5dcdd58284acdd70bc8e">

compiler/GHC/Hs/Extension.hs

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<a href="#9355bef855426caf5f526925edf351b20f9a86c4">

compiler/GHC/Tc/Gen/HsType.hs

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compiler/GHC/Tc/Solver/Canonical.hs

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compiler/GHC/Tc/TyCl.hs

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compiler/GHC/Tc/TyCl/Instance.hs

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docs/users_guide/9.2.1-notes.rst

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docs/users_guide/exts/poly_kinds.rst

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<h4>Changes:</h4>

<li id="576dff4e64fa03683ffc5dcdd58284acdd70bc8e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#576dff4e64fa03683ffc5dcdd58284acdd70bc8e"><strong>compiler/GHC/Hs/Extension.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -253,9 +253,9 @@ sure that any uses of it as a field are strict.</td>

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<pre style="margin: 0;"> <span id="LC253" class="line" lang="haskell"><span class="cd">-- | Used as a data type index for the hsSyn AST; also serves</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- as a singleton type for Pass</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC255" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="p">(</span><span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Pass</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC256" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GhcP<span class="idiff left right">s</span></span></span>

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<pre style="margin: 0;">-<span id="LC257" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ghc<span class="idiff left right">Rn</span></span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC258" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ghc<span class="idiff left right">Tc</span></span></span>

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<pre style="margin: 0;">+<span id="LC256" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">GhcP<span class="idiff left">ass</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">'Parsed</span></span></span>

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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ghc<span class="idiff left">Pass</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">'Renamed</span></span></span>

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<pre style="margin: 0;">+<span id="LC258" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ghc<span class="idiff left">Pass</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">'Typechecked</span></span></span>

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259

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259

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell"></span>

</pre>

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260

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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This really should never be entered, but the data-deriving machinery</span></span>

</pre>

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261

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261

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<pre style="margin: 0;"> <span id="LC261" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- needs the instance to exist.</span></span>

</pre>

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<br>

</li>

<li id="9355bef855426caf5f526925edf351b20f9a86c4">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#9355bef855426caf5f526925edf351b20f9a86c4"><strong>compiler/GHC/Tc/Gen/HsType.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<pre style="margin: 0;"> <span id="LC2986" class="line" lang="haskell">                         <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsOuterSigTyVarBndrs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">,</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2987" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Do not push level; do not make implication constraint; use Tvs</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2988" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Two major clients of this "bind-only" path are:</span></span>

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<pre style="margin: 0;">-<span id="LC2989" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    Note [<span class="idiff left right">Kind-checking for GADTs] in </span>TyCl</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC2989" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    Note [<span class="idiff left right">Using TyVarTvs for kind-checking GADTs] in GHC.Tc.</span>TyCl</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2990" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    Note [Checking partial type signatures]</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2991" class="line" lang="haskell"><span class="n" style="color: #333;">bindOuterSigTKBndrs_Tv_M</span> <span class="n" style="color: #333;">mode</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2992" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bindOuterTKBndrsX</span> <span class="p">(</span><span class="n" style="color: #333;">smVanilla</span> <span class="p">{</span> <span class="n" style="color: #333;">sm_clone</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">sm_tvtv</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3299,8 +3299,8 @@ When we /must/ clone.</td>

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<pre style="margin: 0;"> <span id="LC3299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  When kind-checking T, we give (a :: kappa1). Then:</span></span>

</pre>

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3300

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3300

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<pre style="margin: 0;"> <span id="LC3300" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3301

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<td class="diff-line-num new_line" data-linenumber="3301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3301

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<pre style="margin: 0;"> <span id="LC3301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - In kcConDecl we make a TyVarTv unification variable kappa2 for k2</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC3302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (as described in Note [<span class="idiff left right">Kind-checking for GADTs], even though this</span></span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC3303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    example is an existential)</span></span>

</pre>

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3302

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<pre style="margin: 0;">+<span id="LC3302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (as described in Note [<span class="idiff left right">Using TyVarTvs for kind-checking GADTs],</span></span></span>

</pre>

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3303

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<pre style="margin: 0;">+<span id="LC3303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    e<span class="idiff left right">ven though this e</span>xample is an existential)</span></span>

</pre>

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3304

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<pre style="margin: 0;"> <span id="LC3304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - So we get (b :: kappa2) via bindExplicitTKBndrs_Tv</span></span>

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3305

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<pre style="margin: 0;"> <span id="LC3305" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - We end up unifying kappa1 := kappa2, because of the (SameKind a b)</span></span>

</pre>

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3306

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<pre style="margin: 0;"> <span id="LC3306" class="line" lang="haskell"></span>

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<li id="f018e77421f495c6f75733fee4a511cfe57bebe8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#f018e77421f495c6f75733fee4a511cfe57bebe8"><strong>compiler/GHC/Tc/Solver/Canonical.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1885" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1885,7 +1885,7 @@ canDecomposableTyConAppOK ev eq_rel tc tys1 tys2</td>

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<pre style="margin: 0;"> <span id="LC1885" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tyConBinders</span> <span class="n" style="color: #333;">tc</span></span>

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1886

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<pre style="margin: 0;"> <span id="LC1886" class="line" lang="haskell">               <span class="p">,</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">new_loc0</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNamedTyConBinder</span> <span class="n" style="color: #333;">bndr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">toKindLoc</span> <span class="n" style="color: #333;">loc</span></span>

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<pre style="margin: 0;"> <span id="LC1887" class="line" lang="haskell">                              <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>               <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">loc</span></span>

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<pre style="margin: 0;">-<span id="LC1888" class="line" lang="haskell">                     <span class="n" style="color: #333;">new_loc</span>  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is<span class="idiff left right">V</span>isibleTyConBinder</span> <span class="n" style="color: #333;">bndr</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1888" class="line" lang="haskell">                     <span class="n" style="color: #333;">new_loc</span>  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">is<span class="idiff left right">Inv</span>isibleTyConBinder</span> <span class="n" style="color: #333;">bndr</span></span>

</pre>

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1889

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<pre style="margin: 0;"> <span id="LC1889" class="line" lang="haskell">                              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">updateCtLocOrigin</span> <span class="n" style="color: #333;">new_loc0</span> <span class="n" style="color: #333;">toInvisibleOrigin</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1890" class="line" lang="haskell">                              <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

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<pre style="margin: 0;"> <span id="LC1891" class="line" lang="haskell">                              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_loc0</span> <span class="p">]</span></span>

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<li id="83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca"><strong>compiler/GHC/Tc/TyCl.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -17,7 +17,8 @@ module GHC.Tc.TyCl (</td>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Functions used by GHC.Tc.TyCl.Instance to check</span></span>

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- data/type family instance declarations</span></span>

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<pre style="margin: 0;">-<span id="LC20" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">kcConDecls</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcConDecls</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">dataDeclChecks</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">checkValidTyCon</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">kcConDecls</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcConDecls</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">DataDeclInfo</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">dataDeclChecks</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">checkValidTyCon</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcFamTyPats</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcTyFamInstEqn</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tcAddTyFamInstCtxt</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcMkDataFamInstCtxt</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcAddDataFamInstCtxt</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">unravelFamInstPats</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">addConsistencyConstraints</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="38" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="39" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -38,7 +39,7 @@ import GHC.Tc.Solver( pushLevelAndSolveEqualities, pushLevelAndSolveEqualitiesX</td>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell">                    <span class="p">,</span> <span class="n" style="color: #333;">reportUnsolvedEqualities</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Monad</span></span>

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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Env</span></span>

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<pre style="margin: 0;">-<span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Unify</span><span class="p">(</span> <span class="n" style="color: #333;">emitResidualTvConstraint</span> <span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Unify</span><span class="p">(</span> <span class="n" style="color: #333;"><span class="idiff left">unifyType</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">emitResidualTvConstraint</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types.Constraint</span><span class="p">(</span> <span class="n" style="color: #333;">emptyWC</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Validity</span></span>

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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Zonk</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -130,7 +131,7 @@ Note [Check role annotations in a second pass]</td>

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<pre style="margin: 0;"> <span id="LC131" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Role inference potentially depends on the types of all of the datacons declared</span></span>

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<pre style="margin: 0;"> <span id="LC132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in a mutually recursive group. The validity of a role annotation, in turn,</span></span>

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<pre style="margin: 0;"> <span id="LC133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">depends on the result of role inference. Because the types of datacons might</span></span>

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<pre style="margin: 0;">-<span id="LC133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">be ill-formed (see #7175 and Note [<span class="idiff left right">Checking GADT return typ</span>es]) we must check</span></span>

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<pre style="margin: 0;">+<span id="LC134" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">be ill-formed (see #7175 and Note [<span class="idiff left right">rejigConR</span>es]) we must check</span></span>

</pre>

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134

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*all* the tycons in a group for validity before checking *any* of the roles.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Thus, we take two passes over the resulting tycons, first checking for general</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC137" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">validity and then checking for valid role annotations.</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1529" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1529,27 +1530,16 @@ kcTyClDecl :: TyClDecl GhcRn -> TcTyCon -> TcM ()</td>

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<pre style="margin: 0;"> <span id="LC1530" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    result kind signature have already been dealt with</span></span>

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<pre style="margin: 0;"> <span id="LC1531" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    by inferInitialKind, so we can ignore them here.</span></span>

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<pre style="margin: 0;"> <span id="LC1532" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1532" class="line" lang="haskell"><span class="n" style="color: #333;">kcTyClDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataDecl</span> <span class="p">{</span> <span class="n" style="color: #333;">tcdLName</span>    <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC1533" class="line" lang="haskell">                     <span class="p">,</span> <span class="n" style="color: #333;">tcdDataDefn</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">defn</span> <span class="p">})</span> <span class="n" style="color: #333;">tyCon</span></span>

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<pre style="margin: 0;">-<span id="LC1534" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">HsDataDefn</span> <span class="p">{</span> <span class="n" style="color: #333;">dd_cons</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cons</span><span class="o" style="font-weight: 600;">@</span><span class="p">((</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclGADT</span> <span class="p">{}))</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC1535" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">dd_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC1536" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">dd_ND</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">defn</span></span>

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<pre style="margin: 0;">-<span id="LC1537" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Implementation of UnliftedNewtypes] STEP 2</span></span>

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<pre style="margin: 0;">-<span id="LC1538" class="line" lang="haskell">    <span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">(</span><span class="n" style="color: #333;">tyConResKind</span> <span class="n" style="color: #333;">tyCon</span><span class="p">)</span> <span class="n" style="color: #333;">cons</span></span>

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<pre style="margin: 0;">-<span id="LC1539" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1540" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- hs_tvs and dd_kindSig already dealt with in inferInitialKind</span></span>

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<td class="diff-line-num old old_line" data-linenumber="1541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1541

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1541" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- This must be a GADT-style decl,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1542

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1542" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        (see invariants of DataDefn declaration)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1543" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1543

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1543" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- so (a) we don't need to bring the hs_tvs into scope, because the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1544

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1544" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--        ConDecls bind all their own variables</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1545" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1545

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1545" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--    (b) dd_ctxt is not allowed for GADT-style decls, so we can ignore it</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1546" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1546

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1546" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1547" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1547

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1547" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">HsDataDefn</span> <span class="p">{</span> <span class="n" style="color: #333;">dd_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1548" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1548

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1548" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">dd_cons</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1549" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1549

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<td class="diff-line-num new_line old" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1549" class="line" lang="haskell">               <span class="p">,</span> <span class="n" style="color: #333;">dd_ND</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">defn</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1550" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1533

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<pre style="margin: 0;">+<span id="LC1533" class="line" lang="haskell"><span class="n" style="color: #333;">kcTyClDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataDecl</span> <span class="p">{</span> <span class="n" style="color: #333;">tcdLName</span>    <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">name</span><span class="p">),</span> <span class="n" style="color: #333;">tcdDataDefn</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">defn</span> <span class="p">})</span> <span class="n" style="color: #333;">tycon</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1550" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1534" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1534

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<pre style="margin: 0;">+<span id="LC1534" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">HsDataDefn</span> <span class="p">{</span> <span class="n" style="color: #333;">dd_ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ctxt</span><span class="p">,</span> <span class="n" style="color: #333;">dd_cons</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cons</span><span class="p">,</span> <span class="n" style="color: #333;">dd_ND</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">defn</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1550" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1550

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<td class="diff-line-num new_line" data-linenumber="1535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1535

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<pre style="margin: 0;"> <span id="LC1535" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bindTyClTyVars</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1551" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1551

</td>

<td class="diff-line-num new_line old" data-linenumber="1536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1551" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsContext</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1552" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1552

</td>

<td class="diff-line-num new_line old" data-linenumber="1536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1552" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">(</span><span class="n" style="color: #333;">tyConResKind</span> <span class="n" style="color: #333;">tyCon</span><span class="p">)</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1536

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<pre style="margin: 0;">+<span id="LC1536" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- NB: binding these tyvars isn't necessary for GADTs, but it does no</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1537

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<pre style="margin: 0;">+<span id="LC1537" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- harm.  For GADTs, each data con brings its own tyvars into scope,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1538

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<pre style="margin: 0;">+<span id="LC1538" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- and the ones from this bindTyClTyVars are either not mentioned or</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1539

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<pre style="margin: 0;">+<span id="LC1539" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- (conceivably) shadowed.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1540" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1540

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<pre style="margin: 0;">+<span id="LC1540" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"kcTyClDecl"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tycon</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConResKind</span> <span class="n" style="color: #333;">tycon</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1541

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<pre style="margin: 0;">+<span id="LC1541" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsContext</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1542

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<pre style="margin: 0;">+<span id="LC1542" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">(</span><span class="n" style="color: #333;">tyConResKind</span> <span class="n" style="color: #333;">tycon</span><span class="p">)</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1553" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1553

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<td class="diff-line-num new_line" data-linenumber="1543" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1543

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<pre style="margin: 0;"> <span id="LC1543" class="line" lang="haskell">       <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1554" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1554

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<td class="diff-line-num new_line" data-linenumber="1544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1544

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<pre style="margin: 0;"> <span id="LC1544" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1555

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<td class="diff-line-num new_line" data-linenumber="1545" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1545

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<pre style="margin: 0;"> <span id="LC1545" class="line" lang="haskell"><span class="n" style="color: #333;">kcTyClDecl</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SynDecl</span> <span class="p">{</span> <span class="n" style="color: #333;">tcdLName</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">tcdRhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span> <span class="p">})</span> <span class="n" style="color: #333;">_tycon</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1575" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1585,7 +1575,6 @@ kcConArgTys new_or_data res_kind arg_tys = do</td>

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<td class="diff-line-num old_line" data-linenumber="1585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1585

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<td class="diff-line-num new_line" data-linenumber="1575" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1575

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<pre style="margin: 0;"> <span id="LC1575" class="line" lang="haskell">  <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exp_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getArgExpKind</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1586" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1586

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<td class="diff-line-num new_line" data-linenumber="1576" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1576

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<pre style="margin: 0;"> <span id="LC1576" class="line" lang="haskell">  <span class="p">;</span> <span class="n" style="color: #333;">forM_</span> <span class="n" style="color: #333;">arg_tys</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsScaled</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcCheckLHsType</span> <span class="p">(</span><span class="n" style="color: #333;">getBangType</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">exp_kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1587" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1587

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<td class="diff-line-num new_line" data-linenumber="1577" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1577

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<pre style="margin: 0;"> <span id="LC1577" class="line" lang="haskell">                                             <span class="n" style="color: #333;">tcMult</span> <span class="n" style="color: #333;">mult</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1588" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1588

</td>

<td class="diff-line-num new_line old" data-linenumber="1578" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1588" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1589

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<td class="diff-line-num new_line" data-linenumber="1578" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1578

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<pre style="margin: 0;"> <span id="LC1578" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Implementation of UnliftedNewtypes], STEP 2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1590

</td>

<td class="diff-line-num new_line" data-linenumber="1579" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1579

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<pre style="margin: 0;"> <span id="LC1579" class="line" lang="haskell">  <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1591" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1591

</td>

<td class="diff-line-num new_line" data-linenumber="1580" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1580

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1580" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1606,13 +1595,12 @@ kcConGADTArgs new_or_data res_kind con_args = case con_args of</td>

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<td class="diff-line-num old_line" data-linenumber="1606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1606

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<td class="diff-line-num new_line" data-linenumber="1595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1595

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<pre style="margin: 0;"> <span id="LC1595" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1607" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1607

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<td class="diff-line-num new_line" data-linenumber="1596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1596

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<pre style="margin: 0;"> <span id="LC1596" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecls</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1608" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1608

</td>

<td class="diff-line-num new_line" data-linenumber="1597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1597

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<pre style="margin: 0;"> <span id="LC1597" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Kind</span>             <span class="c1" style="color: #998; font-style: italic;">-- The result kind signature</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1598

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<pre style="margin: 0;">+<span id="LC1598" class="line" lang="haskell">                               <span class="c1" style="color: #998; font-style: italic;">--   Used only in H98 case</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1609

</td>

<td class="diff-line-num new_line" data-linenumber="1599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1599

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<pre style="margin: 0;"> <span id="LC1599" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- The data constructors</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1610" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1610

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<td class="diff-line-num new_line" data-linenumber="1600" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1600

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<pre style="margin: 0;"> <span id="LC1600" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1611" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1611

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<td class="diff-line-num new_line old" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1611" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1612" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1612

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<td class="diff-line-num new_line old" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1612" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">wrapLocM_</span> <span class="p">(</span><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">final_res_kind</span><span class="p">))</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1613" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1613

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<td class="diff-line-num new_line old" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1613" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1614" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1614

</td>

<td class="diff-line-num new_line old" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1614" class="line" lang="haskell">    <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">final_res_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">splitPiTys</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1615" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1615

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<td class="diff-line-num new_line old" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1615" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [kcConDecls result kind]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1616" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1601" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1601

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<pre style="margin: 0;">+<span id="LC1601" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [kcConDecls: kind-checking data type decls]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1616" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1602" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1602

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<pre style="margin: 0;">+<span id="LC1602" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">tc_res_kind</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1616" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1603" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1603

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<pre style="margin: 0;">+<span id="LC1603" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapM_</span> <span class="p">(</span><span class="n" style="color: #333;">wrapLocM_</span> <span class="p">(</span><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">tc_res_kind</span><span class="p">))</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1616" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1616

</td>

<td class="diff-line-num new_line" data-linenumber="1604" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1604

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<pre style="margin: 0;"> <span id="LC1604" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1617" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1617

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<td class="diff-line-num new_line" data-linenumber="1605" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1605

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<pre style="margin: 0;"> <span id="LC1605" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Kind check a data constructor. In additional to the data constructor,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1618" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1618

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<td class="diff-line-num new_line" data-linenumber="1606" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1606

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<pre style="margin: 0;"> <span id="LC1606" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- we also need to know about whether or not its corresponding type was</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1623" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1611" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1623,82 +1611,77 @@ kcConDecl :: NewOrData</td>

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<td class="diff-line-num old_line" data-linenumber="1623" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1623

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<td class="diff-line-num new_line" data-linenumber="1611" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1611

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<pre style="margin: 0;"> <span id="LC1611" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Kind</span>  <span class="c1" style="color: #998; font-style: italic;">-- Result kind of the type constructor</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1624" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1624

</td>

<td class="diff-line-num new_line" data-linenumber="1612" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1612

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<pre style="margin: 0;"> <span id="LC1612" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Usually Type but can be TYPE UnliftedRep</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1625" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1625

</td>

<td class="diff-line-num new_line" data-linenumber="1613" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1613

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<pre style="margin: 0;"> <span id="LC1613" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- or even TYPE r, in the case of unlifted newtype</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1614" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1614

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1614" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- Used only in H98 case</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1626

</td>

<td class="diff-line-num new_line" data-linenumber="1615" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1615

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<pre style="margin: 0;"> <span id="LC1615" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1627" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1627

</td>

<td class="diff-line-num new_line" data-linenumber="1616" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1616

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<pre style="margin: 0;"> <span id="LC1616" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1628

</td>

<td class="diff-line-num new_line old" data-linenumber="1617" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1628" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclH98</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1617" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1617

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1617" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;"><span class="idiff left right">tc_</span>res_kind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclH98</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1629

</td>

<td class="diff-line-num new_line" data-linenumber="1618" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1618

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<pre style="margin: 0;"> <span id="LC1618" class="line" lang="haskell">  <span class="p">{</span> <span class="n" style="color: #333;">con_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">con_ex_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ex_tvs</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1630" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1630

</td>

<td class="diff-line-num new_line" data-linenumber="1619" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1619

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1619" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">con_mb_cxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ex_ctxt</span><span class="p">,</span> <span class="n" style="color: #333;">con_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span> <span class="p">})</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1631

</td>

<td class="diff-line-num new_line old" data-linenumber="1620" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1631" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt<span class="idiff left right">Name</span></span> <span class="p">[</span><span class="n" style="color: #333;">name</span><span class="p">])</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1632" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1620" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1620

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1620" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="p">[</span><span class="n" style="color: #333;">name</span><span class="p">])</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1632" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1632

</td>

<td class="diff-line-num new_line" data-linenumber="1621" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1621

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<pre style="margin: 0;"> <span id="LC1621" class="line" lang="haskell">    <span class="n" style="color: #333;">discardResult</span>                   <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1633" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1633

</td>

<td class="diff-line-num new_line" data-linenumber="1622" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1622

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1622" class="line" lang="haskell">    <span class="n" style="color: #333;">bindExplicitTKBndrs_Tv</span> <span class="n" style="color: #333;">ex_tvs</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1634

</td>

<td class="diff-line-num new_line" data-linenumber="1623" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1623

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1623" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsMbContext</span> <span class="n" style="color: #333;">ex_ctxt</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1635

</td>

<td class="diff-line-num new_line old" data-linenumber="1624" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1635" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConH98Args</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">args</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1636" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1624" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1624

</td>

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<pre style="margin: 0;">+<span id="LC1624" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConH98Args</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;"><span class="idiff left right">tc_</span>res_kind</span> <span class="n" style="color: #333;">args</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1636" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1636

</td>

<td class="diff-line-num new_line" data-linenumber="1625" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1625

</td>

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<pre style="margin: 0;"> <span id="LC1625" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- We don't need to check the telescope here,</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1637" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1637

</td>

<td class="diff-line-num new_line" data-linenumber="1626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1626

</td>

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<pre style="margin: 0;"> <span id="LC1626" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- because that's done in tcConDecl</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1638

</td>

<td class="diff-line-num new_line" data-linenumber="1627" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1627

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1627" class="line" lang="haskell">       <span class="p">}</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1639" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1639

</td>

<td class="diff-line-num new_line" data-linenumber="1628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1628

</td>

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<pre style="margin: 0;"> <span id="LC1628" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1640

</td>

<td class="diff-line-num new_line old" data-linenumber="1629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1640" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclGADT</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1641" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1629

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1629" class="line" lang="haskell"><span class="n" style="color: #333;">kcConDecl</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1641" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1630" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1630

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1630" class="line" lang="haskell">          <span class="n" style="color: #333;">_tc_res_kind</span>   <span class="c1" style="color: #998; font-style: italic;">-- Not used in GADT case (and doesn't make sense)</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1641" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1631

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<pre style="margin: 0;">+<span id="LC1631" class="line" lang="haskell">          <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclGADT</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1641" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1641

