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<h3>

 Marge Bot pushed to branch wip/marge_bot_batch_merge_job

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/d5c014802300f564358c8fc96e663d4ff189d7f3">d5c01480</a></strong>

<div>

<span>by Andreas Klebinger</span>

<i>at 2020-03-18T20:09:04Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update "GHC differences to the FFI Chapter" in user guide.

The old entry had a heavy focus on how things had been. Which is

not what I generally look for in a user guide.

I also added a small section on behaviour of nested safe ffi calls.

[skip-ci]

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/336767f94b296377c59e73e8183e0d4934791485">336767f9</a></strong>

<div>

<span>by Sebastian Graf</span>

<i>at 2020-03-18T20:09:10Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Use ConLikeSet to model negative info

In #17911, Simon recognised many warnings stemming from over-long list

unions while coverage checking Cabal's `LicenseId` module.

This patch introduces a new `PmAltConSet` type which uses a `UniqDSet`

instead of an association list for `ConLike`s. For `PmLit`s, it will

still use an assocation list, though, because a similar map data

structure would entail a lot of busy work.

Fixes #17911.

</pre>

</li>

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<h4>3 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#8d8e5922fde8bc19ffa2bc9cae6b6720abb88564">

compiler/GHC/HsToCore/PmCheck/Oracle.hs

</a>

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<li class="file-stats">

<a href="#a90b29966ba2a86c0f6927651648cb062f00ea03">

compiler/GHC/HsToCore/PmCheck/Types.hs

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<li class="file-stats">

<a href="#f1fb2cbc6312f41f6aac14d2046c24ce0c5cbea2">

docs/users_guide/exts/ffi.rst

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<h4>Changes:</h4>

<li id="8d8e5922fde8bc19ffa2bc9cae6b6720abb88564">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/677442333b9cce270a05f70e29dcd5df36f26d2b...336767f94b296377c59e73e8183e0d4934791485#8d8e5922fde8bc19ffa2bc9cae6b6720abb88564"><strong>compiler/GHC/HsToCore/PmCheck/Oracle.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="51" style="width: 35px; color: rgba(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="51" style="width: 35px; color: rgba(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">@@ -51,7 +51,6 @@ import GHC.Core.Make      (mkListExpr, mkCharExpr)</td>

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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">UniqSupply</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">FastString</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">SrcLoc</span></span>

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<pre style="margin: 0;">-<span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ListSetOps</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unionLists</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.ConLike</span></span>

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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="613" style="width: 35px; color: rgba(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="612" style="width: 35px; color: rgba(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">@@ -613,9 +612,6 @@ Maintaining these invariants in 'addVarCt' (the core of the term oracle) and</td>

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<td class="diff-line-num new_line" data-linenumber="612" style="width: 35px; color: rgba(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="LC612" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - (Refine) If we had @x /~ K zs@, unify each y with each z in turn.</span></span>

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<pre style="margin: 0;"> <span id="LC613" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Adding negative information. Example: Add the fact @x /~ Nothing@ (see 'addNotConCt')</span></span>

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<pre style="margin: 0;"> <span id="LC614" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - (Refut) If we have @x ~ K ys@, refute.</span></span>

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<td class="diff-line-num old old_line" data-linenumber="616" style="width: 35px; color: rgba(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="615" style="width: 35px; color: rgba(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="LC616" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - (Redundant) If we have @x ~ K2@ and @eqPmAltCon K K2 == Disjoint@</span></span>

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<pre style="margin: 0;">-<span id="LC617" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (ex. Just and Nothing), the info is redundant and can be</span></span>

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<td class="diff-line-num old old_line" data-linenumber="618" style="width: 35px; color: rgba(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="LC618" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    discarded.</span></span>

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<td class="diff-line-num old_line" data-linenumber="619" style="width: 35px; color: rgba(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="LC615" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  - (COMPLETE) If K=Nothing and we had @x /~ Just@, then we get</span></span>

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<pre style="margin: 0;"> <span id="LC616" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    @x /~ [Just,Nothing]@. This is vacuous by matter of comparing to the built-in</span></span>

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<pre style="margin: 0;"> <span id="LC617" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    COMPLETE set, so should refute.</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="655" style="width: 35px; color: rgba(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="651" style="width: 35px; color: rgba(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">@@ -655,7 +651,7 @@ tmIsSatisfiable new_tm_cs = SC $ \delta -> runMaybeT $ foldlM addTmCt delta new_</td>

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655

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<pre style="margin: 0;"> <span id="LC651" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- * Looking up VarInfo</span></span>