</td>

<td class="diff-line-num new_line" data-linenumber="1632" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1632

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<pre style="margin: 0;"> <span id="LC1632" class="line" lang="haskell">    <span class="p">{</span> <span class="n" style="color: #333;">con_names</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">names</span><span class="p">,</span> <span class="n" style="color: #333;">con_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">outer_bndrs</span><span class="p">,</span> <span class="n" style="color: #333;">con_mb_cxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cxt</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1642" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1642

</td>

<td class="diff-line-num new_line" data-linenumber="1633" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1633

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<pre style="margin: 0;"> <span id="LC1633" class="line" lang="haskell">    <span class="p">,</span> <span class="n" style="color: #333;">con_g_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">con_res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">})</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1643" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1643

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1643" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- Even though the GADT-style data constructor's type is closed,</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1644" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1644

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1644" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- we must still kind-check the type, because that may influence</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1645" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1645

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1645" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the inferred kind of the /type/ constructor.  Example:</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1646

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1646" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--    data T f a where</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1647

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1647" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--      MkT :: f a -> T f a</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1648" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1648

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1648" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- If we don't look at MkT we won't get the correct kind</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1649" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1649

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1649" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- for the type constructor T</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1650" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1650

</td>

<td class="diff-line-num new_line old" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1650" class="line" lang="haskell">    <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxtName</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1651" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1634

</td>

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<pre style="margin: 0;">+<span id="LC1634" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="c1" style="color: #998; font-style: italic;">-- See Note [kcConDecls: kind-checking data type decls]</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1651" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1635

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1635" class="line" lang="haskell">    <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1651" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1651

</td>

<td class="diff-line-num new_line" data-linenumber="1636" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1636

</td>

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<pre style="margin: 0;"> <span id="LC1636" class="line" lang="haskell">    <span class="n" style="color: #333;">discardResult</span>                      <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1652" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1652

</td>

<td class="diff-line-num new_line" data-linenumber="1637" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1637

</td>

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<pre style="margin: 0;"> <span id="LC1637" class="line" lang="haskell">    <span class="n" style="color: #333;">bindOuterSigTKBndrs_Tv</span> <span class="n" style="color: #333;">outer_bndrs</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1653" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1653

</td>

<td class="diff-line-num new_line old" data-linenumber="1638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1653" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Why "_Tv"?  See Note [<span class="idiff left right">Kind-checking for</span> GADTs]</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1654" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1638

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1638" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Why "_Tv"?  See Note [<span class="idiff left right">Using TyVarTvs for kind-checking</span> GADTs]</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1654" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1654

</td>

<td class="diff-line-num new_line" data-linenumber="1639" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1639

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<pre style="margin: 0;"> <span id="LC1639" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsMbContext</span> <span class="n" style="color: #333;">cxt</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1655" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1655

</td>

<td class="diff-line-num new_line old" data-linenumber="1640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1655" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConGADTArgs</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">args</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1656" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1656

</td>

<td class="diff-line-num new_line old" data-linenumber="1640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1656" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcHsOpenType</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1640

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1640" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"kcConDecl:GADT {"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">names</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1641" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1641

</td>

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<pre style="margin: 0;">+<span id="LC1641" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">con_res_kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newOpenTypeKind</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1642" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1642

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1642" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcCheckLHsType</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TheKind</span> <span class="n" style="color: #333;">con_res_kind</span><span class="p">)</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1643" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1643

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1643" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kcConGADTArgs</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">con_res_kind</span> <span class="n" style="color: #333;">args</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1644" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1644

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1644" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"kcConDecl:GADT }"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">names</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con_res_kind</span><span class="p">)</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1657

</td>

<td class="diff-line-num new_line" data-linenumber="1645" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1645

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1645" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">}</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1658" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1658

</td>

<td class="diff-line-num new_line" data-linenumber="1646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1646

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1646" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1659" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1659

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1659" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [kcConDecls result kind]</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1660" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1660

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1660" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1661" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1661

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1661" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We might have e.g.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1662" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1662

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1662" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    data T a :: Type -> Type where ...</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1663" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1663

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1663" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">or</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1664" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1664

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    newtype instance N a :: Type -> Type  where ..</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1665" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1665

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1665" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in which case, the 'res_kind' passed to kcConDecls will be</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1666" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1666

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1666" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Type->Type</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1667" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1667

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1667" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1668" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1668

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1668" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We must look past those arrows, or even foralls, to the Type in the</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1669" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1669

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1669" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">corner, to pass to kcConDecl c.f. #16828. Hence the splitPiTys here.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1670

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1670" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1671

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1671" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">I am a bit concerned about tycons with a declaration like</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1672" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1672

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1672" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data T a :: Type -> forall k. k -> Type  where ...</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1673" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1673

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1673" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1674" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1674

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1674" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It does not have a CUSK, so kcInferDeclHeader will make a TcTyCon</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1675" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1675

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1675" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with tyConResKind of Type -> forall k. k -> Type.  Even that is fine:</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1676" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1676

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1676" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the splitPiTys will look past the forall.  But I'm bothered about</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1677" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1677

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1677" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">what if the type "in the corner" mentions k?  This is incredibly</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1678" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1678

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1678" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">obscure but something like this could be bad:</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1679" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1679

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1679" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data T a :: Type -> foral k. k -> TYPE (F k) where ...</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1680" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1680

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1680" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1681" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1681

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1681" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">I bet we are not quite right here, but my brain suffered a buffer</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1682" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1682

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1682" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">overflow and I thought it best to nail the common cases right now.</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1683" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1683

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1683" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1684" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1684

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1684" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Recursion and promoting data constructors]</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1685" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1685

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1685" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1686" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1686

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1686" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We don't want to allow promotion in a strongly connected component</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1687" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1687

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1687" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">when kind checking.</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1688

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1688" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1689

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<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1689" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider:</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1690

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1690" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data T f = K (f (K Any))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1691

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<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1691" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1692" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1692

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1692" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When kind checking the `data T' declaration the local env contains the</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1693" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1693

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1693" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">mappings:</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1694

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1694" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  T -> ATcTyCon <some initial kind></span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1695

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1695" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  K -> APromotionErr</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1696" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1696

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1696" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1697" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1697

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1697" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">APromotionErr is only used for DataCons, and only used during type checking</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1698" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1698

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1698" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in tcTyClGroup.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1699" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1699

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1699" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1700" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1700

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1700" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Kind-checking for GADTs]</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1701" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1701

</td>

<td class="diff-line-num new_line old" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1701" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1702" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1647" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1647

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<pre style="margin: 0;">+<span id="LC1647" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [kcConDecls: kind-checking data type decls]</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1702" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1648" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1648

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<pre style="margin: 0;">+<span id="LC1648" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1702" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1649" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1649

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<pre style="margin: 0;">+<span id="LC1649" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kcConDecls is used when we are inferring the kind of the type</span></span>

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<pre style="margin: 0;">+<span id="LC1650" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">constructor in a data type declaration.  E.g.</span></span>

</pre>

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1651

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<pre style="margin: 0;">+<span id="LC1651" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    data T f a = MkT (f a)</span></span>

</pre>

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1652

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<pre style="margin: 0;">+<span id="LC1652" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we want to infer the kind of 'f' and 'a'. The basic plan is described</span></span>

</pre>

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1653

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<pre style="margin: 0;">+<span id="LC1653" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in Note [Inferring kinds for type declarations]; here we are doing Step 2.</span></span>

</pre>

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1654

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<pre style="margin: 0;">+<span id="LC1654" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1655" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the GADT case we may have this:</span></span>

</pre>

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1656

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<pre style="margin: 0;">+<span id="LC1656" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data T f a where</span></span>

</pre>

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1657

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<pre style="margin: 0;">+<span id="LC1657" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      MkT :: forall g b. g b -> T g b</span></span>

</pre>

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1658

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<pre style="margin: 0;">+<span id="LC1658" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1659" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Notice that the variables f,a, and g,b are quite distinct.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1660" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Nevertheless, the type signature for MkT must still influence the kind</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1661" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">T which is (remember Step 1) something like</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1662" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  T :: kappa1 -> kappa2 -> Type</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1663" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Otherwise we'd infer the bogus kind</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1664" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  T :: forall k1 k2. k1 -> k2 -> Type.</span></span>

</pre>

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1665

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<pre style="margin: 0;">+<span id="LC1665" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1666" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The type signature for MkT influences the kind of T simply by</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1667" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kind-checking the result type (T g b), which will force 'f' and 'g' to</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1668" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">have the same kinds. This is the call to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1669" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1669

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<pre style="margin: 0;">+<span id="LC1669" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    tcCheckLHsType res_ty (TheKind con_res_kind)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1670

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<pre style="margin: 0;">+<span id="LC1670" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Because this is the result type of an arrow, we know the kind must be</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1671

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<pre style="margin: 0;">+<span id="LC1671" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of form (TYPE rr), and we get better error messages if we enforce that</span></span>

</pre>

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1672

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<pre style="margin: 0;">+<span id="LC1672" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">here (e.g. test gadt10).</span></span>

</pre>

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1673

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<pre style="margin: 0;">+<span id="LC1673" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1674" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1674

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<pre style="margin: 0;">+<span id="LC1674" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For unlifted newtypes only, we must ensure that the argument kind</span></span>

</pre>

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1675

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<pre style="margin: 0;">+<span id="LC1675" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and result kind are the same:</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1676" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1676

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<pre style="margin: 0;">+<span id="LC1676" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* In the H98 case, we need the result kind of the TyCon, to unify with</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1677" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1677

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<pre style="margin: 0;">+<span id="LC1677" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  the argument kind.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1678" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1678

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<pre style="margin: 0;">+<span id="LC1678" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1679" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1679

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<pre style="margin: 0;">+<span id="LC1679" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* In GADT syntax, this unification happens via the result kind passed</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1680" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1680

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<pre style="margin: 0;">+<span id="LC1680" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  to kcConGADTArgs. The tycon's result kind is not used at all in the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1681" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1681

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<pre style="margin: 0;">+<span id="LC1681" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  GADT case.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1682" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1682

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<pre style="margin: 0;">+<span id="LC1682" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1683" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC1683" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Using TyVarTvs for kind-checking GADTs]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1684" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1684

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<pre style="margin: 0;">+<span id="LC1684" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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1702

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<td class="diff-line-num new_line" data-linenumber="1685" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1685

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<pre style="margin: 0;"> <span id="LC1685" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

</pre>

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1686

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<pre style="margin: 0;"> <span id="LC1686" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="1687" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1687" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data Proxy a where</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1708,26 +1691,27 @@ Consider</td>

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1708

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<td class="diff-line-num new_line" data-linenumber="1691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1691

</td>

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<pre style="margin: 0;"> <span id="LC1691" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">It seems reasonable that this should be accepted. But something very strange</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1709

</td>

<td class="diff-line-num new_line" data-linenumber="1692" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1692

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<pre style="margin: 0;"> <span id="LC1692" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is going on here: when we're kind-checking this declaration, we need to unify</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1710

</td>

<td class="diff-line-num new_line" data-linenumber="1693" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1693

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1693" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the kind of `a` with k and j -- even though k and j's scopes are local to the type of</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1711

</td>

<td class="diff-line-num new_line old" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1711" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">MkProxy{1,2}. The best approach we've come up with is to use TyVarTvs during</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1712

</td>

<td class="diff-line-num new_line old" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1712" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the kind-checking pass. First off, note that it's OK if the kind-checking pass</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1713

</td>

<td class="diff-line-num new_line old" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1713" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is too permissive: we'll snag the problems in the type-checking pass later.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1714

</td>

<td class="diff-line-num new_line old" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1714" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(This extra permissiveness might happen with something like</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1694

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<pre style="margin: 0;">+<span id="LC1694" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">MkProxy{1,2}.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1695

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1695" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1696" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1696

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<pre style="margin: 0;">+<span id="LC1696" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In effect, we are simply gathering constraints on the shape of Proxy's</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1697" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1697

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1697" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kind, with no skolemisation or implication constraints involved at all.</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1698" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1698

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1698" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1699" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1699

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1699" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The best approach we've come up with is to use TyVarTvs during the</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1700" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1700

</td>

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<pre style="margin: 0;">+<span id="LC1700" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kind-checking pass, rather than ordinary skolems. This is why we use</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1701" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1701

</td>

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<pre style="margin: 0;">+<span id="LC1701" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the "_Tv" variant, bindOuterSigTKBndrs_Tv.</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1702" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1702

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1702" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1703" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1703

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<pre style="margin: 0;">+<span id="LC1703" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Our only goal is to gather constraints on the kind of the type constructor;</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1704" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1704

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1704" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we do not certify that the data declaration is well-kinded. For example:</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1715

</td>

<td class="diff-line-num new_line" data-linenumber="1705" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1705

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1705" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1716

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<td class="diff-line-num new_line" data-linenumber="1706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1706

</td>

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<pre style="margin: 0;"> <span id="LC1706" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data SameKind :: k -> k -> Type</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1717

</td>

<td class="diff-line-num new_line" data-linenumber="1707" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1707

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<pre style="margin: 0;"> <span id="LC1707" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data Bad a where</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1718

</td>

<td class="diff-line-num new_line" data-linenumber="1708" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1708

</td>

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<pre style="margin: 0;"> <span id="LC1708" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    MkBad :: forall k1 k2 (a :: k1) (b :: k2). Bad (SameKind a b)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1719

</td>

<td class="diff-line-num new_line" data-linenumber="1709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1709

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1709" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1720

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1720" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">which would be accepted if k1 and k2 were TyVarTvs. This is correctly rejected</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1721

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1721" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in the second pass, though. Test case: polykinds/TyVarTvKinds3)</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1722

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1722" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Recall that the kind-checking pass exists solely to collect constraints</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1723

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1723" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">on the kinds and to power unification.</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1724

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1724" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1725" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1725

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1725" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">To achieve the use of TyVarTvs, we must be careful to use specialized functions</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1726

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1726" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that produce TyVarTvs, not ordinary skolems. This is why we need</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1727" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1727

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1727" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kcExplicitTKBndrs and kcImplicitTKBndrs in GHC.Tc.Gen.HsType, separate from their</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1728" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1728

</td>

<td class="diff-line-num new_line old" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1728" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">tc... variants.</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1710

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1710" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">which would be accepted by kcConDecl because k1 and k2 are</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1711

</td>

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<pre style="margin: 0;">+<span id="LC1711" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">TyVarTvs. It is correctly rejected in the second pass, tcConDecl.</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1712

</td>

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<pre style="margin: 0;">+<span id="LC1712" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(Test case: polykinds/TyVarTvKinds3)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1729

</td>

<td class="diff-line-num new_line" data-linenumber="1713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1713

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1713" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="1730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1730

</td>

<td class="diff-line-num new_line old" data-linenumber="1714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1730" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">Th</span>e drawback of this approach is sometimes it will accept a definition that</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1714

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1714" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"><span class="idiff left right">On</span>e drawback of this approach is sometimes it will accept a definition that</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="1731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1731

</td>

<td class="diff-line-num new_line" data-linenumber="1715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1715

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1715" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">a (hypothetical) declarative specification would likely reject. As a general</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1732

</td>

<td class="diff-line-num new_line" data-linenumber="1716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1716

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1716" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">rule, we don't want to allow polymorphic recursion without a CUSK. Indeed,</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1733

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1717

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<pre style="margin: 0;"> <span id="LC1717" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the whole point of CUSKs is to allow polymorphic recursion. Yet, the TyVarTvs</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1746" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1746,6 +1730,23 @@ be rejected (without a CUSK). However, the accepted definitions are indeed</td>

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1746

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1730

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<pre style="margin: 0;"> <span id="LC1730" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">well-kinded and any rejected definitions would be accepted with a CUSK,</span></span>

</pre>

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1747

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1731

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<pre style="margin: 0;"> <span id="LC1731" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and so this wrinkle need not cause anyone to lose sleep.</span></span>

</pre>

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1748

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<td class="diff-line-num new_line" data-linenumber="1732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1732

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<pre style="margin: 0;"> <span id="LC1732" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1749" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1733

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<pre style="margin: 0;">+<span id="LC1733" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Recursion and promoting data constructors]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1734

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<pre style="margin: 0;">+<span id="LC1734" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1735

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<pre style="margin: 0;">+<span id="LC1735" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We don't want to allow promotion in a strongly connected component</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1736

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<pre style="margin: 0;">+<span id="LC1736" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">when kind checking.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1737

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<pre style="margin: 0;">+<span id="LC1737" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1738

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<pre style="margin: 0;">+<span id="LC1738" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider:</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1739

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<pre style="margin: 0;">+<span id="LC1739" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data T f = K (f (K Any))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1740

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<pre style="margin: 0;">+<span id="LC1740" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1741" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1741

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<pre style="margin: 0;">+<span id="LC1741" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When kind checking the `data T' declaration the local env contains the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1742" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1742

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<pre style="margin: 0;">+<span id="LC1742" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">mappings:</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1743" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1743

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<pre style="margin: 0;">+<span id="LC1743" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  T -> ATcTyCon <some initial kind></span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1744" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1744

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<pre style="margin: 0;">+<span id="LC1744" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  K -> APromotionErr</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1745" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1745

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<pre style="margin: 0;">+<span id="LC1745" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="1746" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1746

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<pre style="margin: 0;">+<span id="LC1746" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">APromotionErr is only used for DataCons, and only used during type checking</span></span>

</pre>

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1747

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<pre style="margin: 0;">+<span id="LC1747" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in tcTyClGroup.</span></span>

</pre>

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1748

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<pre style="margin: 0;">+<span id="LC1748" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC1749" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC1750" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

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<pre style="margin: 0;"> <span id="LC1751" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

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<pre style="margin: 0;"> <span id="LC1752" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">\subsection{Type checking}</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2782,18 +2783,14 @@ tcDataDefn err_ctxt roles_info tc_name</td>

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<pre style="margin: 0;"> <span id="LC2783" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">isJust</span> <span class="n" style="color: #333;">mb_ksig</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC2784" class="line" lang="haskell">         <span class="n" style="color: #333;">checkTc</span> <span class="p">(</span><span class="n" style="color: #333;">kind_signatures</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">badSigTyDecl</span> <span class="n" style="color: #333;">tc_name</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC2785" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC2785" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fixM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;">+<span id="LC2786" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fixM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;"><span class="idiff left right">rec_</span>tycon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;"> <span id="LC2787" class="line" lang="haskell">             <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">final_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tycon_binders</span> <span class="p">`</span><span class="n" style="color: #333;">chkAppend</span><span class="p">`</span> <span class="n" style="color: #333;">extra_bndrs</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2788" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2787" class="line" lang="haskell">                   <span class="n" style="color: #333;">res_ty</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">tycon</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTys</span> <span class="p">(</span><span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">final_bndrs</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC2788" class="line" lang="haskell">                   <span class="n" style="color: #333;">roles</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">roles_info</span> <span class="n" style="color: #333;">tc_name</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2789" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">data_cons</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcConDecls</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2790" class="line" lang="haskell">                              <span class="n" style="color: #333;">tycon</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2791" class="line" lang="haskell">                              <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2792" class="line" lang="haskell">                              <span class="n" style="color: #333;">final_bndrs</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2793" class="line" lang="haskell">                              <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2790" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2794" class="line" lang="haskell">                              <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2790" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2790

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<pre style="margin: 0;">+<span id="LC2790" class="line" lang="haskell">                              <span class="n" style="color: #333;">new_or_data</span> <span class="kt" style="color: #458; font-weight: 600;">DDataType</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2791" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2791

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<pre style="margin: 0;">+<span id="LC2791" class="line" lang="haskell">                              <span class="n" style="color: #333;">rec_tycon</span> <span class="n" style="color: #333;">final_bndrs</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2795

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<td class="diff-line-num new_line" data-linenumber="2792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2792

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<pre style="margin: 0;"> <span id="LC2792" class="line" lang="haskell">                              <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2796

</td>

<td class="diff-line-num new_line old" data-linenumber="2793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2796" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">tc_rhs</span>    <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mk_tc_rhs</span> <span class="n" style="color: #333;">hsc_src</span> <span class="n" style="color: #333;">tycon</span> <span class="n" style="color: #333;">data_cons</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2793

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<pre style="margin: 0;">+<span id="LC2793" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">tc_rhs</span>    <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mk_tc_rhs</span> <span class="n" style="color: #333;">hsc_src</span> <span class="n" style="color: #333;"><span class="idiff left right">rec_</span>tycon</span> <span class="n" style="color: #333;">data_cons</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2797

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<td class="diff-line-num new_line" data-linenumber="2794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2794

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<pre style="margin: 0;"> <span id="LC2794" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">tc_rep_nm</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newTyConRepName</span> <span class="n" style="color: #333;">tc_name</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2798" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2798

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<td class="diff-line-num new_line" data-linenumber="2795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2795

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<pre style="margin: 0;"> <span id="LC2795" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkAlgTyCon</span> <span class="n" style="color: #333;">tc_name</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2799

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<td class="diff-line-num new_line" data-linenumber="2796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2796

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<pre style="margin: 0;"> <span id="LC2796" class="line" lang="haskell">                                  <span class="n" style="color: #333;">final_bndrs</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3195,36 +3192,51 @@ consUseGadtSyntax _                          = False</td>

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3195

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<td class="diff-line-num new_line" data-linenumber="3192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3192

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<pre style="margin: 0;"> <span id="LC3192" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- All constructors have same shape</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3196

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<td class="diff-line-num new_line" data-linenumber="3193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3193

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<pre style="margin: 0;"> <span id="LC3193" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3197

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<td class="diff-line-num new_line" data-linenumber="3194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3194

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<pre style="margin: 0;"> <span id="LC3194" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3198

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<td class="diff-line-num new_line old" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3198" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecls</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3199

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<td class="diff-line-num new_line old" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3199" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span>   <span class="c1" style="color: #998; font-style: italic;">-- binders and result kind of tycon</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3200" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3200

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<td class="diff-line-num new_line old" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3200" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3201

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<td class="diff-line-num new_line old" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3201" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecls</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">res_tmpl</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3195

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<pre style="margin: 0;">+<span id="LC3195" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">DataDeclInfo</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3196

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<pre style="margin: 0;">+<span id="LC3196" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DDataType</span>      <span class="c1" style="color: #998; font-style: italic;">-- data T a b = T1 a | T2 b</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3197

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<pre style="margin: 0;">+<span id="LC3197" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">DDataInstance</span>  <span class="c1" style="color: #998; font-style: italic;">-- data instance D [a] = D1 a | D2</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3198

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<pre style="margin: 0;">+<span id="LC3198" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">Type</span>        <span class="c1" style="color: #998; font-style: italic;">--   The header D [a]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3199

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3199" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3200" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3200

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<pre style="margin: 0;">+<span id="LC3200" class="line" lang="haskell"><span class="n" style="color: #333;">mkDDHeaderTy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DataDeclInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3201

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<pre style="margin: 0;">+<span id="LC3201" class="line" lang="haskell"><span class="n" style="color: #333;">mkDDHeaderTy</span> <span class="n" style="color: #333;">dd_info</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tc_bndrs</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3202

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<pre style="margin: 0;">+<span id="LC3202" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dd_info</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3203

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<pre style="margin: 0;">+<span id="LC3203" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">DDataType</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3204

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<pre style="margin: 0;">+<span id="LC3204" class="line" lang="haskell">                   <span class="n" style="color: #333;">mkTyVarTys</span> <span class="p">(</span><span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">tc_bndrs</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3205

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3205" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">DDataInstance</span> <span class="n" style="color: #333;">header_ty</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">header_ty</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3206

</td>

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<pre style="margin: 0;">+<span id="LC3206" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3207

</td>

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<pre style="margin: 0;">+<span id="LC3207" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecls</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3208

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3208" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DataDeclInfo</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3209

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3209" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span>            <span class="c1" style="color: #998; font-style: italic;">-- Representation TyCon</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3210

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<pre style="margin: 0;">+<span id="LC3210" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span>             <span class="c1" style="color: #998; font-style: italic;">-- Binders of representation TyCon</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3211

</td>

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<pre style="margin: 0;">+<span id="LC3211" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span>                    <span class="c1" style="color: #998; font-style: italic;">-- Result kind</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3212

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<pre style="margin: 0;">+<span id="LC3212" class="line" lang="haskell">           <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3213

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<pre style="margin: 0;">+<span id="LC3213" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">dd_info</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3202

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<td class="diff-line-num new_line" data-linenumber="3214" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3214

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<pre style="margin: 0;"> <span id="LC3214" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">concatMapM</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">addLocM</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3203

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3203" class="line" lang="haskell">    <span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyConTagMap</span> <span class="n" style="color: #333;">rep_tycon</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3204

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3204" class="line" lang="haskell">              <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">res_kind</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3205

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3205" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It's important that we pay for tag allocation here, once per TyCon,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3206

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3206" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Constructor tag allocation], fixes #14657</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3207

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3207" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3208

</td>

<td class="diff-line-num new_line old" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3208" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span>          <span class="c1" style="color: #998; font-style: italic;">-- Representation tycon. Knot-tied!</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3215

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<pre style="margin: 0;">+<span id="LC3215" class="line" lang="haskell">    <span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">dd_info</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3216" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3216

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<pre style="margin: 0;">+<span id="LC3216" class="line" lang="haskell">              <span class="p">(</span><span class="n" style="color: #333;">mkTyConTagMap</span> <span class="n" style="color: #333;">rep_tycon</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3217" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3217

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<pre style="margin: 0;">+<span id="LC3217" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- mkTyConTagMap: it's important that we pay for tag allocation here,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3218

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<pre style="margin: 0;">+<span id="LC3218" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- once per TyCon. See Note [Constructor tag allocation], fixes #14657</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3219

</td>

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<pre style="margin: 0;">+<span id="LC3219" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3220

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<pre style="margin: 0;">+<span id="LC3220" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3221

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<pre style="margin: 0;">+<span id="LC3221" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DataDeclInfo</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3222

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<pre style="margin: 0;">+<span id="LC3222" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span>   <span class="c1" style="color: #998; font-style: italic;">-- Representation tycon. Knot-tied!</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3223

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<pre style="margin: 0;">+<span id="LC3223" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span>    <span class="c1" style="color: #998; font-style: italic;">-- Binders of representation TyCon</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3224

</td>

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<pre style="margin: 0;">+<span id="LC3224" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span>           <span class="c1" style="color: #998; font-style: italic;">-- Result kind</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3209

</td>

<td class="diff-line-num new_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3225

</td>

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<pre style="margin: 0;"> <span id="LC3225" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="kt" style="color: #458; font-weight: 600;">ConTag</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3210

</td>

<td class="diff-line-num new_line old" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3210" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcKind</span>   <span class="c1" style="color: #998; font-style: italic;">-- tycon binders and result kind</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3211

</td>

<td class="diff-line-num new_line old" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3211" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3212

</td>

<td class="diff-line-num new_line old" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3212" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- Return type template (T tys), where T is the family TyCon</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3213

</td>

<td class="diff-line-num new_line old" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3213" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3214" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3214

</td>

<td class="diff-line-num new_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3226

</td>

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<pre style="margin: 0;"> <span id="LC3226" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ConDecl</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3215

</td>

<td class="diff-line-num new_line" data-linenumber="3227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3227

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3227" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">]</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3216" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3216

</td>

<td class="diff-line-num new_line" data-linenumber="3228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3228

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3228" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3217" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3217

</td>

<td class="diff-line-num new_line old" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3217" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;"><span class="idiff left">rep_tycon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tag_map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tmpl_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">res_kind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">res_tmpl</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">new_or_data</span></span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3229

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3229" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;"><span class="idiff left">new_or_data</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dd_info</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rep_tycon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tc_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">res_kind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tag_map</span></span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3218

</td>

<td class="diff-line-num new_line" data-linenumber="3230" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3230

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3230" class="line" lang="haskell">          <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclH98</span> <span class="p">{</span> <span class="n" style="color: #333;">con_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lname</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3219

</td>

<td class="diff-line-num new_line" data-linenumber="3231" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3231

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3231" class="line" lang="haskell">                      <span class="p">,</span> <span class="n" style="color: #333;">con_ex_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">explicit_tkv_nms</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3220

</td>

<td class="diff-line-num new_line" data-linenumber="3232" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3232

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3232" class="line" lang="haskell">                      <span class="p">,</span> <span class="n" style="color: #333;">con_mb_cxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_ctxt</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3221

</td>

<td class="diff-line-num new_line" data-linenumber="3233" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3233

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3233" class="line" lang="haskell">                      <span class="p">,</span> <span class="n" style="color: #333;">con_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_args</span> <span class="p">})</span></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3222

</td>

<td class="diff-line-num new_line old" data-linenumber="3234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3222" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt<span class="idiff left right">Name</span></span> <span class="p">[</span><span class="n" style="color: #333;">lname</span><span class="p">])</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3234" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3234

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3234" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="p">[</span><span class="n" style="color: #333;">lname</span><span class="p">])</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3223

</td>

<td class="diff-line-num new_line" data-linenumber="3235" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3235

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3235" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- NB: the tyvars from the declaration header are in scope</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3224

</td>

<td class="diff-line-num new_line" data-linenumber="3236" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3236

</td>

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<pre style="margin: 0;"> <span id="LC3236" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3225

</td>

<td class="diff-line-num new_line" data-linenumber="3237" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3237

</td>

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<pre style="margin: 0;"> <span id="LC3237" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Get hold of the existential type variables</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3226

</td>

<td class="diff-line-num new_line" data-linenumber="3238" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3238

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<pre style="margin: 0;"> <span id="LC3238" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- e.g. data T a = forall k (b::k) f. MkT a (f b)</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3227

</td>

<td class="diff-line-num new_line old" data-linenumber="3239" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3227" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Here t<span class="idiff left right">mpl</span>_bndrs = {a}</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3239" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3239

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<pre style="margin: 0;">+<span id="LC3239" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- Here t<span class="idiff left right">c</span>_bndrs = {a}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3228" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3228

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<td class="diff-line-num new_line" data-linenumber="3240" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3240

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<pre style="margin: 0;"> <span id="LC3240" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--      hs_qvars = HsQTvs { hsq_implicit = {k}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3229

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<td class="diff-line-num new_line" data-linenumber="3241" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3241

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<pre style="margin: 0;"> <span id="LC3241" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--                        , hsq_explicit = {f,b} }</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3230" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3230

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<td class="diff-line-num new_line" data-linenumber="3242" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3242

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3242" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3242" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3242,29 +3254,35 @@ tcConDecl rep_tycon tag_map tmpl_bndrs res_kind res_tmpl new_or_data</td>

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3242

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<td class="diff-line-num new_line" data-linenumber="3254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3254

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<pre style="margin: 0;"> <span id="LC3254" class="line" lang="haskell">                 <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3243" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3243

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<td class="diff-line-num new_line" data-linenumber="3255" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3255

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<pre style="margin: 0;"> <span id="LC3255" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3244" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3244

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<td class="diff-line-num new_line" data-linenumber="3256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3256

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<pre style="margin: 0;"> <span id="LC3256" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3245" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3245

</td>

<td class="diff-line-num new_line old" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3245" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">t<span class="idiff left">mpl_tvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binderVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tmpl</span>_bndrs</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3246" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3246

</td>

<td class="diff-line-num new_line old" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3246" class="line" lang="haskell">       <span class="p"><span class="idiff left">;</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">let</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fake_ty</span></span><span class="idiff">  </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkSpecForAllTys</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tmpl_tvs</span></span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3257

</td>

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<pre style="margin: 0;">+<span id="LC3257" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">t<span class="idiff left">c_tvs</span></span><span class="idiff">   </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binderVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tc</span>_bndrs</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3258" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3258

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<pre style="margin: 0;">+<span id="LC3258" class="line" lang="haskell">       <span class="idiff left">      </span><span class="n" style="color: #333;"><span class="idiff">fake_ty</span></span><span class="idiff">  </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkSpecForAllTys</span></span><span class="idiff">  </span><span class="n" style="color: #333;"><span class="idiff">tc_tvs</span></span><span class="idiff right">     </span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3247" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3247

</td>

<td class="diff-line-num new_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3259

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<pre style="margin: 0;"> <span id="LC3259" class="line" lang="haskell">                        <span class="n" style="color: #333;">mkInvisForAllTys</span> <span class="n" style="color: #333;">exp_tvbndrs</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3248" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3248

</td>

<td class="diff-line-num new_line" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3260

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<pre style="margin: 0;"> <span id="LC3260" class="line" lang="haskell">                        <span class="n" style="color: #333;">mkPhiTy</span> <span class="n" style="color: #333;">ctxt</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3249" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3249

</td>

<td class="diff-line-num new_line" data-linenumber="3261" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3261

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3261" class="line" lang="haskell">                        <span class="n" style="color: #333;">mkVisFunTys</span> <span class="n" style="color: #333;">arg_tys</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3250" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3250

</td>

<td class="diff-line-num new_line" data-linenumber="3262" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3262

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3262" class="line" lang="haskell">                        <span class="n" style="color: #333;">unitTy</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3251" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3251

</td>

<td class="diff-line-num new_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3263

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<pre style="margin: 0;"> <span id="LC3263" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- That type is a lie, of course. (It shouldn't end in ()!)</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3252" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3252

</td>

<td class="diff-line-num new_line" data-linenumber="3264" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3264

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3264" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- And we could construct a proper result type from the info</span></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3253" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3253

</td>

<td class="diff-line-num new_line old" data-linenumber="3265" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3253" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- at hand. But the result would mention only the <span class="idiff left right">tmpl</span>_tvs,</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3265" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3265

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3265" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- at hand. But the result would mention only the <span class="idiff left right">univ</span>_tvs,</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3254" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3254

</td>

<td class="diff-line-num new_line" data-linenumber="3266" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3266

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3266" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- and so it just creates more work to do it right. Really,</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3255" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3255

</td>

<td class="diff-line-num new_line" data-linenumber="3267" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3267

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3267" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- we're only doing this to find the right kind variables to</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3256

</td>

<td class="diff-line-num new_line" data-linenumber="3268" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3268

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3268" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- quantify over, and this type is fine for that purpose.</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3257" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3257

</td>

<td class="diff-line-num new_line" data-linenumber="3269" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3269

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3269" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3258" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3258

</td>

<td class="diff-line-num new_line old" data-linenumber="3270" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3258" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- exp_tvs have explicit, user-written binding sites</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3270" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3270

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3270" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- exp_tv<span class="idiff left right">bndr</span>s have explicit, user-written binding sites</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3259

</td>

<td class="diff-line-num new_line" data-linenumber="3271" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3271

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3271" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">-- the kvs below are those kind variables entirely unmentioned by the user</span></span>

</pre>

</td>

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<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3260" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3260

</td>

<td class="diff-line-num new_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3272

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3272" class="line" lang="haskell">         <span class="c1" style="color: #998; font-style: italic;">--   and discovered only by generalization</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3261" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3261

</td>

<td class="diff-line-num new_line" data-linenumber="3273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3273

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3273" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3262" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3262

</td>

<td class="diff-line-num new_line" data-linenumber="3274" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3274

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3274" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">kvs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">kindGeneralizeAll</span> <span class="n" style="color: #333;">fake_ty</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3263

</td>

<td class="diff-line-num new_line" data-linenumber="3275" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3275

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3275" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="3264" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3264

</td>

<td class="diff-line-num new_line old" data-linenumber="3276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3264" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">skol_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">kvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">++</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tmpl_tv</span>s</span></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="3265" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3276" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3276

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3276" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">skol_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">tc_tvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">++</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">kvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">++</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binderVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">exp_tvbndr</span>s</span></span>

</pre>

</td>

</tr>

<tr class="line_holder" id="" style="line-height: 1.6;">

<td class="diff-line-num old_line" data-linenumber="3265" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3265

</td>

<td class="diff-line-num new_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3277

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<pre style="margin: 0;"> <span id="LC3277" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">reportUnsolvedEqualities</span> <span class="n" style="color: #333;">skol_info</span> <span class="n" style="color: #333;">skol_tvs</span> <span class="n" style="color: #333;">tclvl</span> <span class="n" style="color: #333;">wanted</span></span>

</pre>

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3266

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3266" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3267" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3267" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- Zonk to Types</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3268" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3278" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- The skol_info claims that all the variables are bound</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3279" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- by the data constructor decl, whereas actually the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3280" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- univ_tvs are bound by the data type decl itself.  It</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3281" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- would be better to have a doubly-nested implication.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3268" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3282" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- But that just doesn't seem worth it.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3283" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- See test dependent/should_fail/T13780a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3284" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3285" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Zonk to Types</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC3286" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">ze</span><span class="p">,</span> <span class="n" style="color: #333;">qkvs</span><span class="p">)</span>          <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTyBndrs</span> <span class="n" style="color: #333;">kvs</span></span>

</pre>

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3269

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3287

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<pre style="margin: 0;"> <span id="LC3287" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">ze</span><span class="p">,</span> <span class="n" style="color: #333;">user_qtvbndrs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTyVarBindersX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">exp_tvbndrs</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC3288" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">arg_tys</span>             <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkScaledTcTypesToTypesX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">arg_tys</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3272" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3272,15 +3290,14 @@ tcConDecl rep_tycon tag_map tmpl_bndrs res_kind res_tmpl new_or_data</td>

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<pre style="margin: 0;"> <span id="LC3290" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="3291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3291" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Can't print univ_tvs, arg_tys etc, because we are inside the knot here</span></span>

</pre>

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3292

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<pre style="margin: 0;"> <span id="LC3292" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcConDecl 2"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">field_lbls</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC3275" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span></span>

</pre>

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3276

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<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3276" class="line" lang="haskell">           <span class="n" style="color: #333;">univ_tvbs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConInvisTVBinders</span> <span class="n" style="color: #333;">tmpl_bndrs</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3277" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3277

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<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3277" class="line" lang="haskell">           <span class="n" style="color: #333;">univ_tvs</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">univ_tvbs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3278" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3278

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3278" class="line" lang="haskell">           <span class="n" style="color: #333;">ex_tvbs</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTyVarBinders</span> <span class="kt" style="color: #458; font-weight: 600;">InferredSpec</span> <span class="n" style="color: #333;">qkvs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">user_qtvbndrs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3279" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3279

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3279" class="line" lang="haskell">           <span class="n" style="color: #333;">ex_tvs</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">ex_tvbs</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3280

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3280" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- For H98 datatypes, the user-written tyvar binders are precisely</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3281

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3281" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- the universals followed by the existentials.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3282

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3282" class="line" lang="haskell">           <span class="c1" style="color: #998; font-style: italic;">-- See Note [DataCon user type variable binders] in GHC.Core.DataCon.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3283" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3283

</td>

<td class="diff-line-num new_line old" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3283" class="line" lang="haskell">           <span class="n" style="color: #333;">user_tvbs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">univ_tvbs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">ex_tvbs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3293

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<pre style="margin: 0;">+<span id="LC3293" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">univ_tvbs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConInvisTVBinders</span> <span class="n" style="color: #333;">tc_bndrs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3294

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<pre style="margin: 0;">+<span id="LC3294" class="line" lang="haskell">             <span class="n" style="color: #333;">ex_tvbs</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTyVarBinders</span> <span class="kt" style="color: #458; font-weight: 600;">InferredSpec</span> <span class="n" style="color: #333;">qkvs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">user_qtvbndrs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3295

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<pre style="margin: 0;">+<span id="LC3295" class="line" lang="haskell">             <span class="n" style="color: #333;">ex_tvs</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">ex_tvbs</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3296

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<pre style="margin: 0;">+<span id="LC3296" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- For H98 datatypes, the user-written tyvar binders are precisely</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3297

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<pre style="margin: 0;">+<span id="LC3297" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- the universals followed by the existentials.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3298

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<pre style="margin: 0;">+<span id="LC3298" class="line" lang="haskell">                <span class="c1" style="color: #998; font-style: italic;">-- See Note [DataCon user type variable binders] in GHC.Core.DataCon.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3299

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<pre style="margin: 0;">+<span id="LC3299" class="line" lang="haskell">             <span class="n" style="color: #333;">user_tvbs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">univ_tvbs</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">ex_tvbs</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3300

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<pre style="margin: 0;">+<span id="LC3300" class="line" lang="haskell">             <span class="n" style="color: #333;">user_res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkDDHeaderTy</span> <span class="n" style="color: #333;">dd_info</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tc_bndrs</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3284

</td>

<td class="diff-line-num new_line" data-linenumber="3301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3301

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<pre style="margin: 0;"> <span id="LC3301" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3285" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3285

</td>

<td class="diff-line-num new_line" data-linenumber="3302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3302

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<pre style="margin: 0;"> <span id="LC3302" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcConDecl 2"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3286" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3286

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<td class="diff-line-num new_line" data-linenumber="3303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3303

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<pre style="margin: 0;"> <span id="LC3303" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">is_infix</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcConIsInfixH98</span> <span class="n" style="color: #333;">name</span> <span class="n" style="color: #333;">hs_args</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3288,9 +3305,9 @@ tcConDecl rep_tycon tag_map tmpl_bndrs res_kind res_tmpl new_or_data</td>

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<td class="diff-line-num old_line" data-linenumber="3288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3288

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<td class="diff-line-num new_line" data-linenumber="3305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3305

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<pre style="margin: 0;"> <span id="LC3305" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">fam_envs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcGetFamInstEnvs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3289

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<td class="diff-line-num new_line" data-linenumber="3306" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3306

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<pre style="margin: 0;"> <span id="LC3306" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">dc</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">buildDataCon</span> <span class="n" style="color: #333;">fam_envs</span> <span class="n" style="color: #333;">name</span> <span class="n" style="color: #333;">is_infix</span> <span class="n" style="color: #333;">rep_nm</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3290

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<td class="diff-line-num new_line" data-linenumber="3307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3307

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<pre style="margin: 0;"> <span id="LC3307" class="line" lang="haskell">                            <span class="n" style="color: #333;">stricts</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="n" style="color: #333;">field_lbls</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3291

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<td class="diff-line-num new_line old" data-linenumber="3308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3291" class="line" lang="haskell">                            <span class="n" style="color: #333;"><span class="idiff left right">univ</span>_tvs</span> <span class="n" style="color: #333;">ex_tvs</span> <span class="n" style="color: #333;">user_tvbs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3308

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<pre style="margin: 0;">+<span id="LC3308" class="line" lang="haskell">                            <span class="n" style="color: #333;"><span class="idiff left right">tc</span>_tvs</span> <span class="n" style="color: #333;">ex_tvs</span> <span class="n" style="color: #333;">user_tvbs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3292

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<td class="diff-line-num new_line" data-linenumber="3309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3309

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<pre style="margin: 0;"> <span id="LC3309" class="line" lang="haskell">                            <span class="p">[</span><span class="cm" style="color: #998; font-style: italic;">{- no eq_preds -}</span><span class="p">]</span> <span class="n" style="color: #333;">ctxt</span> <span class="n" style="color: #333;">arg_tys</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3293

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<td class="diff-line-num new_line old" data-linenumber="3310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3293" class="line" lang="haskell">                            <span class="n" style="color: #333;"><span class="idiff left right">res_tmpl</span></span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tag_map</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3310

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<pre style="margin: 0;">+<span id="LC3310" class="line" lang="haskell">                            <span class="n" style="color: #333;"><span class="idiff left right">user_res_ty</span></span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tag_map</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3294

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<td class="diff-line-num new_line" data-linenumber="3311" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3311

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<pre style="margin: 0;"> <span id="LC3311" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- NB:  we put data_tc, the type constructor gotten from the</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3295

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<td class="diff-line-num new_line" data-linenumber="3312" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3312

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<pre style="margin: 0;"> <span id="LC3312" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">--      constructor type signature into the data constructor;</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3296

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<td class="diff-line-num new_line" data-linenumber="3313" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3313

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<pre style="margin: 0;"> <span id="LC3313" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">--      that way checkValidDataCon can complain if it's wrong.</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3316" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3299,14 +3316,14 @@ tcConDecl rep_tycon tag_map tmpl_bndrs res_kind res_tmpl new_or_data</td>

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<td class="diff-line-num old_line" data-linenumber="3299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3299

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<td class="diff-line-num new_line" data-linenumber="3316" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3316

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<pre style="margin: 0;"> <span id="LC3316" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3300

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<td class="diff-line-num new_line" data-linenumber="3317" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3317

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<pre style="margin: 0;"> <span id="LC3317" class="line" lang="haskell">    <span class="n" style="color: #333;">skol_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DataConSkol</span> <span class="n" style="color: #333;">name</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3301

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<td class="diff-line-num new_line" data-linenumber="3318" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3318

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<pre style="margin: 0;"> <span id="LC3318" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3302

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<td class="diff-line-num new_line old" data-linenumber="3319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3302" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;"><span class="idiff left">rep_tycon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tag_map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tmpl_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">_res_kind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">res_tmpl</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">new_or_data</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3319

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<pre style="margin: 0;">+<span id="LC3319" class="line" lang="haskell"><span class="n" style="color: #333;">tcConDecl</span> <span class="n" style="color: #333;"><span class="idiff left">new_or_data</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dd_info</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rep_tycon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tc_bndrs</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">_res_kind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tag_map</span></span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3303

</td>

<td class="diff-line-num new_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3320

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<pre style="margin: 0;"> <span id="LC3320" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- NB: don't use res_kind here, as it's ill-scoped. Instead,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3304" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3304

</td>

<td class="diff-line-num new_line" data-linenumber="3321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3321

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<pre style="margin: 0;"> <span id="LC3321" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- we get the res_kind by typechecking the result type.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3305

</td>

<td class="diff-line-num new_line" data-linenumber="3322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3322

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<pre style="margin: 0;"> <span id="LC3322" class="line" lang="haskell">          <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConDeclGADT</span> <span class="p">{</span> <span class="n" style="color: #333;">con_names</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">names</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3306" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3306

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<td class="diff-line-num new_line" data-linenumber="3323" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3323

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<pre style="margin: 0;"> <span id="LC3323" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">con_bndrs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">outer_hs_bndrs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3307

</td>

<td class="diff-line-num new_line" data-linenumber="3324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3324

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<pre style="margin: 0;"> <span id="LC3324" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">con_mb_cxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cxt</span><span class="p">,</span> <span class="n" style="color: #333;">con_g_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_args</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3308

</td>

<td class="diff-line-num new_line" data-linenumber="3325" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3325

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<pre style="margin: 0;"> <span id="LC3325" class="line" lang="haskell">                       <span class="p">,</span> <span class="n" style="color: #333;">con_res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hs_res_ty</span> <span class="p">})</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3309