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<pre style="margin: 0;"> <span id="LC652" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC653" class="line" lang="haskell"><span class="n" style="color: #333;">emptyVarInfo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span></span>

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<pre style="margin: 0;">-<span id="LC658" class="line" lang="haskell"><span class="n" style="color: #333;">emptyVarInfo</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;">VI</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">[]</span></span> <span class="kt" style="color: #458; font-weight: 600;">NoPM</span></span>

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<pre style="margin: 0;">+<span id="LC654" class="line" lang="haskell"><span class="n" style="color: #333;">emptyVarInfo</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;">VI</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;"><span class="idiff left right">emptyPmAltConSet</span></span> <span class="kt" style="color: #458; font-weight: 600;">NoPM</span></span>

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659

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<pre style="margin: 0;"> <span id="LC655" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC656" class="line" lang="haskell"><span class="n" style="color: #333;">lookupVarInfo</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">VarInfo</span></span>

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<pre style="margin: 0;"> <span id="LC657" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (lookupVarInfo tms x) tells what we know about 'x'</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="750" style="width: 35px; color: rgba(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">@@ -754,7 +750,7 @@ TyCon, so tc_rep = tc_fam afterwards.</td>

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<pre style="margin: 0;"> <span id="LC750" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Delta</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;"> <span id="LC751" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="n" style="color: #333;">delta</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkDelta</span><span class="p">{</span> <span class="n" style="color: #333;">delta_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span> <span class="p">}</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;"> <span id="LC752" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupVarInfo</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;">-<span id="LC757" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">null</span></span> <span class="n" style="color: #333;">neg</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">pos_can_diverge</span> <span class="n" style="color: #333;">pos</span></span>

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<pre style="margin: 0;">+<span id="LC753" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">isEmptyPmAltConSet</span></span> <span class="n" style="color: #333;">neg</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">pos_can_diverge</span> <span class="n" style="color: #333;">pos</span></span>

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758

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754

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<pre style="margin: 0;"> <span id="LC754" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<td class="diff-line-num new_line" data-linenumber="755" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

755

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<pre style="margin: 0;"> <span id="LC755" class="line" lang="haskell">    <span class="n" style="color: #333;">pos_can_diverge</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">),</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">y</span><span class="p">])</span></span>

</pre>

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760

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<td class="diff-line-num new_line" data-linenumber="756" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

756

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<pre style="margin: 0;"> <span id="LC756" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- See Note [Divergence of Newtype matches]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="793" style="width: 35px; color: rgba(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="789" style="width: 35px; color: rgba(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">@@ -793,8 +789,8 @@ lookupRefuts :: Uniquable k => Delta -> k -> [PmAltCon]</td>

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793

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<pre style="margin: 0;"> <span id="LC789" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefuts</span> <span class="kt" style="color: #458; font-weight: 600;">MkDelta</span><span class="p">{</span> <span class="n" style="color: #333;">delta_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ts</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDIE</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="p">}</span> <span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

794

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<td class="diff-line-num new_line" data-linenumber="790" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

790

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<pre style="margin: 0;"> <span id="LC790" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupUDFM</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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795

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<td class="diff-line-num new_line" data-linenumber="791" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

791

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<pre style="margin: 0;"> <span id="LC791" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="792" style="width: 35px; color: rgba(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="LC796" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Indirect</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left">vi_neg</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">lookupVarInfo</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">y</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="797" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

797

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<td class="diff-line-num new_line old" data-linenumber="792" style="width: 35px; color: rgba(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="LC797" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Entry</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span>   <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left">vi_neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">vi</span></span></span>

</pre>

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<td class="diff-line-num new old_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">

</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

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<pre style="margin: 0;">+<span id="LC792" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Indirect</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left">pmAltConSetElems</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_neg</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">lookupVarInfo</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ts</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</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="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">

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<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

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<pre style="margin: 0;">+<span id="LC793" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Entry</span> <span class="n" style="color: #333;">vi</span><span class="p">)</span>   <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;"><span class="idiff left">pmAltConSetElems</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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798

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<td class="diff-line-num new_line" data-linenumber="794" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

794

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<pre style="margin: 0;"> <span id="LC794" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="799" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

799

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<td class="diff-line-num new_line" data-linenumber="795" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

795

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<pre style="margin: 0;"> <span id="LC795" class="line" lang="haskell"><span class="n" style="color: #333;">isDataConSolution</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">,</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;">Id</span><span class="p">])</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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800

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<td class="diff-line-num new_line" data-linenumber="796" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