</td>

<td class="diff-line-num new_line old" data-linenumber="3326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3309" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt<span class="idiff left right">Name</span></span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3326" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3326

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<pre style="margin: 0;">+<span id="LC3326" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3310

</td>

<td class="diff-line-num new_line" data-linenumber="3327" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3327

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<pre style="margin: 0;"> <span id="LC3327" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcConDecl 1 gadt"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">names</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3311" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3311

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<td class="diff-line-num new_line" data-linenumber="3328" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3328

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<pre style="margin: 0;"> <span id="LC3328" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">names</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3312" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3312

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<td class="diff-line-num new_line" data-linenumber="3329" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3329

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<pre style="margin: 0;"> <span id="LC3329" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3317" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3334" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3317,10 +3334,23 @@ tcConDecl rep_tycon tag_map tmpl_bndrs _res_kind res_tmpl new_or_data</td>

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3317

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<td class="diff-line-num new_line" data-linenumber="3334" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3334

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<pre style="margin: 0;"> <span id="LC3334" class="line" lang="haskell">                 <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">res_ty</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcInferLHsTypeKind</span> <span class="n" style="color: #333;">hs_res_ty</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3318" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3318

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<td class="diff-line-num new_line" data-linenumber="3335" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3335

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<pre style="margin: 0;"> <span id="LC3335" class="line" lang="haskell">                         <span class="c1" style="color: #998; font-style: italic;">-- See Note [GADT return kinds]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3319" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3319

</td>

<td class="diff-line-num new_line" data-linenumber="3336" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3336

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<pre style="margin: 0;"> <span id="LC3336" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3337" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3337

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<pre style="margin: 0;">+<span id="LC3337" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- For data instances (only), ensure that the return type,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3338" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3338

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<pre style="margin: 0;">+<span id="LC3338" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- res_ty, is a substitution instance of the header.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3339" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3339

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<pre style="margin: 0;">+<span id="LC3339" class="line" lang="haskell">                 <span class="c1" style="color: #998; font-style: italic;">-- See Note [GADT return types]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3340" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3340

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<pre style="margin: 0;">+<span id="LC3340" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dd_info</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3341" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3341

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<pre style="margin: 0;">+<span id="LC3341" class="line" lang="haskell">                      <span class="kt" style="color: #458; font-weight: 600;">DDataType</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3342" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3342

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<pre style="margin: 0;">+<span id="LC3342" class="line" lang="haskell">                      <span class="kt" style="color: #458; font-weight: 600;">DDataInstance</span> <span class="n" style="color: #333;">hdr_ty</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3343" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3343

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<pre style="margin: 0;">+<span id="LC3343" class="line" lang="haskell">                        <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">subst</span><span class="p">,</span> <span class="n" style="color: #333;">_meta_tvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newMetaTyVars</span> <span class="p">(</span><span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">tc_bndrs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3344" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3344

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<pre style="margin: 0;">+<span id="LC3344" class="line" lang="haskell">                           <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">head_shape</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">hdr_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3345

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<pre style="margin: 0;">+<span id="LC3345" class="line" lang="haskell">                           <span class="p">;</span> <span class="n" style="color: #333;">discardResult</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3346" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3346

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<pre style="margin: 0;">+<span id="LC3346" class="line" lang="haskell">                             <span class="n" style="color: #333;">popErrCtxt</span> <span class="o" style="font-weight: 600;">$</span>  <span class="c1" style="color: #998; font-style: italic;">-- Drop dataConCtxt</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3347

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<pre style="margin: 0;">+<span id="LC3347" class="line" lang="haskell">                             <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConResCtxt</span> <span class="n" style="color: #333;">names</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3348" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3348

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<pre style="margin: 0;">+<span id="LC3348" class="line" lang="haskell">                             <span class="n" style="color: #333;">unifyType</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="n" style="color: #333;">res_ty</span> <span class="n" style="color: #333;">head_shape</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3349

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3349" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3320" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3320

</td>

<td class="diff-line-num new_line" data-linenumber="3350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3350

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<pre style="margin: 0;"> <span id="LC3350" class="line" lang="haskell">                   <span class="c1" style="color: #998; font-style: italic;">-- See Note [Datatype return kinds]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3321" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3321

</td>

<td class="diff-line-num new_line" data-linenumber="3351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3351

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<pre style="margin: 0;"> <span id="LC3351" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">exp_kind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">getArgExpKind</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">res_kind</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3322" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3322

</td>

<td class="diff-line-num new_line old" data-linenumber="3352" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3322" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3323" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3323

</td>

<td class="diff-line-num new_line" data-linenumber="3352" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3352

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<pre style="margin: 0;"> <span id="LC3352" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">btys</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcConGADTArgs</span> <span class="n" style="color: #333;">exp_kind</span> <span class="n" style="color: #333;">hs_args</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3353" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3353

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3353" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3324" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3324

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<td class="diff-line-num new_line" data-linenumber="3354" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3354

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<pre style="margin: 0;"> <span id="LC3354" class="line" lang="haskell">                 <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">stricts</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unzip</span> <span class="n" style="color: #333;">btys</span></span>

</pre>

</td>

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3325

</td>

<td class="diff-line-num new_line" data-linenumber="3355" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3355

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<pre style="margin: 0;"> <span id="LC3355" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">field_lbls</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupConstructorFields</span> <span class="n" style="color: #333;">name</span></span>

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3326

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<td class="diff-line-num new_line" data-linenumber="3356" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3356

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<pre style="margin: 0;"> <span id="LC3356" class="line" lang="haskell">                 <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ctxt</span><span class="p">,</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">,</span> <span class="n" style="color: #333;">res_ty</span><span class="p">,</span> <span class="n" style="color: #333;">field_lbls</span><span class="p">,</span> <span class="n" style="color: #333;">stricts</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3343" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3373" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3343,9 +3373,10 @@ tcConDecl rep_tycon tag_map tmpl_bndrs _res_kind res_tmpl new_or_data</td>

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3343

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3373

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<pre style="margin: 0;"> <span id="LC3373" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">ctxt</span>          <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypesToTypesX</span> <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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3344

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<td class="diff-line-num new_line" data-linenumber="3374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3374

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<pre style="margin: 0;"> <span id="LC3374" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">res_ty</span>        <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span>   <span class="n" style="color: #333;">ze</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3345" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3345

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<td class="diff-line-num new_line" data-linenumber="3375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3375

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<pre style="margin: 0;"> <span id="LC3375" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3346" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3346

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<td class="diff-line-num new_line old" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3346" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">univ_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">ex_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">tvbndrs'</span><span class="p">,</span> <span class="n" style="color: #333;">eq_preds</span><span class="p">,</span> <span class="n" style="color: #333;">arg_subst</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3347" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3347

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<td class="diff-line-num new_line old" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3347" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rejigConRes</span> <span class="n" style="color: #333;">tmpl_bndrs</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">tvbndrs</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3348" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3348

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<td class="diff-line-num new_line old" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3348" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- See Note [Checking GADT return types]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3376

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<pre style="margin: 0;">+<span id="LC3376" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkDDHeaderTy</span> <span class="n" style="color: #333;">dd_info</span> <span class="n" style="color: #333;">rep_tycon</span> <span class="n" style="color: #333;">tc_bndrs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3377

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<pre style="margin: 0;">+<span id="LC3377" class="line" lang="haskell">             <span class="p">(</span><span class="n" style="color: #333;">univ_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">ex_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">tvbndrs'</span><span class="p">,</span> <span class="n" style="color: #333;">eq_preds</span><span class="p">,</span> <span class="n" style="color: #333;">arg_subst</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3378" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3378

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<pre style="margin: 0;">+<span id="LC3378" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rejigConRes</span> <span class="n" style="color: #333;">tc_bndrs</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">tvbndrs</span> <span class="n" style="color: #333;">res_ty</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3349" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3379

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<pre style="margin: 0;">+<span id="LC3379" class="line" lang="haskell">             <span class="c1" style="color: #998; font-style: italic;">-- See Note [rejigConRes]</span></span>

</pre>

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3349

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<td class="diff-line-num new_line" data-linenumber="3380" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3380

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<pre style="margin: 0;"> <span id="LC3380" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3350" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3350

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<td class="diff-line-num new_line" data-linenumber="3381" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3381

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<pre style="margin: 0;"> <span id="LC3381" class="line" lang="haskell">             <span class="n" style="color: #333;">ctxt'</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTys</span> <span class="n" style="color: #333;">arg_subst</span> <span class="n" style="color: #333;">ctxt</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3351" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3351

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<td class="diff-line-num new_line" data-linenumber="3382" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3382

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<pre style="margin: 0;"> <span id="LC3382" class="line" lang="haskell">             <span class="n" style="color: #333;">arg_tys'</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substScaledTys</span> <span class="n" style="color: #333;">arg_subst</span> <span class="n" style="color: #333;">arg_tys</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3372,8 +3403,73 @@ tcConDecl rep_tycon tag_map tmpl_bndrs _res_kind res_tmpl new_or_data</td>

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3372

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<td class="diff-line-num new_line" data-linenumber="3403" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3403

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<pre style="margin: 0;"> <span id="LC3403" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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3373

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<td class="diff-line-num new_line" data-linenumber="3404" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3404

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<pre style="margin: 0;"> <span id="LC3404" class="line" lang="haskell">    <span class="n" style="color: #333;">skol_info</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DataConSkol</span> <span class="p">(</span><span class="n" style="color: #333;">unLoc</span> <span class="p">(</span><span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">names</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3374" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3374

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<td class="diff-line-num new_line" data-linenumber="3405" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3405

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3405" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3375

</td>

<td class="diff-line-num new_line old" data-linenumber="3406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3375" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [GADT return <span class="idiff left right">kind</span>s]</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3406" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3406

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<pre style="margin: 0;">+<span id="LC3406" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [GADT return <span class="idiff left right">type</span>s]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3376" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3376

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<td class="diff-line-num new_line" data-linenumber="3407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3407

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<pre style="margin: 0;"> <span id="LC3407" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3408" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3408

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC3408" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3409" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3409

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<pre style="margin: 0;">+<span id="LC3409" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data family T :: forall k. k -> Type</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="3410" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3410

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<pre style="margin: 0;">+<span id="LC3410" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data instance T (a :: Type) where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3411" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3411

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<pre style="margin: 0;">+<span id="LC3411" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    MkT :: forall b. T b</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3412" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3412

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<pre style="margin: 0;">+<span id="LC3412" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3413" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3413

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<pre style="margin: 0;">+<span id="LC3413" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">What kind does `b` have in the signature for MkT?</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3414" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3414

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<pre style="margin: 0;">+<span id="LC3414" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Since the return type must be an instance of the type in the header,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3415" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3415

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<pre style="margin: 0;">+<span id="LC3415" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">we must have (b :: Type), but you can't tell that by looking only at</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3416" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3416

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<pre style="margin: 0;">+<span id="LC3416" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the type of the data constructor; you have to look at the header too.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3417" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3417

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<pre style="margin: 0;">+<span id="LC3417" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">If you wrote it out fully, it'd look like</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3418" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3418

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<pre style="margin: 0;">+<span id="LC3418" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data instance T @Type (a :: Type) where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3419" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3419

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<pre style="margin: 0;">+<span id="LC3419" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    MkT :: forall (b::Type). T @Type b</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3420" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3420

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<pre style="margin: 0;">+<span id="LC3420" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3421" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3421

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<pre style="margin: 0;">+<span id="LC3421" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We could reject the program, and expect the user to add kind</span></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="3422" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3422

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<pre style="margin: 0;">+<span id="LC3422" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">annotations to `MkT` to restrict the signature.  But an easy and</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3423" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3423" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">helpful alternative is this: simply instantiate the type from the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3424" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3424

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<pre style="margin: 0;">+<span id="LC3424" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">header with fresh unification variables, and unify with the return</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3425" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3425" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">type of `MkT`. That will force `b` to have kind `Type`.  See #8707</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3426" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3426" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">and #14111.</span></span>

</pre>

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3427

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<pre style="margin: 0;">+<span id="LC3427" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3428" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Wrikles</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3429" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3429" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* At first sight it looks as though this would completely subsume the</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3430" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  return-type check in checkValidDataCon.  But it does not. Suppose we</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3431" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3431

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<pre style="margin: 0;">+<span id="LC3431" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  have</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3432" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data instance T [a] where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3433" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">        MkT :: T (F (Maybe a))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3434" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3434

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<pre style="margin: 0;">+<span id="LC3434" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3435" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3435" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  where F is a type function.  Then maybe (F (Maybe a)) evaluates to</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3436" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3436" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  [a], so unifyType will succeed.  But we discard the coercion</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3437" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3437" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  returned by unifyType; and we really don't want to accept this</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3438" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3438

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<pre style="margin: 0;">+<span id="LC3438" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  program.  The check in checkValidDataCon will, however, reject it.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3439" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3439" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  TL;DR: keep the check in checkValidDataCon.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3440" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3440

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<pre style="margin: 0;">+<span id="LC3440" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3441" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3441" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Consider a data type, rather than a data instance, declaration</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3442" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data S a where { MkS :: b -> S [b]  }</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3443" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3443" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  In tcConDecl, S is knot-tied, so we don't want to unify (S alpha)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3444" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3444" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  with (S [b]). To put it another way, unifyType should never see a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3445" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3445

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<pre style="margin: 0;">+<span id="LC3445" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  TcTycon.  Simple solution: do *not* do the extra unifyType for</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3446" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3446

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<pre style="margin: 0;">+<span id="LC3446" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data types (DDataType) only for data instances (DDataInstance); in</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3447" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3447

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<pre style="margin: 0;">+<span id="LC3447" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  the latter the family constructor is not knot-tied so there is no</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3448" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3448

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<pre style="margin: 0;">+<span id="LC3448" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  problem.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3449" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3449

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<pre style="margin: 0;">+<span id="LC3449" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3450" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3450

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<pre style="margin: 0;">+<span id="LC3450" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Consider this (from an earlier form of GHC itself):</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3451" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3451

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<pre style="margin: 0;">+<span id="LC3451" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3452" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3452

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<pre style="margin: 0;">+<span id="LC3452" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data Pass = Parsed | ...</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3453" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3453

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<pre style="margin: 0;">+<span id="LC3453" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     data GhcPass (c :: Pass) where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3454" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3454

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<pre style="margin: 0;">+<span id="LC3454" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       GhcPs :: GhcPs</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3455" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3455

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<pre style="margin: 0;">+<span id="LC3455" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       ...</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3456" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3456

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<pre style="margin: 0;">+<span id="LC3456" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     type GhcPs   = GhcPass 'Parsed</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3457" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3457

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<pre style="margin: 0;">+<span id="LC3457" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3458" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3458

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<pre style="margin: 0;">+<span id="LC3458" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   Now GhcPs and GhcPass are mutually recursive. If we did unifyType</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3459" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3459

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<pre style="margin: 0;">+<span id="LC3459" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   for datatypes like GhcPass, we would not be able to expand the type</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3460" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3460" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   synonym (it'd still be a TcTyCon).  So again, we don't do unifyType</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3461" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3461

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<pre style="margin: 0;">+<span id="LC3461" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   for data types; we leave it to checkValidDataCon.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="3462" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3462

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<pre style="margin: 0;">+<span id="LC3462" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3463" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3463

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<pre style="margin: 0;">+<span id="LC3463" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   We /do/ perform the unifyType for data /instances/, but a data</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3464" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3464

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<pre style="margin: 0;">+<span id="LC3464" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   instance doesn't declare a new (user-visible) type constructor, so</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3465" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3465

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<pre style="margin: 0;">+<span id="LC3465" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   there is no mutual recursion with type synonyms to worry about.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3466" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3466

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<pre style="margin: 0;">+<span id="LC3466" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   All good.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3467" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3467

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<pre style="margin: 0;">+<span id="LC3467" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3468" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3468

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<pre style="margin: 0;">+<span id="LC3468" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   TL;DR we do support mutual recursion between type synonyms and</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3469" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3469

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<pre style="margin: 0;">+<span id="LC3469" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data type/instance declarations, as above.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3470" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3470

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<pre style="margin: 0;">+<span id="LC3470" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3471" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3471

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<pre style="margin: 0;">+<span id="LC3471" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [GADT return kinds]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3472" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3472

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<pre style="margin: 0;">+<span id="LC3472" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3377" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3377

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<td class="diff-line-num new_line" data-linenumber="3473" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3473

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<pre style="margin: 0;"> <span id="LC3473" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3378" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3378

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<td class="diff-line-num new_line" data-linenumber="3474" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3474

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<pre style="margin: 0;"> <span id="LC3474" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   type family Star where Star = Type</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3379" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3379

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<td class="diff-line-num new_line" data-linenumber="3475" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3475

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<pre style="margin: 0;"> <span id="LC3475" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data T :: Type where</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3496,8 +3592,8 @@ For example:</td>

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3496

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<td class="diff-line-num new_line" data-linenumber="3592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3592

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<pre style="margin: 0;"> <span id="LC3592" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     (:--:) :: t1 -> t2 -> T Int</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3497" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3497

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<td class="diff-line-num new_line" data-linenumber="3593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3593

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<pre style="margin: 0;"> <span id="LC3593" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3498

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<td class="diff-line-num new_line" data-linenumber="3594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3594

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3594" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="3499" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3499

</td>

<td class="diff-line-num new_line old" data-linenumber="3595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3499" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [<span class="idiff left right">Checking GADT return typ</span>es]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3500

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<td class="diff-line-num new_line old" data-linenumber="3595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3500" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~<span class="idiff left right">~~~~~~~~~~~~~~~</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3595" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [<span class="idiff left right">rejigConR</span>es]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3596" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3596

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<pre style="margin: 0;">+<span id="LC3596" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3501

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<td class="diff-line-num new_line" data-linenumber="3597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3597

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<pre style="margin: 0;"> <span id="LC3597" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There is a delicacy around checking the return types of a datacon. The</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3502" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3502

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<td class="diff-line-num new_line" data-linenumber="3598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3598

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<pre style="margin: 0;"> <span id="LC3598" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">central problem is dealing with a declaration like</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3503" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3503

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<td class="diff-line-num new_line" data-linenumber="3599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3599

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<pre style="margin: 0;"> <span id="LC3599" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3532,9 +3628,9 @@ errors reported in one pass.  See #7175, and #10836.</td>

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<td class="diff-line-num old_line" data-linenumber="3532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3532

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3628

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<pre style="margin: 0;"> <span id="LC3628" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      TI :: forall b1 c1. (b1 ~ c1) => b1 -> :R7T b1 c1</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3533

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<td class="diff-line-num new_line" data-linenumber="3629" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3629

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<pre style="margin: 0;"> <span id="LC3629" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- In this case orig_res_ty = T (e,e)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3534" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3534

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<td class="diff-line-num new_line" data-linenumber="3630" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3630

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<pre style="margin: 0;"> <span id="LC3630" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3535

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<td class="diff-line-num new_line old" data-linenumber="3631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3535" class="line" lang="haskell"><span class="n" style="color: #333;">rejigConRes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">KnotTied</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Type</span></span><span class="idiff right">   </span> <span class="c1" style="color: #998; font-style: italic;">-- Template for result type; e.g.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3536

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<td class="diff-line-num new_line old" data-linenumber="3631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3536" class="line" lang="haskell">            <span class="idiff left right">           </span>           <span class="c1" style="color: #998; font-style: italic;">-- data instance T [a] b c ...</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3537

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<td class="diff-line-num new_line old" data-linenumber="3631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3537" class="line" lang="haskell">                                  <span class="c1" style="color: #998; font-style: italic;">--      gives template ([a,b,c], T [a] b c)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3631

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<pre style="margin: 0;">+<span id="LC3631" class="line" lang="haskell"><span class="n" style="color: #333;">rejigConRes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">TyConBinder</span><span class="p">]</span>  <span class="c1" style="color: #998; font-style: italic;">-- Template for result type; e.g.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="3632" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3632" class="line" lang="haskell">            <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">KnotTied</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Type</span></span>           <span class="c1" style="color: #998; font-style: italic;">-- data instance T [a] b c ...</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3633" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3633

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<pre style="margin: 0;">+<span id="LC3633" class="line" lang="haskell">                                  <span class="idiff left right">     </span><span class="c1" style="color: #998; font-style: italic;">--      gives template ([a,b,c], T [a] b c)</span></span>

</pre>

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3538

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<td class="diff-line-num new_line" data-linenumber="3634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3634

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<pre style="margin: 0;"> <span id="LC3634" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">InvisTVBinder</span><span class="p">]</span>    <span class="c1" style="color: #998; font-style: italic;">-- The constructor's type variables (both inferred and user-written)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3539

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<td class="diff-line-num new_line" data-linenumber="3635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3635

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<pre style="margin: 0;"> <span id="LC3635" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">KnotTied</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>      <span class="c1" style="color: #998; font-style: italic;">-- res_ty</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3540" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3540

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<td class="diff-line-num new_line" data-linenumber="3636" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3636

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<pre style="margin: 0;"> <span id="LC3636" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">],</span>          <span class="c1" style="color: #998; font-style: italic;">-- Universal</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3546" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3642" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3546,10 +3642,10 @@ rejigConRes :: [KnotTied TyConBinder] -> KnotTied Type    -- Template for result</td>

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<pre style="margin: 0;"> <span id="LC3642" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- We don't check that the TyCon given in the ResTy is</span></span>

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<pre style="margin: 0;"> <span id="LC3643" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- the same as the parent tycon, because checkValidDataCon will do it</span></span>

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<pre style="margin: 0;"> <span id="LC3644" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NB: All arguments may potentially be knot-tied</span></span>

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<pre style="margin: 0;">-<span id="LC3549" class="line" lang="haskell"><span class="n" style="color: #333;">rejigConRes</span> <span class="n" style="color: #333;">t<span class="idiff left right">mpl_</span>bndrs</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">dc_tvbndrs</span> <span class="n" style="color: #333;">res_ty</span></span>

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<pre style="margin: 0;">+<span id="LC3645" class="line" lang="haskell"><span class="n" style="color: #333;">rejigConRes</span> <span class="n" style="color: #333;">t<span class="idiff left right">c_tv</span>bndrs</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">dc_tvbndrs</span> <span class="n" style="color: #333;">res_ty</span></span>

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<pre style="margin: 0;"> <span id="LC3646" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- E.g.  data T [a] b c where</span></span>

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<pre style="margin: 0;"> <span id="LC3647" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--         MkT :: forall x y z. T [(x,y)] z z</span></span>

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<pre style="margin: 0;">-<span id="LC3552" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- The {a,b,c} are the t<span class="idiff left right">mpl</span>_tvs, and the {x,y,z} are the dc_tvs</span></span>

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<pre style="margin: 0;">+<span id="LC3648" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- The {a,b,c} are the t<span class="idiff left right">c</span>_tvs, and the {x,y,z} are the dc_tvs</span></span>

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<pre style="margin: 0;"> <span id="LC3649" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--     (NB: unlike the H98 case, the dc_tvs are not all existential)</span></span>

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<pre style="margin: 0;"> <span id="LC3650" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Then we generate</span></span>

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<pre style="margin: 0;"> <span id="LC3651" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      Univ tyvars     Eq-spec</span></span>

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<pre style="margin: 0;"> <span id="LC3660" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--              , [], [x,y,z]</span></span>

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<pre style="margin: 0;"> <span id="LC3661" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--              , [a~(x,y),b~z], <arg-subst> )</span></span>

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<pre style="margin: 0;"> <span id="LC3662" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">subst</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcMatchTy</span> <span class="n" style="color: #333;">res_tmpl</span> <span class="n" style="color: #333;">res_ty</span></span>

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<pre style="margin: 0;">-<span id="LC3567" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">univ_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">raw_eqs</span><span class="p">,</span> <span class="n" style="color: #333;">kind_subst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkGADTVars</span> <span class="n" style="color: #333;">t<span class="idiff left right">mpl</span>_tvs</span> <span class="n" style="color: #333;">dc_tvs</span> <span class="n" style="color: #333;">subst</span></span>

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<pre style="margin: 0;">+<span id="LC3663" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">univ_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">raw_eqs</span><span class="p">,</span> <span class="n" style="color: #333;">kind_subst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkGADTVars</span> <span class="n" style="color: #333;">t<span class="idiff left right">c</span>_tvs</span> <span class="n" style="color: #333;">dc_tvs</span> <span class="n" style="color: #333;">subst</span></span>

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<td class="diff-line-num new_line" data-linenumber="3664" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3664" class="line" lang="haskell">        <span class="n" style="color: #333;">raw_ex_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dc_tvs</span> <span class="p">`</span><span class="n" style="color: #333;">minusList</span><span class="p">`</span> <span class="n" style="color: #333;">univ_tvs</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="3665" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3665" class="line" lang="haskell">        <span class="p">(</span><span class="n" style="color: #333;">arg_subst</span><span class="p">,</span> <span class="n" style="color: #333;">substed_ex_tvs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTyVarBndrs</span> <span class="n" style="color: #333;">kind_subst</span> <span class="n" style="color: #333;">raw_ex_tvs</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="3666" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3666" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3686" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3590,11 +3686,11 @@ rejigConRes tmpl_bndrs res_tmpl dc_tvbndrs res_ty</td>

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<pre style="margin: 0;"> <span id="LC3686" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- we must do *something*, not just crash.  So we do something simple</span></span>

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<pre style="margin: 0;"> <span id="LC3687" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- albeit bogus, relying on checkValidDataCon to check the</span></span>

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<td class="diff-line-num new_line" data-linenumber="3688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3688" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--  bad-result-type error before seeing that the other fields look odd</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="3689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3593" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [<span class="idiff left right">Checking GADT return typ</span>es]</span></span>

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<td class="diff-line-num old old_line" data-linenumber="3594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="3689" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3594" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">t<span class="idiff left">mpl_tvs</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dc_tvs</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">minusList</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tmpl</span>_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">dc_tvbndrs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">emptyTCvSubst</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC3689" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [<span class="idiff left right">rejigConR</span>es]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3690" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3690" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">t<span class="idiff left">c_tvs</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dc_tvs</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">minusList</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tc</span>_tvs</span><span class="p">,</span> <span class="n" style="color: #333;">dc_tvbndrs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">emptyTCvSubst</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="3691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC3691" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC3596" class="line" lang="haskell">    <span class="n" style="color: #333;">dc_tvs</span> <span class="idiff left right">  </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">dc_tvbndrs</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC3597" class="line" lang="haskell">    <span class="n" style="color: #333;">t<span class="idiff left">mpl_tvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binderVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tmpl_</span>bndrs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3692" class="line" lang="haskell">    <span class="n" style="color: #333;">dc_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binderVars</span> <span class="n" style="color: #333;">dc_tvbndrs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC3693" class="line" lang="haskell">    <span class="n" style="color: #333;">t<span class="idiff left">c_tvs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">binderVars</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">tc_tv</span>bndrs</span></span>

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<td class="diff-line-num old_line" data-linenumber="3598" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3598

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<td class="diff-line-num new_line" data-linenumber="3694" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3694

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<pre style="margin: 0;"> <span id="LC3694" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3599" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3599

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<td class="diff-line-num new_line" data-linenumber="3695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3695

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<pre style="margin: 0;"> <span id="LC3695" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [mkGADTVars]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3600" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3600

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<td class="diff-line-num new_line" data-linenumber="3696" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3696

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<pre style="margin: 0;"> <span id="LC3696" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3634,7 +3730,7 @@ becomes</td>

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<td class="diff-line-num old_line" data-linenumber="3634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3634

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<td class="diff-line-num new_line" data-linenumber="3730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3730

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<pre style="margin: 0;"> <span id="LC3730" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3635

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<td class="diff-line-num new_line" data-linenumber="3731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3731

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<pre style="margin: 0;"> <span id="LC3731" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We start off by matching (T k1 k2 a b) with (T x1 * (Proxy x1 y, z) z). We</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3636" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3636

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<td class="diff-line-num new_line" data-linenumber="3732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3732

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<pre style="margin: 0;"> <span id="LC3732" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">know this match will succeed because of the validity check (actually done</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3637" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="3733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC3637" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">later, but laziness saves us -- see Note [<span class="idiff left right">Checking GADT return typ</span>es]).</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="3638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="3733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC3733" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">later, but laziness saves us -- see Note [<span class="idiff left right">rejigConR</span>es]).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="3638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3638

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<td class="diff-line-num new_line" data-linenumber="3734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3734

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<pre style="margin: 0;"> <span id="LC3734" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Thus, we get</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3639" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3639

</td>

<td class="diff-line-num new_line" data-linenumber="3735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3735

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC3735" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="3640" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3640

</td>

<td class="diff-line-num new_line" data-linenumber="3736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3736

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<pre style="margin: 0;"> <span id="LC3736" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  subst := { k1 |-> x1, k2 |-> *, a |-> (Proxy x1 y, z), b |-> z }</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="4177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4081,15 +4177,9 @@ checkFieldCompat fld con1 con2 res1 res2 fty1 fty2</td>

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<td class="diff-line-num old_line" data-linenumber="4081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4081

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<td class="diff-line-num new_line" data-linenumber="4177" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4177

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<pre style="margin: 0;"> <span id="LC4177" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-------------------------------</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4082

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<td class="diff-line-num new_line" data-linenumber="4178" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4178

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<pre style="margin: 0;"> <span id="LC4178" class="line" lang="haskell"><span class="n" style="color: #333;">checkValidDataCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4083

</td>

<td class="diff-line-num new_line" data-linenumber="4179" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4179

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<pre style="margin: 0;"> <span id="LC4179" class="line" lang="haskell"><span class="n" style="color: #333;">checkValidDataCon</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">existential_ok</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">con</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4084

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4084" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="p">(</span><span class="n" style="color: #333;">getSrcSpan</span> <span class="n" style="color: #333;">con</span><span class="p">)</span>  <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="4085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4085

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4085" class="line" lang="haskell">    <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="n" style="color: #333;">con</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="4086" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4086

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4086" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- Check that the return type of the data constructor</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4087" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4087

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4087" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- matches the type constructor; eg reject this:</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="4088" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4088

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC4088" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--   data T a where { MkT :: Bogus a }</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4089" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4089

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC4089" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- It's important to do this first:</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="4090" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4090

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4090" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--  see Note [Checking GADT return types]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4091" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4091

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4091" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">--  and c.f. Note [Check role annotations in a second pass]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4092" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4092

</td>

<td class="diff-line-num new_line old" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4092" class="line" lang="haskell">          <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">tc_tvs</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4180" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4180

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<pre style="margin: 0;">+<span id="LC4180" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setSrcSpan</span> <span class="n" style="color: #333;">con_loc</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4181" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4181

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<pre style="margin: 0;">+<span id="LC4181" class="line" lang="haskell">    <span class="n" style="color: #333;">addErrCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConCtxt</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">con_loc</span> <span class="n" style="color: #333;">con_name</span><span class="p">])</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4182" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4182

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<pre style="margin: 0;">+<span id="LC4182" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">tc_tvs</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConTyVars</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4093

</td>

<td class="diff-line-num new_line" data-linenumber="4183" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4183

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<pre style="margin: 0;"> <span id="LC4183" class="line" lang="haskell">              <span class="n" style="color: #333;">res_ty_tmpl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkFamilyTyConApp</span> <span class="n" style="color: #333;">tc</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTys</span> <span class="n" style="color: #333;">tc_tvs</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4094" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4094

</td>

<td class="diff-line-num new_line" data-linenumber="4184" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4184

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<pre style="margin: 0;"> <span id="LC4184" class="line" lang="haskell">              <span class="n" style="color: #333;">orig_res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConOrigResTy</span> <span class="n" style="color: #333;">con</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4095" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4095

</td>

<td class="diff-line-num new_line" data-linenumber="4185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4185

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<pre style="margin: 0;"> <span id="LC4185" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"checkValidDataCon"</span> <span class="p">(</span><span class="n" style="color: #333;">vcat</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="4188" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4098,6 +4188,18 @@ checkValidDataCon dflags existential_ok tc con</td>

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<td class="diff-line-num old_line" data-linenumber="4098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4098

</td>

<td class="diff-line-num new_line" data-linenumber="4188" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4188

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<pre style="margin: 0;"> <span id="LC4188" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">orig_res_ty</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tcTypeKind</span> <span class="n" style="color: #333;">orig_res_ty</span><span class="p">)])</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4099" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4099

</td>

<td class="diff-line-num new_line" data-linenumber="4189" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4189

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<pre style="margin: 0;"> <span id="LC4189" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="4100" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4100

</td>

<td class="diff-line-num new_line" data-linenumber="4190" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4190

</td>

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<pre style="margin: 0;"> <span id="LC4190" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4191

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<pre style="margin: 0;">+<span id="LC4191" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Check that the return type of the data constructor</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4192

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<pre style="margin: 0;">+<span id="LC4192" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- matches the type constructor; eg reject this:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4193

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<pre style="margin: 0;">+<span id="LC4193" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--   data T a where { MkT :: Bogus a }</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4194

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<pre style="margin: 0;">+<span id="LC4194" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- It's important to do this first:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4195

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<pre style="margin: 0;">+<span id="LC4195" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--  see Note [rejigCon</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4196

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<pre style="margin: 0;">+<span id="LC4196" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--  and c.f. Note [Check role annotations in a second pass]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4197

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<pre style="margin: 0;">+<span id="LC4197" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4198

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<pre style="margin: 0;">+<span id="LC4198" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Check that the return type of the data constructor is an instance</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4199

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<pre style="margin: 0;">+<span id="LC4199" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- of the header of the header of data decl.  This checks for</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4200" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4200

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<pre style="margin: 0;">+<span id="LC4200" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      data T a where { MkT :: S a }</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4201

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<pre style="margin: 0;">+<span id="LC4201" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">--      data instance D [a] where { MkD :: D (Maybe b) }</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="4202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4202

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<pre style="margin: 0;">+<span id="LC4202" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- see Note [GADT return types]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4101

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<td class="diff-line-num new_line" data-linenumber="4203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4203

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<pre style="margin: 0;"> <span id="LC4203" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">checkTc</span> <span class="p">(</span><span class="n" style="color: #333;">isJust</span> <span class="p">(</span><span class="n" style="color: #333;">tcMatchTyKi</span> <span class="n" style="color: #333;">res_ty_tmpl</span> <span class="n" style="color: #333;">orig_res_ty</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4102

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<td class="diff-line-num new_line" data-linenumber="4204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4204

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<pre style="margin: 0;"> <span id="LC4204" class="line" lang="haskell">                  <span class="p">(</span><span class="n" style="color: #333;">badDataConTyCon</span> <span class="n" style="color: #333;">con</span> <span class="n" style="color: #333;">res_ty_tmpl</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4103

</td>

<td class="diff-line-num new_line" data-linenumber="4205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4205

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<pre style="margin: 0;"> <span id="LC4205" class="line" lang="haskell">            <span class="c1" style="color: #998; font-style: italic;">-- Note that checkTc aborts if it finds an error. This is</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="4307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4205,7 +4307,9 @@ checkValidDataCon dflags existential_ok tc con</td>

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<td class="diff-line-num old_line" data-linenumber="4205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4205

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<td class="diff-line-num new_line" data-linenumber="4307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4307

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<pre style="margin: 0;"> <span id="LC4307" class="line" lang="haskell">                   <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">f</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConBinders</span> <span class="n" style="color: #333;">f</span><span class="p">)</span> <span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4206

</td>

<td class="diff-line-num new_line" data-linenumber="4308" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4308

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<pre style="margin: 0;"> <span id="LC4308" class="line" lang="haskell">    <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4207

</td>

<td class="diff-line-num new_line" data-linenumber="4309" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4309

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<pre style="margin: 0;"> <span id="LC4309" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4208

</td>

<td class="diff-line-num new_line old" data-linenumber="4310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4208" class="line" lang="haskell">    <span class="n" style="color: #333;">ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ConArgCtxt</span> <span class="p">(</span><span class="n" style="color: #333;">dataConName</span> <span class="n" style="color: #333;">con</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="4209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="4310" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4310

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<pre style="margin: 0;">+<span id="LC4310" class="line" lang="haskell">    <span class="n" style="color: #333;">con_name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConName</span> <span class="n" style="color: #333;">con</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC4311" class="line" lang="haskell">    <span class="n" style="color: #333;">con_loc</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nameSrcSpan</span> <span class="n" style="color: #333;">con_name</span></span>

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<pre style="margin: 0;">+<span id="LC4312" class="line" lang="haskell">    <span class="n" style="color: #333;">ctxt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ConArgCtxt</span> <span class="n" style="color: #333;">con_name</span></span>

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<pre style="margin: 0;"> <span id="LC4313" class="line" lang="haskell">    <span class="n" style="color: #333;">is_strict</span> <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">case</span></span>

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<pre style="margin: 0;"> <span id="LC4314" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">NoSrcStrict</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">xopt</span> <span class="kt" style="color: #458; font-weight: 600;">LangExt</span><span class="o" style="font-weight: 600;">.</span><span class="kt" style="color: #458; font-weight: 600;">StrictData</span> <span class="n" style="color: #333;">dflags</span></span>

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<pre style="margin: 0;"> <span id="LC4315" class="line" lang="haskell">      <span class="n" style="color: #333;">bang</span>        <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">isSrcStrict</span> <span class="n" style="color: #333;">bang</span></span>

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<pre style="margin: 0;"> <span id="LC4973" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="p">[</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Constructors"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con1</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"and"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con2</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC4974" class="line" lang="haskell">         <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"give different types for field"</span><span class="p">,</span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">field_name</span><span class="p">)]</span></span>

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<pre style="margin: 0;"> <span id="LC4975" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC4872" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxtName</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;">-<span id="LC4873" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxtName</span> <span class="p">[</span><span class="n" style="color: #333;">con</span><span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC4874" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the definition of data constructor"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC4875" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxtName</span> <span class="n" style="color: #333;">con</span></span>

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<pre style="margin: 0;">-<span id="LC4876" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the definition of data constructors"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">interpp'SP</span> <span class="n" style="color: #333;">con</span></span>

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<pre style="margin: 0;">+<span id="LC4976" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxt</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;">+<span id="LC4977" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxt</span> <span class="n" style="color: #333;">cons</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the definition of data constructor"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">plural</span> <span class="n" style="color: #333;">cons</span></span>

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<pre style="margin: 0;">+<span id="LC4978" class="line" lang="haskell">                   <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr_cons</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4979" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC4979" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4980" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC4980" class="line" lang="haskell"><span class="n" style="color: #333;">dataConResCtxt</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4981" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4981

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<pre style="margin: 0;">+<span id="LC4981" class="line" lang="haskell"><span class="n" style="color: #333;">dataConResCtxt</span> <span class="n" style="color: #333;">cons</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the result type of data constructor"</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">plural</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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4982

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<pre style="margin: 0;">+<span id="LC4982" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr_cons</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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4877

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4983

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<pre style="margin: 0;"> <span id="LC4983" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="4878" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4878

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<td class="diff-line-num new_line old" data-linenumber="4984" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC4878" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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4879

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<pre style="margin: 0;">-<span id="LC4879" class="line" lang="haskell"><span class="n" style="color: #333;">dataConCtxt</span> <span class="n" style="color: #333;">con</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the definition of data constructor"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con</span><span class="p">)</span></span>

</pre>

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4984

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<pre style="margin: 0;">+<span id="LC4984" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_cons</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC4985" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_cons</span> <span class="p">[</span><span class="n" style="color: #333;">con</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">con</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4986" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC4986" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_cons</span> <span class="n" style="color: #333;">cons</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">interpp'SP</span> <span class="n" style="color: #333;">cons</span></span>

</pre>

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4987

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<pre style="margin: 0;"> <span id="LC4987" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC4988" class="line" lang="haskell"><span class="n" style="color: #333;">classOpCtxt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="4989" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4989

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<pre style="margin: 0;"> <span id="LC4989" class="line" lang="haskell"><span class="n" style="color: #333;">classOpCtxt</span> <span class="n" style="color: #333;">sel_id</span> <span class="n" style="color: #333;">tau</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="p">[</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"When checking the class method:"</span><span class="p">,</span></span>

</pre>

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<br>

</li>

<li id="e63425e031ffe9350ee6b1687e506aaea75d11e1">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#e63425e031ffe9350ee6b1687e506aaea75d11e1"><strong>compiler/GHC/Tc/TyCl/Instance.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="688" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -688,9 +688,8 @@ tcDataFamInstDecl mb_clsinfo tv_skol_env</td>

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<pre style="margin: 0;"> <span id="LC688" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- Do /not/ check that the number of patterns = tyConArity fam_tc</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC689" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- See [Arity of data families] in GHC.Core.FamInstEnv</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC690" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">qtvs</span><span class="p">,</span> <span class="n" style="color: #333;">pats</span><span class="p">,</span> <span class="n" style="color: #333;">res_kind</span><span class="p">,</span> <span class="n" style="color: #333;">stupid_theta</span><span class="p">)</span></span>

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691

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<td class="diff-line-num new_line old" data-linenumber="691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC691" class="line" lang="haskell">             <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcDataFamInstHeader</span> <span class="n" style="color: #333;">mb_clsinfo</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">outer_bndrs</span></span>

</pre>

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692

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<pre style="margin: 0;">-<span id="LC692" class="line" lang="haskell">                                    <span class="n" style="color: #333;">fixity</span> <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">m_ksig</span> <span class="n" style="color: #333;">hs_cons</span></span>

</pre>

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693

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<pre style="margin: 0;">-<span id="LC693" class="line" lang="haskell">                                    <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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691

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<pre style="margin: 0;">+<span id="LC691" class="line" lang="haskell">             <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcDataFamInstHeader</span> <span class="n" style="color: #333;">mb_clsinfo</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">outer_bndrs</span> <span class="n" style="color: #333;">fixity</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC692" class="line" lang="haskell">                                    <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">m_ksig</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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694

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<pre style="margin: 0;"> <span id="LC693" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

695

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694

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<pre style="margin: 0;"> <span id="LC694" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Eta-reduce the axiom if possible</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="696" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

696

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<td class="diff-line-num new_line" data-linenumber="695" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC695" class="line" lang="haskell">       <span class="c1" style="color: #998; font-style: italic;">-- Quite tricky: see Note [Implementing eta reduction for data families]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -740,8 +739,9 @@ tcDataFamInstDecl mb_clsinfo tv_skol_env</td>

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740

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<pre style="margin: 0;"> <span id="LC739" class="line" lang="haskell">           <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">data_cons</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcExtendTyVarEnv</span> <span class="n" style="color: #333;">qtvs</span> <span class="o" style="font-weight: 600;">$</span></span>

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<td class="diff-line-num old_line" data-linenumber="741" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

741

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740

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<pre style="margin: 0;"> <span id="LC740" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- For H98 decls, the tyvars scope</span></span>

</pre>

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742

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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- over the data constructors</span></span>

</pre>

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743

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<td class="diff-line-num new_line old" data-linenumber="742" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC743" class="line" lang="haskell">                  <span class="n" style="color: #333;">tcConDecls</span> <span class="n" style="color: #333;">rec_rep_tc</span> <span class="n" style="color: #333;">new_or_data</span> <span class="n" style="color: #333;">ty_binders</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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744

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<pre style="margin: 0;">-<span id="LC744" class="line" lang="haskell">                             <span class="n" style="color: #333;">orig_res_ty</span> <span class="n" style="color: #333;">hs_cons</span></span>

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<pre style="margin: 0;">+<span id="LC742" class="line" lang="haskell">                  <span class="n" style="color: #333;">tcConDecls</span> <span class="n" style="color: #333;">new_or_data</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DDataInstance</span> <span class="n" style="color: #333;">orig_res_ty</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC743" class="line" lang="haskell">                             <span class="n" style="color: #333;">rec_rep_tc</span> <span class="n" style="color: #333;">ty_binders</span> <span class="n" style="color: #333;">final_res_kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="744" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

744

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<pre style="margin: 0;">+<span id="LC744" class="line" lang="haskell">                             <span class="n" style="color: #333;">hs_cons</span></span>

</pre>

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745

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<pre style="margin: 0;"> <span id="LC745" class="line" lang="haskell"></span>

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746

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<td class="diff-line-num new_line" data-linenumber="746" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

746

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<pre style="margin: 0;"> <span id="LC746" class="line" lang="haskell">              <span class="p">;</span> <span class="n" style="color: #333;">rep_tc_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newFamInstTyConName</span> <span class="n" style="color: #333;">lfam_name</span> <span class="n" style="color: #333;">pats</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="747" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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747

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<pre style="margin: 0;"> <span id="LC747" class="line" lang="haskell">              <span class="p">;</span> <span class="n" style="color: #333;">axiom_name</span>  <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newFamInstAxiomName</span> <span class="n" style="color: #333;">lfam_name</span> <span class="p">[</span><span class="n" style="color: #333;">pats</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -857,7 +857,7 @@ TyVarEnv will simply be empty, and there is nothing to worry about.</td>

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<td class="diff-line-num old_line" data-linenumber="857" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

857

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857

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<pre style="margin: 0;"> <span id="LC857" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstHeader</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

858

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<td class="diff-line-num new_line" data-linenumber="858" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

858

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<pre style="margin: 0;"> <span id="LC858" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">AssocInstInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsOuterFamEqnTyVarBndrs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="859" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

859

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<td class="diff-line-num new_line" data-linenumber="859" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

859

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<pre style="margin: 0;"> <span id="LC859" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LexicalFixity</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsContext</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

860

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<td class="diff-line-num new_line old" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC860" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsTyPats</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsKind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">)</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">LConDecl</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">GhcRn</span></span><span class="p"><span class="idiff right">]</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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860

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<pre style="margin: 0;">+<span id="LC860" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsTyPats</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsKind</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

861

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<td class="diff-line-num new_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

861

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<pre style="margin: 0;"> <span id="LC861" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NewOrData</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

862

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<td class="diff-line-num new_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

862

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<pre style="margin: 0;"> <span id="LC862" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">],</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">Kind</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ThetaType</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="863" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

863

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<td class="diff-line-num new_line" data-linenumber="863" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

863

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<pre style="margin: 0;"> <span id="LC863" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The "header" of a data family instance is the part other than</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -865,7 +865,7 @@ tcDataFamInstHeader</td>

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<td class="diff-line-num old_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

865

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<td class="diff-line-num new_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

865

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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--    e.g.  data instance D [a] :: * -> * where ...</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

866

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<td class="diff-line-num new_line" data-linenumber="866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

866

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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Here the "header" is the bit before the "where"</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="867" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