796

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<pre style="margin: 0;"> <span id="LC796" class="line" lang="haskell"><span class="n" style="color: #333;">isDataConSolution</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">),</span> <span class="kr" style="font-weight: 600;">_</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="kt" style="color: #458; font-weight: 600;">True</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="937" style="width: 35px; color: rgba(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="933" style="width: 35px; color: rgba(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">@@ -937,7 +933,7 @@ addNotConCt delta@MkDelta{ delta_tm_st = TmSt env reps } x nalt = do</td>

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937

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<td class="diff-line-num new_line" data-linenumber="933" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

933

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<pre style="margin: 0;"> <span id="LC933" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">implies</span> <span class="n" style="color: #333;">nalt</span><span class="p">)</span> <span class="n" style="color: #333;">pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</span></span>

</pre>

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938

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<td class="diff-line-num new_line" data-linenumber="934" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

934

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<pre style="margin: 0;"> <span id="LC934" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- See Note [Completeness checking with required Thetas]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="939" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

939

</td>

<td class="diff-line-num new_line" data-linenumber="935" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

935

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<pre style="margin: 0;"> <span id="LC935" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">hasRequiredTheta</span> <span class="n" style="color: #333;">nalt</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="940" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

940

</td>

<td class="diff-line-num new_line old" data-linenumber="936" style="width: 35px; color: rgba(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="LC940" 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;"><span class="idiff left">unionLists</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="n" style="color: #333;"><span class="idiff">nalt</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="941" style="width: 35px; color: rgba(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="936" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

936

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<pre style="margin: 0;">+<span id="LC936" 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;"><span class="idiff left">extendPmAltConSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">nalt</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="941" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

941

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<td class="diff-line-num new_line" data-linenumber="937" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

937

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<pre style="margin: 0;"> <span id="LC937" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">vi_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">vi</span><span class="p">{</span> <span class="n" style="color: #333;">vi_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg'</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="942" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

942

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<td class="diff-line-num new_line" data-linenumber="938" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

938

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<pre style="margin: 0;"> <span id="LC938" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- 3. Make sure there's at least one other possible constructor</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="943" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

943

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<td class="diff-line-num new_line" data-linenumber="939" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

939

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<pre style="margin: 0;"> <span id="LC939" class="line" lang="haskell">  <span class="n" style="color: #333;">vi'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">nalt</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1129" style="width: 35px; color: rgba(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="1125" style="width: 35px; color: rgba(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">@@ -1129,7 +1125,7 @@ equate delta@MkDelta{ delta_tm_st = TmSt env reps } x y</td>

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<td class="diff-line-num old_line" data-linenumber="1129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1129

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<td class="diff-line-num new_line" data-linenumber="1125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1125

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<pre style="margin: 0;"> <span id="LC1125" class="line" lang="haskell">        <span class="n" style="color: #333;">delta_pos</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">add_fact</span> <span class="n" style="color: #333;">delta_refs</span> <span class="p">(</span><span class="n" style="color: #333;">vi_pos</span> <span class="n" style="color: #333;">vi_x</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1130

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<td class="diff-line-num new_line" data-linenumber="1126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1126

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<pre style="margin: 0;"> <span id="LC1126" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Do the same for negative info</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1131

</td>

<td class="diff-line-num new_line" data-linenumber="1127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1127

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<pre style="margin: 0;"> <span id="LC1127" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">add_refut</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addNotConCt</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">nalt</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1132" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1132

</td>

<td class="diff-line-num new_line old" data-linenumber="1128" style="width: 35px; color: rgba(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="LC1132" class="line" lang="haskell">        <span class="n" style="color: #333;">delta_neg</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">add_refut</span> <span class="n" style="color: #333;">delta_pos</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">vi_neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">vi_x</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1133" style="width: 35px; color: rgba(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="n" style="color: #333;">delta_neg</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">add_refut</span> <span class="n" style="color: #333;">delta_pos</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">pmAltConSetElems</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vi_neg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">vi_x</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1133" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1133

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<td class="diff-line-num new_line" data-linenumber="1129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1129

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<pre style="margin: 0;"> <span id="LC1129" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- vi_cache will be updated in addNotConCt, so we are good to</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1134" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1134

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<td class="diff-line-num new_line" data-linenumber="1130" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1130

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<pre style="margin: 0;"> <span id="LC1130" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- go!</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1135" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1135

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<td class="diff-line-num new_line" data-linenumber="1131" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1131

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<pre style="margin: 0;"> <span id="LC1131" class="line" lang="haskell">        <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">delta_neg</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1144" style="width: 35px; color: rgba(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="1140" style="width: 35px; color: rgba(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">@@ -1144,7 +1140,7 @@ addConCt :: Delta -> Id -> PmAltCon -> [TyVar] -> [Id] -> MaybeT DsM Delta</td>