867

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<td class="diff-line-num new_line" data-linenumber="867" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

867

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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell"><span class="n" style="color: #333;">tcDataFamInstHeader</span> <span class="n" style="color: #333;">mb_clsinfo</span> <span class="n" style="color: #333;">fam_tc</span> <span class="n" style="color: #333;">outer_bndrs</span> <span class="n" style="color: #333;">fixity</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

868

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<td class="diff-line-num new_line old" data-linenumber="868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC868" class="line" lang="haskell">                    <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">m_ksig</span> <span class="n" style="color: #333;"><span class="idiff left">hs_cons</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="869" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="868" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

868

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<pre style="margin: 0;">+<span id="LC868" class="line" lang="haskell">                    <span class="n" style="color: #333;">hs_ctxt</span> <span class="n" style="color: #333;">hs_pats</span> <span class="n" style="color: #333;">m_ksig</span> <span class="n" style="color: #333;">new_or_data</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC869" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcDataFamInstHeader {"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fam_tc</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">hs_pats</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC870" class="line" lang="haskell">       <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">tclvl</span><span class="p">,</span> <span class="n" style="color: #333;">wanted</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">scoped_tvs</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">stupid_theta</span><span class="p">,</span> <span class="n" style="color: #333;">lhs_ty</span><span class="p">,</span> <span class="n" style="color: #333;">master_res_kind</span><span class="p">,</span> <span class="n" style="color: #333;">instance_res_kind</span><span class="p">)))</span></span>

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<pre style="margin: 0;"> <span id="LC871" class="line" lang="haskell">            <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pushLevelAndSolveEqualitiesX</span> <span class="s" style="color: #d14;">"tcDataFamInstHeader"</span> <span class="o" style="font-weight: 600;">$</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="884" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="884" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -884,8 +884,8 @@ tcDataFamInstHeader mb_clsinfo fam_tc outer_bndrs fixity</td>

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<pre style="margin: 0;"> <span id="LC884" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- Add constraints from the result signature</span></span>

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<pre style="margin: 0;"> <span id="LC885" class="line" lang="haskell">                  <span class="p">;</span> <span class="n" style="color: #333;">res_kind</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc_kind_sig</span> <span class="n" style="color: #333;">m_ksig</span></span>

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<pre style="margin: 0;"> <span id="LC886" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC887" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">A</span>dd constraints from the data constructors</span></span>

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<pre style="margin: 0;">-<span id="LC888" class="line" lang="haskell">                  <span class="p"><span class="idiff left">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">kcConDecls</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">new_or_data</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">res_kind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">hs_cons</span></span></span>

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<pre style="margin: 0;">+<span id="LC887" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">Do not a</span>dd constraints from the data constructors</span></span>

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<pre style="margin: 0;">+<span id="LC888" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- See Note [Kind inference for data family instances]</span></span></span>

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<pre style="margin: 0;"> <span id="LC889" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC890" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- Check that the result kind of the TyCon applied to its args</span></span>

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<pre style="margin: 0;"> <span id="LC891" class="line" lang="haskell">                  <span class="c1" style="color: #998; font-style: italic;">-- is compatible with the explicit signature (or Type, if there</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1049" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1049" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1049,6 +1049,86 @@ however, so this Note aims to describe these subtleties:</td>

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<pre style="margin: 0;"> <span id="LC1049" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  themselves.  Heavy sigh.  But not truly hard; that's what tcbVisibilities</span></span>

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<pre style="margin: 0;"> <span id="LC1050" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  does.</span></span>

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<pre style="margin: 0;"> <span id="LC1051" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC1052" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Kind inference for data family instances]</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1053" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1053

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<pre style="margin: 0;">+<span id="LC1053" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1054" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1054

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<pre style="margin: 0;">+<span id="LC1054" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider this GADT-style data type declaration, where I have used</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1055" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1055

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<pre style="margin: 0;">+<span id="LC1055" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">fresh variables in the data constructor's type, to stress that c,d are</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1056" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1056

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<pre style="margin: 0;">+<span id="LC1056" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">quite distinct from a,b.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1057" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1057

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<pre style="margin: 0;">+<span id="LC1057" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data T a b where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1058" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1058

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<pre style="margin: 0;">+<span id="LC1058" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     MkT :: forall c d. c d -> T c d</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1059" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1059

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<pre style="margin: 0;">+<span id="LC1059" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1060" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1060

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<pre style="margin: 0;">+<span id="LC1060" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Following Note [Inferring kinds for type declarations] in GHC.Tc.TyCl,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1061" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1061

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<pre style="margin: 0;">+<span id="LC1061" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to infer T's kind, we initially give T :: kappa, a monomorpic kind,</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1062" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1062

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<pre style="margin: 0;">+<span id="LC1062" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">gather constraints from the header and data constructors, and conclude</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1063" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1063

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<pre style="margin: 0;">+<span id="LC1063" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   T :: (kappa1 -> type) -> kappa1 -> Type</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1064" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1064

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<pre style="margin: 0;">+<span id="LC1064" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Then we generalise, giving</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1065" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1065

</td>

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<pre style="margin: 0;">+<span id="LC1065" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   T :: forall k. (k->Type) -> k -> Type</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1066" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1066

</td>

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<pre style="margin: 0;">+<span id="LC1066" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1067" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1067

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<pre style="margin: 0;">+<span id="LC1067" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Now what about a data /instance/ decl</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1068" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1068

</td>

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<pre style="margin: 0;">+<span id="LC1068" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data family T :: forall k. (k->Type) -> k -> Type</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1069" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1069

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1069" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1070" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1070

</td>

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<pre style="margin: 0;">+<span id="LC1070" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T p Int where ...</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1071" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1071

</td>

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<pre style="margin: 0;">+<span id="LC1071" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1072" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1072

</td>

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<pre style="margin: 0;">+<span id="LC1072" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">No doubt here! The poly-kinded T is instantiated with k=Type, so the</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1073" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1073

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1073" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">header really looks like</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1074" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1074

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<pre style="margin: 0;">+<span id="LC1074" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T @Type (p :: Type->Type) Int where ...</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1075" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1075

</td>

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<pre style="margin: 0;">+<span id="LC1075" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1076" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1076

</td>

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<pre style="margin: 0;">+<span id="LC1076" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But what about this?</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1077" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1077

</td>

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<pre style="margin: 0;">+<span id="LC1077" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T p q where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1078" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1078

</td>

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<pre style="margin: 0;">+<span id="LC1078" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      MkT :: forall r. r Int -> T r Int</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1079" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1079

</td>

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<pre style="margin: 0;">+<span id="LC1079" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1080" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1080

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<pre style="margin: 0;">+<span id="LC1080" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So what kind do 'p' and 'q' have?  No clues from the header, but from</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1081" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1081

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1081" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the data constructor we can clearly see that (r :: Type->Type).  Does</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1082" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1082

</td>

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<pre style="margin: 0;">+<span id="LC1082" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that mean that the the /entire data instance/ is instantiated at Type,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1083" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1083

</td>

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<pre style="margin: 0;">+<span id="LC1083" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">like this?</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1084" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1084

</td>

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<pre style="margin: 0;">+<span id="LC1084" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T @Type (p :: Type->Type) (q :: Type) where</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1085" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1085

</td>

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<pre style="margin: 0;">+<span id="LC1085" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      ...</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1086" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1086

</td>

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<pre style="margin: 0;">+<span id="LC1086" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1087" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1087

</td>

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<pre style="margin: 0;">+<span id="LC1087" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Not at all! This is a /GADT/-style decl, so the kind argument might</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1088" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1088

</td>

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<pre style="margin: 0;">+<span id="LC1088" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">be specialised in this particular data constructor, thus:</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1089" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1089

</td>

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<pre style="margin: 0;">+<span id="LC1089" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   data instance T @k (p :: k->Type) (q :: k) where</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1090" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1090

</td>

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<pre style="margin: 0;">+<span id="LC1090" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     MkT :: forall (r :: Type -> Type).</span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1091" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1091

</td>

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<pre style="margin: 0;">+<span id="LC1091" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            r Int -> T @Type r Int</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1092" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1092

</td>

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<pre style="margin: 0;">+<span id="LC1092" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(and perhaps specialised differently in some other data</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1093" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1093

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<pre style="margin: 0;">+<span id="LC1093" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">constructor MkT2).</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1094" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1094

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<pre style="margin: 0;">+<span id="LC1094" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1095" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1095

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<pre style="margin: 0;">+<span id="LC1095" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The key difference in this case and 'data T' at the top of this Note</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1096" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1096

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1096" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is that we have no known kind for 'data T'. We thus forbid different</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1097" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1097

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<pre style="margin: 0;">+<span id="LC1097" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">specialisations of T in its constructors, in an attempt to avoid</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1098" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1098

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<pre style="margin: 0;">+<span id="LC1098" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">inferring polymorphic recursion. In data family T, however, there is</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1099" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1099

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<pre style="margin: 0;">+<span id="LC1099" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">no problem with polymorphic recursion: we already /fully know/ T's</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1100" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1100

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<pre style="margin: 0;">+<span id="LC1100" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">kind -- that came from the family declaration, and is not influenced</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1101

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<pre style="margin: 0;">+<span id="LC1101" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">by the data instances -- and hence we /can/ specialise T's kind</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1102

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<pre style="margin: 0;">+<span id="LC1102" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">differently in different GADT data constructors.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1103

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<pre style="margin: 0;">+<span id="LC1103" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1104

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<pre style="margin: 0;">+<span id="LC1104" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">SHORT SUMMARY: in a data instance decl, it's not clear whether kind</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1105

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<pre style="margin: 0;">+<span id="LC1105" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">constraints arising from the data constructors should be considered</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1106

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<pre style="margin: 0;">+<span id="LC1106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">local to the (GADT) data /constructor/ or should apply to the entire</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1107

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<pre style="margin: 0;">+<span id="LC1107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data instance.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1108

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<pre style="margin: 0;">+<span id="LC1108" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1109

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<pre style="margin: 0;">+<span id="LC1109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">DESIGN CHOICE: in data/newtype family instance declarations, we ignore</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1110

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<pre style="margin: 0;">+<span id="LC1110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the /data constructor/ declarations altogether, looking only at the</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1111

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<pre style="margin: 0;">+<span id="LC1111" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">data instance /header/.</span></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="1112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1112

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<pre style="margin: 0;">+<span id="LC1112" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1113

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<pre style="margin: 0;">+<span id="LC1113" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Observations:</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1114

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<pre style="margin: 0;">+<span id="LC1114" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* This choice is simple to describe, as well as simple to implment.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1115

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<pre style="margin: 0;">+<span id="LC1115" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  For a data/newtype instance decl, the instance kinds are influenced</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1116

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<pre style="margin: 0;">+<span id="LC1116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  /only/ by the header.</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1117

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<pre style="margin: 0;">+<span id="LC1117" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1118

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<pre style="margin: 0;">+<span id="LC1118" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* We could treat Haskell-98 style data-instance decls differently, by</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1119

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<pre style="margin: 0;">+<span id="LC1119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  taking the data constructors into account, since there are no GADT</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1120

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<pre style="margin: 0;">+<span id="LC1120" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  issues.  But we don't, for simplicity, and because it means you can</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1121" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1121

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<pre style="margin: 0;">+<span id="LC1121" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  understand the data type instance by looking only at the header.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1122

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<pre style="margin: 0;">+<span id="LC1122" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1123" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1123

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<pre style="margin: 0;">+<span id="LC1123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Newtypes can be declared in GADT syntax, but they can't do GADT-style</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1124" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1124

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<pre style="margin: 0;">+<span id="LC1124" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  specialisation, so like Haskell-98 definitions we could take the</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1125

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<pre style="margin: 0;">+<span id="LC1125" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  data constructors into account.  Again we don't, for the same reason.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1126

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<pre style="margin: 0;">+<span id="LC1126" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1127

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<pre style="margin: 0;">+<span id="LC1127" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So for now at least, we keep the simplest choice. See #18891 and !4419</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1128" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1128

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<pre style="margin: 0;">+<span id="LC1128" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">for more discussion of this issue.</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1129

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<pre style="margin: 0;">+<span id="LC1129" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1130

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<pre style="margin: 0;">+<span id="LC1130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Kind inference for data types (Xie et al) https://arxiv.org/abs/1911.06153</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1052" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1131

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<pre style="margin: 0;">+<span id="LC1131" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">takes a slightly different approach.</span></span>

</pre>

</td>

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1052

</td>

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1132

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<pre style="margin: 0;"> <span id="LC1132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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1053

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<pre style="margin: 0;"> <span id="LC1133" class="line" lang="haskell"></span>

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1134

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<pre style="margin: 0;"> <span id="LC1134" class="line" lang="haskell"></span>

</pre>

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<li id="d87dfc77856eeaef6134e28336290ddcbcf18d7d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#d87dfc77856eeaef6134e28336290ddcbcf18d7d"><strong>docs/users_guide/9.2.1-notes.rst</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -14,6 +14,11 @@ Language</td>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="plaintext">  (Serrano et al, ICFP 2020).  More information here: :ref:`impredicative-polymorphism`.</span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="plaintext">  This replaces the old (undefined, flaky) behaviour of the :extension:`ImpredicativeTypes` extension.</span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext">* Kind inference for data/newtype instance declarations is slightly</span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext">  more restrictive than before.  See the user manual :ref:`kind-inference-data-family-instances`.</span>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="plaintext">  This is a breaking change, albeit a fairly obscure one that corrects a specification bug.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="plaintext"></span>

</pre>

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17

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="plaintext">Compiler</span>

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18

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="plaintext">~~~~~~~~</span>

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19

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext"></span>

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<li id="fa050e1532c92b2ffc94692d8b368f3fefa3196d">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#fa050e1532c92b2ffc94692d8b368f3fefa3196d"><strong>docs/users_guide/exts/poly_kinds.rst</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -130,8 +130,45 @@ This rule has occasionally-surprising consequences (see</td>

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<pre style="margin: 0;"> <span id="LC130" class="line" lang="plaintext">The kind-polymorphism from the class declaration makes ``D1``</span>

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<pre style="margin: 0;"> <span id="LC131" class="line" lang="plaintext">kind-polymorphic, but not so ``D2``; and similarly ``F1``, ``F2``.</span>

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<pre style="margin: 0;"> <span id="LC132" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC133" class="line" lang="plaintext">Kind inference in type signatures</span>

</pre>

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<pre style="margin: 0;">+<span id="LC134" class="line" lang="plaintext">---------------------------------</span>

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<pre style="margin: 0;">+<span id="LC135" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC136" class="line" lang="plaintext">When kind-checking a type, GHC considers only what is written in that</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

137

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<pre style="margin: 0;">+<span id="LC137" class="line" lang="plaintext">type when figuring out how to generalise the type's kind.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC138" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

139

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<pre style="margin: 0;">+<span id="LC139" class="line" lang="plaintext">For example,</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

140

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<pre style="margin: 0;">+<span id="LC140" class="line" lang="plaintext">consider these definitions (with :extension:`ScopedTypeVariables`): ::</span>

</pre>

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141

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC142" class="line" lang="plaintext">  data Proxy a    -- Proxy :: forall k. k -> Type</span>

</pre>

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<pre style="margin: 0;">+<span id="LC143" class="line" lang="plaintext">  p :: forall a. Proxy a</span>

</pre>

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144

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<pre style="margin: 0;">+<span id="LC144" class="line" lang="plaintext">  p = Proxy :: Proxy (a :: Type)</span>

</pre>

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145

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<pre style="margin: 0;">+<span id="LC145" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC146" class="line" lang="plaintext">GHC reports an error, saying that the kind of ``a`` should be a kind variable</span>

</pre>

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<pre style="margin: 0;">+<span id="LC147" class="line" lang="plaintext">``k``, not ``Type``. This is because, by looking at the type signature</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC148" class="line" lang="plaintext">``forall a. Proxy a``, GHC assumes ``a``'s kind should be generalised, not</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="149" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

149

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<pre style="margin: 0;">+<span id="LC149" class="line" lang="plaintext">restricted to be ``Type``. The function definition is then rejected for being</span>

</pre>

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<pre style="margin: 0;">+<span id="LC150" class="line" lang="plaintext">more specific than its type signature.</span>

</pre>

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151

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<pre style="margin: 0;">+<span id="LC151" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="152" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="plaintext">.. _explicit-kind-quantification:</span>

</pre>

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153

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<pre style="margin: 0;">+<span id="LC153" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC154" class="line" lang="plaintext">Explicit kind quantification</span>

</pre>

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<pre style="margin: 0;">+<span id="LC155" class="line" lang="plaintext">----------------------------</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC156" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC157" class="line" lang="plaintext">Enabled by :extension:`PolyKinds`, GHC supports explicit kind quantification,</span>

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<pre style="margin: 0;">+<span id="LC158" class="line" lang="plaintext">as in these examples: ::</span>

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<pre style="margin: 0;">+<span id="LC159" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="plaintext">  data Proxy :: forall k. k -> Type</span>

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="plaintext">  f :: (forall k (a :: k). Proxy a -> ()) -> Int</span>

</pre>

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<pre style="margin: 0;">+<span id="LC162" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="plaintext">Note that the second example has a ``forall`` that binds both a kind ``k`` and</span>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="plaintext">a type variable ``a`` of kind ``k``. In general, there is no limit to how</span>

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="plaintext">deeply nested this sort of dependency can work. However, the dependency must</span>

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="plaintext">be well-scoped: ``forall (a :: k) k. ...`` is an error.</span>

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="plaintext">.. _inferring-variable-order:</span>

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<pre style="margin: 0;"> <span id="LC170" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC172" class="line" lang="plaintext">Inferring the order of variables in a type/class declaration</span>

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<pre style="margin: 0;"> <span id="LC173" class="line" lang="plaintext">------------------------------------------------------------</span>

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="plaintext"></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="527" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -490,41 +527,92 @@ This also applies to GADT-style data instances: ::</td>

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<pre style="margin: 0;"> <span id="LC527" class="line" lang="plaintext">      --   • In the data instance declaration for ‘T’</span>

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<pre style="margin: 0;"> <span id="LC528" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC529" class="line" lang="plaintext"></span>

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<td class="diff-line-num old old_line" data-linenumber="493" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

493

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<td class="diff-line-num new_line old" data-linenumber="530" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC493" class="line" lang="plaintext">Kind inference in <span class="idiff left right">closed type familie</span>s</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="494" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

494

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<td class="diff-line-num new_line old" data-linenumber="530" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC494" class="line" lang="plaintext">--------------------------------------</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="495" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="530" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

530

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC530" class="line" lang="plaintext">Kind inference in <span class="idiff left right">data type declaration</span>s</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="495" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="531" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

531

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC531" class="line" lang="plaintext">--------------------------------------<span class="idiff left right">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="495" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

495

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<td class="diff-line-num new_line" data-linenumber="532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

532

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC532" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="496" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

496

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<td class="diff-line-num new_line old" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC496" class="line" lang="plaintext">Although all open type families are considered to have a complete</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="497" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

497

</td>

<td class="diff-line-num new_line old" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC497" class="line" lang="plaintext">user-supplied kind signature, we can relax this condition for closed</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="498" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

498

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<td class="diff-line-num new_line old" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC498" class="line" lang="plaintext">type families, where we have equations on which to perform kind</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="499" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

499

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<td class="diff-line-num new_line old" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC499" class="line" lang="plaintext">inference. GHC will infer kinds for the arguments and result types of a</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="500" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

500

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<td class="diff-line-num new_line old" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC500" class="line" lang="plaintext">closed type family.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

533

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC533" class="line" lang="plaintext">Consider the declaration ::</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="501" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

501

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534

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC534" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="502" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

502

</td>

<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC502" class="line" lang="plaintext">GHC supports *kind-indexed* type families, where the family matches both</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="503" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

503

</td>

<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC503" class="line" lang="plaintext">on the kind and type. GHC will *not* infer this behaviour without a</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="504" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

504

</td>

<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC504" class="line" lang="plaintext">complete user-supplied kind signature, as doing so would sometimes infer</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="505" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

505

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<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC505" class="line" lang="plaintext">non-principal types. Indeed, we can see kind-indexing as a form</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="506" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

506

</td>

<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC506" class="line" lang="plaintext">of polymorphic recursion, where a type is used at a kind other than</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="507" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

507

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<td class="diff-line-num new_line old" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC507" class="line" lang="plaintext">its most general in its own definition.</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

535

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC535" class="line" lang="plaintext">  data T1 f a = MkT1 (f a)</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

536

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC536" class="line" lang="plaintext">  data T2 f a where</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="508" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

537

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC537" class="line" lang="plaintext">    MkT2 :: f a -> T f a</span>

</pre>

</td>

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508

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<td class="diff-line-num new_line" data-linenumber="538" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

538

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC538" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="509" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

509

</td>

<td class="diff-line-num new_line old" data-linenumber="539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC509" class="line" lang="plaintext">For example: ::</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="510" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

539

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC539" class="line" lang="plaintext">In both cases GHC looks at the data constructor declarations to</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="510" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="540" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

540

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC540" class="line" lang="plaintext">give constraints on the kind of ``T``, yielding ::</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="510" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

510

</td>

<td class="diff-line-num new_line" data-linenumber="541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

541

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC541" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="511" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

511

</td>

<td class="diff-line-num new_line old" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC511" class="line" lang="plaintext">    type family F1 a where</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="512" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

512

</td>

<td class="diff-line-num new_line old" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC512" class="line" lang="plaintext">      F1 True  = False</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="513" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

513

</td>

<td class="diff-line-num new_line old" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC513" class="line" lang="plaintext">      F1 False = True</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="514" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

514

</td>

<td class="diff-line-num new_line old" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC514" class="line" lang="plaintext">      F1 x     = x</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="515" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

515

</td>

<td class="diff-line-num new_line old" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC515" class="line" lang="plaintext">    -- F1 fails to compile: kind-indexing is not inferred</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="516" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="542" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

542

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC542" class="line" lang="plaintext">  T1, T2 :: forall k. (k -> Type) -> k -> Type</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="516" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

516

</td>

<td class="diff-line-num new_line" data-linenumber="543" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

543

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC543" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="517" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

517

</td>

<td class="diff-line-num new_line old" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC517" class="line" lang="plaintext">    type family F2 (a :: k) where</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="518" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

518

</td>

<td class="diff-line-num new_line old" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC518" class="line" lang="plaintext">      F2 True  = False</span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="519" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

519

</td>

<td class="diff-line-num new_line old" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC519" class="line" lang="plaintext">      F2 False = True</span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="520" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

520

</td>

<td class="diff-line-num new_line old" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC520" class="line" lang="plaintext">      F2 x     = x</span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="521" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

521

</td>

<td class="diff-line-num new_line old" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC521" class="line" lang="plaintext">    -- F2 fails to compile: no complete signature</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="544" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

544

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC544" class="line" lang="plaintext">Consider the type ::</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="545" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

545

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC545" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="546" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

546

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC546" class="line" lang="plaintext">  type G :: forall k. k -> Type</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="547" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

547

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC547" class="line" lang="plaintext">  data G (a :: k) where</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="522" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="548" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

548

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC548" class="line" lang="plaintext">    GInt    :: G Int</span>

</pre>

</td>

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<pre style="margin: 0;">+<span id="LC549" class="line" lang="plaintext">    GMaybe  :: G Maybe</span>

</pre>

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<pre style="margin: 0;">+<span id="LC550" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC551" class="line" lang="plaintext">This datatype ``G`` is GADT-like in both its kind and its type. Suppose you</span>

</pre>

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<pre style="margin: 0;">+<span id="LC552" class="line" lang="plaintext">have ``g :: G a``, where ``a :: k``. Then pattern matching to discover that</span>

</pre>

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<pre style="margin: 0;">+<span id="LC553" class="line" lang="plaintext">``g`` is in fact ``GMaybe`` tells you both that ``k ~ (Type -> Type)`` and</span>

</pre>

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<pre style="margin: 0;">+<span id="LC554" class="line" lang="plaintext">``a ~ Maybe``. The definition for ``G`` requires that :extension:`PolyKinds`</span>

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<pre style="margin: 0;">+<span id="LC555" class="line" lang="plaintext">be in effect, but pattern-matching on ``G`` requires no extension beyond</span>

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<pre style="margin: 0;">+<span id="LC556" class="line" lang="plaintext">:extension:`GADTs`. That this works is actually a straightforward extension</span>

</pre>

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<pre style="margin: 0;">+<span id="LC557" class="line" lang="plaintext">of regular GADTs and a consequence of the fact that kinds and types are the</span>

</pre>

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<pre style="margin: 0;">+<span id="LC558" class="line" lang="plaintext">same.</span>

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<pre style="margin: 0;">+<span id="LC559" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC560" class="line" lang="plaintext">Note that the datatype ``G`` is used at different kinds in its body, and</span>

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<pre style="margin: 0;">+<span id="LC561" class="line" lang="plaintext">therefore that kind-indexed GADTs use a form of polymorphic recursion.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC562" class="line" lang="plaintext">It is thus only possible to use this feature if you have provided a</span>

</pre>

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<pre style="margin: 0;">+<span id="LC563" class="line" lang="plaintext">complete user-supplied kind signature (CUSK)</span>

</pre>

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<pre style="margin: 0;">+<span id="LC564" class="line" lang="plaintext">for the datatype (:ref:`complete-kind-signatures`), or a standalone</span>

</pre>

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<pre style="margin: 0;">+<span id="LC565" class="line" lang="plaintext">kind signature (:ref:`standalone-kind-signatures`);</span>

</pre>

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<pre style="margin: 0;">+<span id="LC566" class="line" lang="plaintext">in the case of ``G`` we both.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC567" class="line" lang="plaintext">If you wish to see the kind indexing explicitly, you can do so by enabling :ghc-flag:`-fprint-explicit-kinds` and querying ``G`` with GHCi's :ghci-cmd:`:info` command: ::</span>

</pre>

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<pre style="margin: 0;">+<span id="LC568" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC569" class="line" lang="plaintext">  > :set -fprint-explicit-kinds</span>

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</td>

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570

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<pre style="margin: 0;">+<span id="LC570" class="line" lang="plaintext">  > :info G</span>

</pre>

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571

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<pre style="margin: 0;">+<span id="LC571" class="line" lang="plaintext">  type role G nominal nominal</span>

</pre>

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</td>

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572

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<pre style="margin: 0;">+<span id="LC572" class="line" lang="plaintext">  type G :: forall k. k -> Type</span>

</pre>

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573

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<pre style="margin: 0;">+<span id="LC573" class="line" lang="plaintext">  data G @k a where</span>

</pre>

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</td>

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574

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<pre style="margin: 0;">+<span id="LC574" class="line" lang="plaintext">    GInt   :: G @Type Int</span>

</pre>

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</td>

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575

</td>

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<pre style="margin: 0;">+<span id="LC575" class="line" lang="plaintext">    GMaybe :: G @(Type -> Type) Maybe</span>

</pre>

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576

</td>

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<pre style="margin: 0;">+<span id="LC576" class="line" lang="plaintext"></span>

</pre>

</td>

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</td>

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577

</td>

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<pre style="margin: 0;">+<span id="LC577" class="line" lang="plaintext">where you can see the GADT-like nature of the two constructors.</span>

</pre>

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</td>

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578

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<pre style="margin: 0;">+<span id="LC578" class="line" lang="plaintext"></span>

</pre>

</td>

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579

</td>

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<pre style="margin: 0;">+<span id="LC579" class="line" lang="plaintext">.. _kind-inference-data-family-instances:</span>

</pre>

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580

</td>

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<pre style="margin: 0;">+<span id="LC580" class="line" lang="plaintext"></span>

</pre>

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581

</td>

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<pre style="margin: 0;">+<span id="LC581" class="line" lang="plaintext">Kind inference for data/newtype instance declarations</span>

</pre>

</td>

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582

</td>

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<pre style="margin: 0;">+<span id="LC582" class="line" lang="plaintext">-----------------------------------------------------</span>

</pre>

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</td>

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583

</td>

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<pre style="margin: 0;">+<span id="LC583" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="584" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

584

</td>

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<pre style="margin: 0;">+<span id="LC584" class="line" lang="plaintext">Consider these declarations ::</span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

585

</td>

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<pre style="margin: 0;">+<span id="LC585" class="line" lang="plaintext"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="586" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

586

</td>

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<pre style="margin: 0;">+<span id="LC586" class="line" lang="plaintext">   data family T :: forall k. (k->Type) -> k -> Type</span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="587" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

587

</td>

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<pre style="margin: 0;">+<span id="LC587" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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</td>

<td class="diff-line-num new new_line" data-linenumber="588" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

588

</td>

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<pre style="margin: 0;">+<span id="LC588" class="line" lang="plaintext">   data instance T p q where</span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="589" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

589

</td>

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<pre style="margin: 0;">+<span id="LC589" class="line" lang="plaintext">      MkT :: forall r. r Int -> T r Int</span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="590" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

590

</td>

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<pre style="margin: 0;">+<span id="LC590" class="line" lang="plaintext"></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="591" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

591

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<pre style="margin: 0;">+<span id="LC591" class="line" lang="plaintext">Here ``T`` has an invisible kind argument; and perhaps it is instantiated</span>

</pre>

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592

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<pre style="margin: 0;">+<span id="LC592" class="line" lang="plaintext">to ``Type`` in the instance, thus::</span>

</pre>

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593

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<pre style="margin: 0;">+<span id="LC593" class="line" lang="plaintext"></span>

</pre>

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594

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<pre style="margin: 0;">+<span id="LC594" class="line" lang="plaintext">   data instance T @Type (p :: Type->Type) (q :: Type) where</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

595

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<pre style="margin: 0;">+<span id="LC595" class="line" lang="plaintext">      MkT :: forall r. r Int -> T r Int</span>

</pre>

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596

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<pre style="margin: 0;">+<span id="LC596" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="597" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

597

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<pre style="margin: 0;">+<span id="LC597" class="line" lang="plaintext">Or perhaps we intended the specialisation to be in the GADT data</span>

</pre>

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598

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<pre style="margin: 0;">+<span id="LC598" class="line" lang="plaintext">constructor, thus::</span>

</pre>

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599

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<pre style="margin: 0;">+<span id="LC599" class="line" lang="plaintext"></span>

</pre>

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600

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<pre style="margin: 0;">+<span id="LC600" class="line" lang="plaintext">   data instance T @k (p :: k->Type) (q :: k) where</span>

</pre>

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601

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<pre style="margin: 0;">+<span id="LC601" class="line" lang="plaintext">      MkT :: forall r. r Int -> T @Type r Int</span>

</pre>

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602

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<pre style="margin: 0;">+<span id="LC602" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="603" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

603

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<pre style="margin: 0;">+<span id="LC603" class="line" lang="plaintext">It gets more complicated if there are multiple constructors.  In</span>

</pre>

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604

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<pre style="margin: 0;">+<span id="LC604" class="line" lang="plaintext">general, there is no principled way to tell which type specialisation</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="605" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC605" class="line" lang="plaintext">comes from the data instance, and which from the individual GADT data</span>

</pre>

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606

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<pre style="margin: 0;">+<span id="LC606" class="line" lang="plaintext">constructors.</span>

</pre>

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607

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<pre style="margin: 0;">+<span id="LC607" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="608" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

608

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<pre style="margin: 0;">+<span id="LC608" class="line" lang="plaintext">So GHC implements this rule: in data/newtype instance declararations</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="609" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

609

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<pre style="margin: 0;">+<span id="LC609" class="line" lang="plaintext">(unlike ordinary data/newtype declarations) we do *not* look at the</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="610" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

610

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<pre style="margin: 0;">+<span id="LC610" class="line" lang="plaintext">constructor declarations when inferring the shape of the instance</span>

</pre>

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611

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<pre style="margin: 0;">+<span id="LC611" class="line" lang="plaintext">header.  The principle is that *the instantiation of the data instance</span>

</pre>

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612

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<pre style="margin: 0;">+<span id="LC612" class="line" lang="plaintext">should be apparent from the header alone*.  This principle makes the</span>

</pre>

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<pre style="margin: 0;">+<span id="LC613" class="line" lang="plaintext">program easier to understand, and avoids the swamp of complexity</span>

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614

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<pre style="margin: 0;">+<span id="LC614" class="line" lang="plaintext">indicated above.</span>

</pre>

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522

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615

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<pre style="margin: 0;"> <span id="LC615" class="line" lang="plaintext"></span>

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523

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<pre style="margin: 0;">-<span id="LC523" class="line" lang="plaintext">    type family F3 (a :: k) :: k where</span>

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524

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<pre style="margin: 0;">-<span id="LC524" class="line" lang="plaintext">      F3 True  = False</span>

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525

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<pre style="margin: 0;">-<span id="LC525" class="line" lang="plaintext">      F3 False = True</span>

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526

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<pre style="margin: 0;">-<span id="LC526" class="line" lang="plaintext">      F3 x     = x</span>

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527

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<pre style="margin: 0;">-<span id="LC527" class="line" lang="plaintext">    -- OK</span>

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528

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616

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<pre style="margin: 0;"> <span id="LC616" class="line" lang="plaintext"></span>

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617

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<pre style="margin: 0;"> <span id="LC617" class="line" lang="plaintext">Kind inference in class instance declarations</span>

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530

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618

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<pre style="margin: 0;"> <span id="LC618" class="line" lang="plaintext">---------------------------------------------</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="555" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="643" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -555,43 +643,8 @@ infrastructure, and it's not clear the payoff is worth it. If you want</td>

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555

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<pre style="margin: 0;"> <span id="LC643" class="line" lang="plaintext">to restrict ``b``\ 's kind in the instance above, just use a kind</span>

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556

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644

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<pre style="margin: 0;"> <span id="LC644" class="line" lang="plaintext">signature in the instance head.</span>

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557

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645

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<pre style="margin: 0;"> <span id="LC645" class="line" lang="plaintext"></span>

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558

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<pre style="margin: 0;">-<span id="LC558" class="line" lang="plaintext">Kind inference in type signatures</span>

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559

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<pre style="margin: 0;">-<span id="LC559" class="line" lang="plaintext">---------------------------------</span>

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560

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<pre style="margin: 0;">-<span id="LC560" class="line" lang="plaintext"></span>

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<td class="diff-line-num old old_line" data-linenumber="561" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

561

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<pre style="margin: 0;">-<span id="LC561" class="line" lang="plaintext">When kind-checking a type, GHC considers only what is written in that</span>

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562

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<pre style="margin: 0;">-<span id="LC562" class="line" lang="plaintext">type when figuring out how to generalise the type's kind.</span>

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563

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<pre style="margin: 0;">-<span id="LC563" class="line" lang="plaintext"></span>

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564

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC564" class="line" lang="plaintext">For example,</span>

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565

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC565" class="line" lang="plaintext">consider these definitions (with :extension:`ScopedTypeVariables`): ::</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="566" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

566

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC566" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="567" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

567

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC567" class="line" lang="plaintext">  data Proxy a    -- Proxy :: forall k. k -> Type</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="568" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

568

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC568" class="line" lang="plaintext">  p :: forall a. Proxy a</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="569" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

569

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC569" class="line" lang="plaintext">  p = Proxy :: Proxy (a :: Type)</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="570" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

570

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC570" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="571" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

571

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC571" class="line" lang="plaintext">GHC reports an error, saying that the kind of ``a`` should be a kind variable</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="572" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

572

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC572" class="line" lang="plaintext">``k``, not ``Type``. This is because, by looking at the type signature</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="573" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

573

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC573" class="line" lang="plaintext">``forall a. Proxy a``, GHC assumes ``a``'s kind should be generalised, not</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="574" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

574

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC574" class="line" lang="plaintext">restricted to be ``Type``. The function definition is then rejected for being</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="575" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

575

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC575" class="line" lang="plaintext">more specific than its type signature.</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="576" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

576

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<pre style="margin: 0;">-<span id="LC576" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="577" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

577

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC577" class="line" lang="plaintext">.. _explicit-kind-quantification:</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="578" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

578

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<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC578" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="579" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

579

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC579" class="line" lang="plaintext">Explicit kind quantification</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="580" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

580

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC580" class="line" lang="plaintext">----------------------------</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="581" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

581

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC581" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="582" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

582

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC582" class="line" lang="plaintext">Enabled by :extension:`PolyKinds`, GHC supports explicit kind quantification,</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="583" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

583

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC583" class="line" lang="plaintext">as in these examples: ::</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="584" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

584

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC584" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="585" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

585

</td>

<td class="diff-line-num new_line old" data-linenumber="646" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC585" class="line" lang="plaintext">  data Proxy :: forall k. k -> Type</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="586" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

586

</td>

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<pre style="margin: 0;">-<span id="LC586" class="line" lang="plaintext">  f :: (forall k (a :: k). Proxy a -> ()) -> Int</span>

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<pre style="margin: 0;">-<span id="LC587" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC588" class="line" lang="plaintext">Note that the second example has a ``forall`` that binds both a kind ``k`` and</span>

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589

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<pre style="margin: 0;">-<span id="LC589" class="line" lang="plaintext">a type variable ``a`` of kind ``k``. In general, there is no limit to how</span>

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590

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<pre style="margin: 0;">-<span id="LC590" class="line" lang="plaintext">deeply nested this sort of dependency can work. However, the dependency must</span>

</pre>

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591

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<pre style="margin: 0;">-<span id="LC591" class="line" lang="plaintext">be well-scoped: ``forall (a :: k) k. ...`` is an error.</span>

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592

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<pre style="margin: 0;">-<span id="LC592" class="line" lang="plaintext"></span>

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<td class="diff-line-num old old_line" data-linenumber="593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC593" class="line" lang="plaintext">Implicit quantification in type synonyms and type family instances</span>

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<pre style="margin: 0;">-<span id="LC594" class="line" lang="plaintext">------------------------------------------------------------------</span>

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<pre style="margin: 0;">+<span id="LC646" class="line" lang="plaintext">Kind inference in type synonyms and type family instances</span>

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<pre style="margin: 0;">+<span id="LC647" class="line" lang="plaintext">---------------------------------------------------------</span>

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<pre style="margin: 0;"> <span id="LC648" class="line" lang="plaintext"></span>

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<td class="diff-line-num new_line" data-linenumber="649" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC649" class="line" lang="plaintext">Consider the scoping rules for type synonyms and type family instances, such as</span>

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<pre style="margin: 0;"> <span id="LC650" class="line" lang="plaintext">these::</span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="759" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -706,29 +759,44 @@ kinds. Consequently, visible dependent quantifiers are rejected in any context</td>

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<pre style="margin: 0;"> <span id="LC759" class="line" lang="plaintext">that is unambiguously the type of a term. They are also rejected in the types</span>

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<pre style="margin: 0;"> <span id="LC760" class="line" lang="plaintext">of data constructors.</span>

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<pre style="margin: 0;"> <span id="LC761" class="line" lang="plaintext"></span>

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<td class="diff-line-num old old_line" data-linenumber="709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="diff-line-num new_line old" data-linenumber="762" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC709" class="line" lang="plaintext">Kind<span class="idiff left right">-indexed GADT</span>s</span>

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<pre style="margin: 0;">-<span id="LC710" class="line" lang="plaintext">------------------</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC762" class="line" lang="plaintext">Kind<span class="idiff left right"> inference in closed type familie</span>s</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC763" class="line" lang="plaintext">------------------<span class="idiff left right">--------------------</span></span>

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<td class="diff-line-num old_line" data-linenumber="711" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

711

</td>

<td class="diff-line-num new_line" data-linenumber="764" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

764

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC764" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

712

</td>

<td class="diff-line-num new_line old" data-linenumber="765" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC712" class="line" lang="plaintext">Consider the type ::</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="765" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

765

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC765" class="line" lang="plaintext">Although all open type families are considered to have a complete</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="766" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

766

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC766" class="line" lang="plaintext">user-supplied kind signature (:ref:`complete-kind-signatures`),</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="767" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

767

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC767" class="line" lang="plaintext">we can relax this condition for closed</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="768" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

768

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC768" class="line" lang="plaintext">type families, where we have equations on which to perform kind</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="769" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

769

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC769" class="line" lang="plaintext">inference. GHC will infer kinds for the arguments and result types of a</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="770" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

770

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC770" class="line" lang="plaintext">closed type family.</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

713

</td>

<td class="diff-line-num new_line" data-linenumber="771" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

771

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC771" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

714

</td>

<td class="diff-line-num new_line old" data-linenumber="772" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC714" class="line" lang="plaintext">  data G (a :: k) where</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

715

</td>

<td class="diff-line-num new_line old" data-linenumber="772" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC715" class="line" lang="plaintext">    GInt    :: G Int</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

716

</td>

<td class="diff-line-num new_line old" data-linenumber="772" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC716" class="line" lang="plaintext">    GMaybe  :: G Maybe</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="772" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

772

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC772" class="line" lang="plaintext">GHC supports *kind-indexed* type families, where the family matches both</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="773" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

773

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC773" class="line" lang="plaintext">on the kind and type. GHC will *not* infer this behaviour without a</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="774" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

774

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC774" class="line" lang="plaintext">complete user-supplied kind signature or standalone kind</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="775" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

775

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC775" class="line" lang="plaintext">signature (see :ref:`standalone-kind-signatures`),</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="776" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

776

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC776" class="line" lang="plaintext">because doing so would sometimes infer</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="777" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

777

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC777" class="line" lang="plaintext">non-principal types. Indeed, we can see kind-indexing as a form</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="778" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

778

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC778" class="line" lang="plaintext">of polymorphic recursion, where a type is used at a kind other than</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="779" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

779

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC779" class="line" lang="plaintext">its most general in its own definition.</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

717

</td>

<td class="diff-line-num new_line" data-linenumber="780" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

780

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC780" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

718

</td>

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<pre style="margin: 0;">-<span id="LC718" class="line" lang="plaintext">This datatype ``G`` is GADT-like in both its kind and its type. Suppose you</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

719

</td>

<td class="diff-line-num new_line old" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC719" class="line" lang="plaintext">have ``g :: G a``, where ``a :: k``. Then pattern matching to discover that</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

720

</td>

<td class="diff-line-num new_line old" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC720" class="line" lang="plaintext">``g`` is in fact ``GMaybe`` tells you both that ``k ~ (Type -> Type)`` and</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

721

</td>

<td class="diff-line-num new_line old" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC721" class="line" lang="plaintext">``a ~ Maybe``. The definition for ``G`` requires that :extension:`PolyKinds`</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

722

</td>

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<pre style="margin: 0;">-<span id="LC722" class="line" lang="plaintext">be in effect, but pattern-matching on ``G`` requires no extension beyond</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

723

</td>

<td class="diff-line-num new_line old" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC723" class="line" lang="plaintext">:extension:`GADTs`. That this works is actually a straightforward extension</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

724

</td>

<td class="diff-line-num new_line old" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC724" class="line" lang="plaintext">of regular GADTs and a consequence of the fact that kinds and types are the</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="725" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

725

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<pre style="margin: 0;">-<span id="LC725" class="line" lang="plaintext">same.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="781" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

781

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<pre style="margin: 0;">+<span id="LC781" class="line" lang="plaintext">For example: ::</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

726

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<td class="diff-line-num new_line" data-linenumber="782" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

782

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC782" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="727" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

727

</td>

<td class="diff-line-num new_line old" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC727" class="line" lang="plaintext">Note that the datatype ``G`` is used at different kinds in its body, and</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="728" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

728

</td>

<td class="diff-line-num new_line old" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC728" class="line" lang="plaintext">therefore that kind-indexed GADTs use a form of polymorphic recursion.</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

729

</td>

<td class="diff-line-num new_line old" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC729" class="line" lang="plaintext">It is thus only possible to use this feature if you have provided a</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

730

</td>

<td class="diff-line-num new_line old" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC730" class="line" lang="plaintext">complete user-supplied kind signature</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

731

</td>

<td class="diff-line-num new_line old" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC731" class="line" lang="plaintext">for the datatype (:ref:`complete-kind-signatures`).</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="783" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

783

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC783" class="line" lang="plaintext">    type family F1 a where</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="784" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

784

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC784" class="line" lang="plaintext">      F1 True  = False</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="785" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

785

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC785" class="line" lang="plaintext">      F1 False = True</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="786" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

786

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC786" class="line" lang="plaintext">      F1 x     = x</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="787" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

787

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC787" class="line" lang="plaintext">    -- F1 fails to compile: kind-indexing is not inferred</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="788" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

788

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC788" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="789" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

789

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC789" class="line" lang="plaintext">    type family F2 (a :: k) where</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="790" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

790

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC790" class="line" lang="plaintext">      F2 True  = False</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="791" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

791

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC791" class="line" lang="plaintext">      F2 False = True</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="792" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

792

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC792" class="line" lang="plaintext">      F2 x     = x</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="793" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

793

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC793" class="line" lang="plaintext">    -- F2 fails to compile: no complete signature</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

794

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC794" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

795

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC795" class="line" lang="plaintext">    type family F3 (a :: k) :: k where</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

796

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC796" class="line" lang="plaintext">      F3 True  = False</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

797

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC797" class="line" lang="plaintext">      F3 False = True</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="798" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

798

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC798" class="line" lang="plaintext">      F3 x     = x</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

799

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC799" class="line" lang="plaintext">    -- OK</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

732

</td>

<td class="diff-line-num new_line" data-linenumber="800" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

800

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC800" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

733

</td>

<td class="diff-line-num new_line" data-linenumber="801" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

801

</td>

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<pre style="margin: 0;"> <span id="LC801" class="line" lang="plaintext">Higher-rank kinds</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

734

</td>

<td class="diff-line-num new_line" data-linenumber="802" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

802

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC802" class="line" lang="plaintext">-----------------</span>

</pre>

</td>

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</table>

<br>

</li>

<li id="05e2feaa7ccbd427e12a90d25808ead5ec587c63">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#05e2feaa7ccbd427e12a90d25808ead5ec587c63"><strong>testsuite/tests/dependent/should_fail/T13780a.stderr</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -3,7 +3,7 @@ T13780a.hs:9:40: error:</td>

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<td class="diff-line-num old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<td class="diff-line-num new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="plaintext">    • Couldn't match kind ‘a’ with ‘Bool’</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<td class="diff-line-num new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

4

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="plaintext">      Expected kind ‘Foo a’, but ‘MkFoo’ has kind ‘Foo Bool’</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

5

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<td class="diff-line-num new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">      ‘a’ is a rigid type variable bound by</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