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1144

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<td class="diff-line-num new_line" data-linenumber="1140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1140

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<pre style="margin: 0;"> <span id="LC1140" class="line" lang="haskell"><span class="n" style="color: #333;">addConCt</span> <span class="n" style="color: #333;">delta</span><span class="o" style="font-weight: 600;">@</span><span class="kt" style="color: #458; font-weight: 600;">MkDelta</span><span class="p">{</span> <span class="n" style="color: #333;">delta_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">reps</span> <span class="p">}</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">tvs</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1145

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<td class="diff-line-num new_line" data-linenumber="1141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1141

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<pre style="margin: 0;"> <span id="LC1141" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">cache</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lift</span> <span class="p">(</span><span class="n" style="color: #333;">initLookupVarInfo</span> <span class="n" style="color: #333;">delta</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1146

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<td class="diff-line-num new_line" data-linenumber="1142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1142

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<pre style="margin: 0;"> <span id="LC1142" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- First try to refute with a negative fact</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1147" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1147

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<td class="diff-line-num new_line old" data-linenumber="1143" style="width: 35px; color: rgba(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="LC1147" class="line" lang="haskell">  <span class="n" style="color: #333;">guard</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">all</span></span><span class="idiff"> </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">Equal</span></span><span class="p"><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="n" style="color: #333;"><span class="idiff">eqPmAltCon</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">alt</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">neg</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1148" style="width: 35px; color: rgba(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="1143" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1143

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<pre style="margin: 0;">+<span id="LC1143" class="line" lang="haskell">  <span class="n" style="color: #333;">guard</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">not</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">elemPmAltConSet</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">alt</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">neg</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1148

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<td class="diff-line-num new_line" data-linenumber="1144" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1144

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<pre style="margin: 0;"> <span id="LC1144" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Then see if any of the other solutions (remember: each of them is an</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1149" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1149

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<td class="diff-line-num new_line" data-linenumber="1145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1145

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<pre style="margin: 0;"> <span id="LC1145" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- additional refinement of the possible values x could take) indicate a</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1150" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1150

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<td class="diff-line-num new_line" data-linenumber="1146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1146

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<pre style="margin: 0;"> <span id="LC1146" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- contradiction</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1160" style="width: 35px; color: rgba(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="1156" style="width: 35px; color: rgba(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">@@ -1160,11 +1156,8 @@ addConCt delta@MkDelta{ delta_tm_st = TmSt env reps } x alt tvs args = do</td>

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<td class="diff-line-num old_line" data-linenumber="1160" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1160

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<td class="diff-line-num new_line" data-linenumber="1156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1156

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<pre style="margin: 0;"> <span id="LC1156" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">tm_cts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWithEqual</span> <span class="s" style="color: #d14;">"addConCt"</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarCt</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">other_args</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1161

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<td class="diff-line-num new_line" data-linenumber="1157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1157

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<pre style="margin: 0;"> <span id="LC1157" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">addPmCts</span> <span class="n" style="color: #333;">delta</span> <span class="p">(</span><span class="n" style="color: #333;">listToBag</span> <span class="n" style="color: #333;">ty_cts</span> <span class="p">`</span><span class="n" style="color: #333;">unionBags</span><span class="p">`</span> <span class="n" style="color: #333;">listToBag</span> <span class="n" style="color: #333;">tm_cts</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1162

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<td class="diff-line-num new_line" data-linenumber="1158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1158

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<pre style="margin: 0;"> <span id="LC1158" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1163" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1163

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<td class="diff-line-num new_line old" data-linenumber="1159" style="width: 35px; color: rgba(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="LC1163" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- Filter out redundant negative facts (those that compare Just False to</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1164" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1164

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<td class="diff-line-num new_line old" data-linenumber="1159" style="width: 35px; color: rgba(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="LC1164" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- the new solution)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1165" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1165

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<td class="diff-line-num new_line old" data-linenumber="1159" style="width: 35px; color: rgba(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="LC1165" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">neg'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filter</span> <span class="p">((</span><span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">PossiblyOverlap</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">eqPmAltCon</span> <span class="n" style="color: #333;">alt</span><span class="p">)</span> <span class="n" style="color: #333;">neg</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1166" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1166

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<td class="diff-line-num new_line" data-linenumber="1159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1159

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<pre style="margin: 0;"> <span id="LC1159" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">pos'</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">alt</span><span class="p">,</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">)</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">pos</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1167" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1167