6

</td>

<td class="diff-line-num new_line old" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">        <span class="idiff left right">a family instance declaration</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">        <span class="idiff left right">the data constructor ‘SMkFoo’</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<td class="diff-line-num new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<pre style="margin: 0;"> <span id="LC7" class="line" lang="plaintext">        at T13780a.hs:9:20-31</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

8

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<td class="diff-line-num new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

8

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<pre style="margin: 0;"> <span id="LC8" class="line" lang="plaintext">    • In the second argument of ‘(~)’, namely ‘MkFoo’</span>

</pre>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext">      In the definition of data constructor ‘SMkFoo’</span>

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<li id="526bbf30531cad446c3194aa829668c9c4650b0a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#526bbf30531cad446c3194aa829668c9c4650b0a"><strong>testsuite/tests/deriving/should_compile/T11416.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -12,9 +12,11 @@ newtype T f (a :: ConstantT Type f) = T (f a)</td>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">TFam1</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k1</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">TFam1</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConstantT</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">f</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TFam1</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">TFam1</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ConstantT</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="n" style="color: #333;">f</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">                 <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TFam1</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span></span>

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">TFam2</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k1</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">TFam2</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ConstantT</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">f</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TFam2</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">TFam2</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ConstantT</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="n" style="color: #333;">f</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">                 <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TFam2</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span></span></pre>

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<li id="5b83e99d7c85673bbd8af817bf225cf3695013b9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#5b83e99d7c85673bbd8af817bf225cf3695013b9"><strong>testsuite/tests/deriving/should_compile/T9359.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -9,6 +9,5 @@ data Cmp a where</td>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Show</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Eq</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span>   <span class="kt" style="color: #458; font-weight: 600;">CmpInterval</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Cmp</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Cmp</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">CmpInterval</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">V</span> <span class="n" style="color: #333;"><span class="idiff left">c</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff">         </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Sup</span></span><span class="idiff right">         </span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Starting</span> <span class="n" style="color: #333;">c</span></span>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">CmpInterval</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">V</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">c</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Type</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">Sup</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Starting</span> <span class="n" style="color: #333;">c</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="p">)</span></span></pre>

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell"></span></pre>

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<br>

</li>

<li id="f40c9b04fcb3dedd30e8d1d111028fd38a3bd533">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#f40c9b04fcb3dedd30e8d1d111028fd38a3bd533"><strong>testsuite/tests/indexed-types/should_compile/T14111.hs</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MagicHash, UnboxedSums, NoImplicitPrelude #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies #-}</span></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- {-# LANGUAGE PolyKinds #-}</span></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MultiParamTypeClasses #-}</span></span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FunctionalDependencies #-}</span></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeInType #-}</span></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs ,ExplicitNamespaces#-}</span></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</span></span>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

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10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T14111</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

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13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Prelude</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">undefined</span><span class="p">)</span></span>

</pre>

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15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Kind</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Void</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

17

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

18

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span><span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="19" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

19

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

20

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="21" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

21

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MaybeSum</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">a</span>  <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

22

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

23

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="kt" style="color: #458; font-weight: 600;">'UnliftedRep</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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24

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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MaybeSumU</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">x</span></span></pre>

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<br>

</li>

<li id="ebaa39285a49455fd932d452d44b589c7d50f8f3">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#ebaa39285a49455fd932d452d44b589c7d50f8f3"><strong>testsuite/tests/indexed-types/should_compile/T8707.hs</strong></a>

<hr>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies, PolyKinds, DataKinds, GADTs #-}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T8707</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Kind</span></span>

</pre>

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

</pre>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">SingDF</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">k</span><span class="p">,</span> <span class="n" style="color: #333;">k2</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Ctor</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

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10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">SingDF</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">))</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">SFalse</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SingDF</span> <span class="n" style="color: #333;">'</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ctor</span><span class="p">)</span></span></pre>

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<br>

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<li id="58b9bc2ffb1c7d7b545e6aada524a5d53266e95e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#58b9bc2ffb1c7d7b545e6aada524a5d53266e95e"><strong>testsuite/tests/indexed-types/should_compile/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -300,3 +300,5 @@ test('T18809', normal, compile, ['-O'])</td>

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<pre style="margin: 0;"> <span id="LC300" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">CEqCanOccursCheck</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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301

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301

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<pre style="margin: 0;"> <span id="LC301" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">GivenLoop</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC302" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18875</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC303" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T8707</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O</span><span class="p">'])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC304" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T14111</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">-O</span><span class="p">'])</span></span></pre>

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<br>

</li>

<li id="9ce3533e3d2bdc2ed2d290e31021207c39fd5729">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#9ce3533e3d2bdc2ed2d290e31021207c39fd5729"><strong>testsuite/tests/indexed-types/should_fail/T8368.stderr</strong></a>

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1

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<td class="diff-line-num new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">T8368.hs:9:3:</span>

</pre>

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3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    Data constructor ‘MkFam’ returns type ‘Foo’</span>

</pre>

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4

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">      instead of an instance of its parent type ‘Fam a’</span>

</pre>

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5

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<td class="diff-line-num new_line old" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">    In the definition of data constructor ‘MkFam’</span>

</pre>

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6

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">    In the data instance declaration for ‘Fam’</span></pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T8368.hs:9:3: error:</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match expected type ‘Fam a0’ with actual type ‘Foo’</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the result type of data constructor ‘MkFam’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">      In the data instance declaration for ‘Fam’</span></pre>

</td>

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<br>

</li>

<li id="022292799466b9b31e4522069903c5b0fac15e9c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#022292799466b9b31e4522069903c5b0fac15e9c"><strong>testsuite/tests/indexed-types/should_fail/T8368a.stderr</strong></a>

<hr>

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1

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<td class="diff-line-num new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

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2

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">T8368a.hs:7:3:</span>

</pre>

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3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    Data constructor ‘MkFam’ returns type ‘Fam Bool b’</span>

</pre>

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4

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">      instead of an instance of its parent type ‘Fam Int b’</span>

</pre>

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5

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">    In the definition of data constructor ‘MkFam’</span>

</pre>

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6

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">    In the data instance declaration for ‘Fam’</span></pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T8368a.hs:7:3: error:</span>

</pre>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match type ‘Bool’ with ‘Int’</span>

</pre>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      Expected: Fam Int b</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">        Actual: Fam Bool b</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">    • In the result type of data constructor ‘MkFam’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext">      In the data instance declaration for ‘Fam’</span></pre>

</td>

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<br>

</li>

<li id="bc4ffdf271cd138b7e3e72937084080b70f4e95b">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#bc4ffdf271cd138b7e3e72937084080b70f4e95b"><strong>testsuite/tests/patsyn/should_fail/T15685.stderr</strong></a>

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1

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<td class="diff-line-num new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

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2

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext">T15685.hs:13:24: error:</span>

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Could not deduce: <span class="idiff left right">a</span> ~ [k0]</span>

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4

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">      from the context: as ~ (a<span class="idiff left right">1</span> : as1)</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Could not deduce: <span class="idiff left right">k</span> ~ [k0]</span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      from the context: as ~ (a : as1)</span>

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5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">        bound by a pattern with constructor:</span>

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6

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">                   Here :: forall {<span class="idiff left right">a1} (f :: a1 -> *) (a2 :: a1) (as :: [a1</span>]).</span>

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7

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<pre style="margin: 0;">-<span id="LC7" class="line" lang="plaintext">                           f a<span class="idiff left right">2 -> NS f (a2</span> : as),</span>

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">                   Here :: forall {<span class="idiff left right">k} (f :: k -> *) (a :: k) (as :: [k</span>]).</span>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext">                           f a<span class="idiff left right"> -> NS f (a</span> : as),</span>

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8

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<pre style="margin: 0;"> <span id="LC8" class="line" lang="plaintext">                 in a pattern synonym declaration</span>

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9

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="plaintext">        at T15685.hs:13:19-26</span>

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10

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<pre style="margin: 0;">-<span id="LC10" class="line" lang="plaintext">      ‘<span class="idiff left right">a</span>’ is a rigid type variable bound by</span>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext">      ‘<span class="idiff left right">k</span>’ is a rigid type variable bound by</span>

</pre>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="plaintext">        the inferred type of HereNil :: NS f as</span>

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12

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="plaintext">        at T15685.hs:13:9-15</span>

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13

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="plaintext">      Possible fix: add a type signature for ‘HereNil’</span>

</pre>

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<br>

</li>

<li id="9cf9e43ad6ba49c6f9ba05365e796e4358376763">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#9cf9e43ad6ba49c6f9ba05365e796e4358376763"><strong>testsuite/tests/polykinds/T13659.stderr</strong></a>

<hr>

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1

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">T13659.hs:14:<span class="idiff left right">27</span>: error:</span>

</pre>

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3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Expected <span class="idiff left right">a type, but ‘a’ has kind ‘[*]</span>’</span>

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4

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">    • In the first argument of ‘Format’, namely ‘<span class="idiff left right">'[Int, a]</span>’</span>

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">      In the type ‘Format <span class="idiff left right">'[Int, a]</span>’</span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T13659.hs:14:<span class="idiff left right">15</span>: error:</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Expected <span class="idiff left right">kind ‘[*]’, but ‘a’ has kind ‘*</span>’</span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the first argument of ‘Format’, namely ‘<span class="idiff left right">a</span>’</span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">      In the type ‘Format <span class="idiff left right">a</span>’</span>

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">      In the definition of data constructor ‘I’</span></pre>

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<br>

</li>

<li id="4af4eaeded9c126e6a4ee186db90f5b886b80799">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#4af4eaeded9c126e6a4ee186db90f5b886b80799"><strong>testsuite/tests/polykinds/T16221a.stderr</strong></a>

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext">T16221a.hs:6:49: error:</span>

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Expected kind ‘k’, but ‘b’ has kind ‘k<span class="idiff left right">1</span>’</span>

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">      ‘k<span class="idiff left right">1</span>’ is a rigid type variable bound by</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Expected kind ‘k’, but ‘b’ has kind ‘k<span class="idiff left right">2</span>’</span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      ‘k<span class="idiff left right">2</span>’ is a rigid type variable bound by</span>

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="plaintext">        an explicit forall k (b :: k)</span>

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="plaintext">        at T16221a.hs:6:20</span>

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<pre style="margin: 0;"> <span id="LC7" class="line" lang="plaintext">      ‘k’ is a rigid type variable bound by</span>

</pre>

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<br>

</li>

<li id="5c74fb2bdbb2042694ffd2e618b0efb408c68d8e">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#5c74fb2bdbb2042694ffd2e618b0efb408c68d8e"><strong>testsuite/tests/th/T11145.stderr</strong></a>

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<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC2" class="line" lang="plaintext">T11145.hs:8:1: error:</span>

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">    • Data constructor ‘MkFuggle’ returns type ‘Fuggle</span>

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">                                                  Int (Maybe Bool)’</span>

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext">        instead of an instance of its parent type ‘Fuggle</span>

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6

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">                                                     Int (Maybe (a, b))’</span>

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<pre style="margin: 0;">-<span id="LC7" class="line" lang="plaintext">    • In the definition of data constructor ‘MkFuggle’</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Couldn't match type ‘Bool’ with ‘(a0, b0)’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      Expected: Fuggle Int (Maybe (a0, b0))</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">        Actual: Fuggle Int (Maybe Bool)</span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">    • In the result type of data constructor ‘MkFuggle’</span>

</pre>

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<pre style="margin: 0;"> <span id="LC7" class="line" lang="plaintext">      In the data instance declaration for ‘Fuggle’</span></pre>

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<br>

</li>

<li id="963e82a98233f65b20b6eed015bb2bd423433593">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#963e82a98233f65b20b6eed015bb2bd423433593"><strong>testsuite/tests/th/T9692.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -12,7 +12,7 @@ class C a where</td>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">C</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC15" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="n" style="color: #333;"><span class="idiff left right">x</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FInt</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">F</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Type</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">FInt</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"><span class="o" style="font-weight: 600;">$</span><span class="p">(</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">qReify</span> <span class="p">(</span><span class="n" style="color: #333;">mkName</span> <span class="s" style="color: #d14;">"F"</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell">      <span class="n" style="color: #333;">runIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">putStrLn</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">pprint</span> <span class="n" style="color: #333;">info</span></span>

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<li id="dac489fd9971f93cf5f4c1655e3ab898e190a541">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#dac489fd9971f93cf5f4c1655e3ab898e190a541"><strong>testsuite/tests/typecheck/should_compile/T18891.hs</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs, UnliftedNewtypes, StandaloneKindSignatures, RankNTypes, TypeFamilies, PolyKinds #-}</span></span>

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18891</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">T2</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">T2</span> <span class="n" style="color: #333;">a</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkT2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">T2</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">N3</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkN3</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">N3</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">N3</span> <span class="n" style="color: #333;">m</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">N4</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">N4</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkN4</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">N4</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">N4</span> <span class="n" style="color: #333;">m</span></span></pre>

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<br>

</li>

<li id="460a0a2288242ede875741a395ec8673b7a822d0">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#460a0a2288242ede875741a395ec8673b7a822d0"><strong>testsuite/tests/typecheck/should_compile/UnliftedNewtypesUnassociatedFamily.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -4,6 +4,8 @@</td>

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4

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4

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE PolyKinds #-}</span></span>

</pre>

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5

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5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MagicHash #-}</span></span>

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</span></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs #-}</span></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeApplications #-}</span></span>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">UnliftedNewtypesUnassociatedFamily</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -20,7 +22,16 @@ newtype instance DFT ('TupleRep '[ 'IntRep, 'WordRep])</td>

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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DFT</span> <span class="kt" style="color: #458; font-weight: 600;">'LiftedRep</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDFT4</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MkDFT5</span></span>

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF1</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span></span>

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<pre style="margin: 0;">-<span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF2</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span></span>

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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF3</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Use a type application</span></span>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">IntRep</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF1</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Use a kind signature</span></span>

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<td class="diff-line-num new new_line" data-linenumber="30" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="kt" style="color: #458; font-weight: 600;">'WordRep</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkDF2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DF</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Also uses a kind signature</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">'TupleRep</span> <span class="n" style="color: #333;">'</span><span class="p">[</span> <span class="kt" style="color: #458; font-weight: 600;">'IntRep</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">'WordRep</span> <span class="p">])</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkDF3</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DF</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF4</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF5</span></span></pre>

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<br>

</li>

<li id="8a9c9b7ef8854c111f962e63af9191c2300a6382">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#8a9c9b7ef8854c111f962e63af9191c2300a6382"><strong>testsuite/tests/typecheck/should_compile/UnliftedNewtypesUnifySig.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -10,14 +10,14 @@</td>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">UnliftedNewtypesUnassociatedFamily</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Int</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IntRep</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IntRep</span><span class="p"><span class="idiff left">,</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">WordRep</span></span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TYPE</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">KindOf</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">k</span></span>

</pre>

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17

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17

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"></span>

</pre>

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18

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18

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">r</span></span>

</pre>

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19

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19

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"></span>

</pre>

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20

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<pre style="margin: 0;">-<span id="LC20" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="n" style="color: #333;"><span class="idiff left right">a</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkWordD</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">a</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TYPE</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">'WordRep</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkWordD</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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21

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21

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"></span>

</pre>

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22

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<pre style="margin: 0;">-<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="n" style="color: #333;"><span class="idiff left right">a</span></span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">KindOf</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

23

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<td class="diff-line-num new_line old" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC23" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkIntD</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;"><span class="idiff left">a</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Int</span></span><span class="o" style="font-weight: 600;"><span class="idiff">#</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">D</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">a</span></span></span></pre>

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">D</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">a</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TYPE</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">'IntRep</span></span><span class="p"><span class="idiff right">)</span></span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">KindOf</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkIntD</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">b</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TYPE</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">'IntRep</span></span><span class="p"><span class="idiff">)</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Int</span></span><span class="o" style="font-weight: 600;"><span class="idiff">#</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">D</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">b</span></span></span></pre>

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</li>

<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/should_compile/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -736,3 +736,4 @@ test('InstanceGivenOverlap', normal, compile, [''])</td>

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<pre style="margin: 0;"> <span id="LC736" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">InstanceGivenOverlap2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC737" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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738

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<pre style="margin: 0;"> <span id="LC738" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

739

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<pre style="margin: 0;">+<span id="LC739" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18891</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span></pre>

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<br>

</li>

<li id="4968e845853db814d0441fbf636d7b942d6beca2">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#4968e845853db814d0441fbf636d7b942d6beca2"><strong>testsuite/tests/typecheck/should_fail/T18891a.hs</strong></a>

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<td class="diff-line-num new new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs, UnliftedNewtypes, StandaloneKindSignatures, RankNTypes, TypeFamilies, PolyKinds #-}</span></span>

</pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18891</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">N1</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell">   <span class="kt" style="color: #458; font-weight: 600;">MkN1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">N1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">N1</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

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10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">N2</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">N2</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">k</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkN2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">N2</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">N2</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span></pre>

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<br>

</li>

<li id="00704c21d708b5b0eae6c68bd8d6a0559be1c753">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#00704c21d708b5b0eae6c68bd8d6a0559be1c753"><strong>testsuite/tests/typecheck/should_fail/T18891a.stderr</strong></a>

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<td class="diff-line-num new new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>

</pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18891a.hs:8:4: error:</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • A newtype constructor must have a return type of form T a1 ... an</span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">      MkN1 :: N1 -> N1</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">    • In the definition of data constructor ‘MkN1’</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">      In the newtype declaration for ‘N1’</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext">T18891a.hs:12:3: error:</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">    • A newtype constructor must have a return type of form T a1 ... an</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext">      MkN2 :: N2 -> N2</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext">    • In the definition of data constructor ‘MkN2’</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext">      In the newtype declaration for ‘N2’</span></pre>

</td>

</tr>

</table>

<br>

</li>

<li id="9d34b8cddaf28088631549895343f495bc16ad14">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#9d34b8cddaf28088631549895343f495bc16ad14"><strong>testsuite/tests/typecheck/should_fail/UnliftedNewtypesFamilyKindFail2.stderr</strong></a>

<hr>

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<td class="diff-line-num old old_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1" class="line" lang="plaintext">UnliftedNewtypesFamilyKindFail2.hs:12:20:</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

2

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="plaintext">     Expected a type, but ‘5’ has kind ‘GHC.Num.Natural.Natural’</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="3" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

3

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC3" class="line" lang="plaintext">     In the first argument of ‘F’, namely ‘5’</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

4

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC4" class="line" lang="plaintext">      In the newtype instance declaration for ‘F’</span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

5

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC5" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

6

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="plaintext">UnliftedNewtypesFamilyKindFail2.hs:12:31:</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

7

</td>

<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC7" class="line" lang="plaintext">     Expected a type, but ‘5’ has kind ‘GHC.Num.Natural.Natural’</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

8

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<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC8" class="line" lang="plaintext">     In the first argument of ‘F’, namely ‘5’</span>

</pre>

</td>

</tr>

<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

9

</td>

<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC9" class="line" lang="plaintext">      In the type ‘(F 5)’</span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

10

</td>

<td class="diff-line-num new_line old" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC10" class="line" lang="plaintext">      In the definition of data constructor ‘MkF’</span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

11

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<td class="diff-line-num new_line" data-linenumber="1" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">UnliftedNewtypesFamilyKindFail2.hs:12:20: error:</span>

</pre>

</td>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Expected a type, but ‘5’ has kind ‘GHC.Num.Natural.Natural’</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the first argument of ‘F’, namely ‘5’</span>

</pre>

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">      In the newtype instance declaration for ‘F’</span></pre>

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<br>

</li>

<li id="b66ac8a3829a9ca3a4bbfecd10731b973b1e5f1a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#b66ac8a3829a9ca3a4bbfecd10731b973b1e5f1a"><strong>testsuite/tests/typecheck/should_fail/UnliftedNewtypesUnassociatedFamilyFail.hs</strong></a>

<hr>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnliftedNewtypes #-}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE DataKinds #-}</span></span>

</pre>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies #-}</span></span>

</pre>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE PolyKinds #-}</span></span>

</pre>

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5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE MagicHash #-}</span></span>

</pre>

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE UnboxedTuples #-}</span></span>

</pre>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GADTs #-}</span></span>

</pre>

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8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>

</pre>

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9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">UnliftedNewtypesUnassociatedFamily</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Int</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Word</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">W</span><span class="o" style="font-weight: 600;">#</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TYPE</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LiftedRep</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">IntRep</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">WordRep</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">TupleRep</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="n" style="color: #333;">family</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span> <span class="p">(</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- All these fail: see #18891 and !4419</span></span>

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Kind inference for data family instances]</span></span>

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- in GHC.Tc.TyCl.Instance</span></span>

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF1a</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span></span>

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF2a</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span></span>

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">DF</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MkDF3a</span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Word</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span></pre>

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</li>

<li id="f7d92892f9d0ace042113231c65d6e509b3393d3">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#f7d92892f9d0ace042113231c65d6e509b3393d3"><strong>testsuite/tests/typecheck/should_fail/UnliftedNewtypesUnassociatedFamilyFail.stderr</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">UnliftedNewtypesUnassociatedFamilyFail.hs:21:30: error:</span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext">    • Expecting a lifted type, but ‘Int#’ is unlifted</span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext">    • In the type ‘Int#’</span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext">      In the definition of data constructor ‘MkDF1a’</span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="plaintext">      In the newtype instance declaration for ‘DF’</span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="plaintext">UnliftedNewtypesUnassociatedFamilyFail.hs:22:30: error:</span>

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="plaintext">    • Expecting a lifted type, but ‘Word#’ is unlifted</span>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="plaintext">    • In the type ‘Word#’</span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="plaintext">      In the definition of data constructor ‘MkDF2a’</span>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="plaintext">      In the newtype instance declaration for ‘DF’</span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="plaintext">UnliftedNewtypesUnassociatedFamilyFail.hs:23:30: error:</span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="plaintext">    • Expecting a lifted type, but ‘(# Int#, Word# #)’ is unlifted</span>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="plaintext">    • In the type ‘(# Int#, Word# #)’</span>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="plaintext">      In the definition of data constructor ‘MkDF3a’</span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="plaintext">      In the newtype instance declaration for ‘DF’</span></pre>

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<br>

</li>

<li id="b9e86d897a62509b0114d81d5e736630d6f68f43">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/727264bde42c7c14e5452c68463051005ef5cfb4#b9e86d897a62509b0114d81d5e736630d6f68f43"><strong>testsuite/tests/typecheck/should_fail/all.T</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -546,6 +546,7 @@ test('UnliftedNewtypesConstraintFamily', normal, compile_fail, [''])</td>

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<pre style="margin: 0;"> <span id="LC546" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesMismatchedKind</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC547" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesMismatchedKindRecord</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC548" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesMultiFieldGadt</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;">+<span id="LC549" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">UnliftedNewtypesUnassociatedFamilyFail</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC550" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T13834</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC551" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T17077</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC552" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16512a</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="591" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="592" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -591,3 +592,4 @@ test('T18640c', normal, compile_fail, [''])</td>

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<pre style="margin: 0;"> <span id="LC592" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T10709</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

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<pre style="margin: 0;"> <span id="LC593" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T10709b</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="593" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

593

</td>

<td class="diff-line-num new_line" data-linenumber="594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

594

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<pre style="margin: 0;"> <span id="LC594" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">GivenForallLoop</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="595" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

595

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC595" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18891a</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span></pre>

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