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<td class="diff-line-num new_line old" data-linenumber="1160" style="width: 35px; color: rgba(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="LC1167" class="line" lang="haskell">      <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">delta</span><span class="p">{</span> <span class="n" style="color: #333;">delta_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="p">(</span><span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">pos'</span> <span class="n" style="color: #333;">neg<span class="idiff left right">'</span></span> <span class="n" style="color: #333;">cache</span><span class="p">))</span> <span class="n" style="color: #333;">reps</span><span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1168" style="width: 35px; color: rgba(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="1160" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1160

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<pre style="margin: 0;">+<span id="LC1160" class="line" lang="haskell">      <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">delta</span><span class="p">{</span> <span class="n" style="color: #333;">delta_tm_st</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmSt</span> <span class="p">(</span><span class="n" style="color: #333;">setEntrySDIE</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">VI</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">pos'</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">cache</span><span class="p">))</span> <span class="n" style="color: #333;">reps</span><span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1168" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1168

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<td class="diff-line-num new_line" data-linenumber="1161" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1161

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<pre style="margin: 0;"> <span id="LC1161" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1169" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1169

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<td class="diff-line-num new_line" data-linenumber="1162" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1162

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<pre style="margin: 0;"> <span id="LC1162" class="line" lang="haskell"><span class="n" style="color: #333;">equateTys</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmCt</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1170

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<td class="diff-line-num new_line" data-linenumber="1163" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1163

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<pre style="margin: 0;"> <span id="LC1163" class="line" lang="haskell"><span class="n" style="color: #333;">equateTys</span> <span class="n" style="color: #333;">ts</span> <span class="n" style="color: #333;">us</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1546" style="width: 35px; color: rgba(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">@@ -1553,7 +1546,7 @@ provideEvidence = go</td>

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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

</td>

<td class="diff-line-num new_line" data-linenumber="1546" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1546

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<pre style="margin: 0;"> <span id="LC1546" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">[]</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="1547" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1547

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<pre style="margin: 0;"> <span id="LC1547" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- When there are literals involved, just print negative info</span></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

</td>

<td class="diff-line-num new_line" data-linenumber="1548" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1548

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<pre style="margin: 0;"> <span id="LC1548" class="line" lang="haskell">          <span class="c1" style="color: #998; font-style: italic;">-- instead of listing missed constructors</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1556" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1556

</td>

<td class="diff-line-num new_line old" 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">

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<pre style="margin: 0;">-<span id="LC1556" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">notNull</span> <span class="p">[</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">neg</span> <span class="p">]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1557" style="width: 35px; color: rgba(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="1549" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1549

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<pre style="margin: 0;">+<span id="LC1549" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">notNull</span> <span class="p">[</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">pmAltConSetElems</span></span><span class="idiff right"> </span><span class="n" style="color: #333;">neg</span> <span class="p">]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1557" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1557

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<td class="diff-line-num new_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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<pre style="margin: 0;"> <span id="LC1550" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">xs</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">delta</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1558" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1558

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<td class="diff-line-num new_line" data-linenumber="1551" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1551

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<pre style="margin: 0;"> <span id="LC1551" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">try_instantiate</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">xs</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">delta</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1559" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1559

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<td class="diff-line-num new_line" data-linenumber="1552" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1552

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<pre style="margin: 0;"> <span id="LC1552" class="line" lang="haskell"></span>

</pre>

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<br>

</li>

<li id="a90b29966ba2a86c0f6927651648cb062f00ea03">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/677442333b9cce270a05f70e29dcd5df36f26d2b...336767f94b296377c59e73e8183e0d4934791485#a90b29966ba2a86c0f6927651648cb062f00ea03"><strong>compiler/GHC/HsToCore/PmCheck/Types.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="24" style="width: 35px; color: rgba(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="24" style="width: 35px; color: rgba(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">@@ -24,6 +24,10 @@ module GHC.HsToCore.PmCheck.Types (</td>

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<td class="diff-line-num old_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

24

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<td class="diff-line-num new_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

24

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Caching partially matched COMPLETE sets</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="25" style="width: 35px; color: rgba(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="LC25" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">ConLikeSet</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PossibleMatches</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>

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<td class="diff-line-num new old_line" data-linenumber="27" style="width: 35px; color: rgba(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="LC27" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * PmAltConSet</span></span>

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<td class="diff-line-num new old_line" data-linenumber="27" style="width: 35px; color: rgba(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="28" style="width: 35px; color: rgba(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="LC28" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">emptyPmAltConSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isEmptyPmAltConSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">elemPmAltConSet</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="27" style="width: 35px; color: rgba(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="LC29" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">extendPmAltConSet</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pmAltConSetElems</span><span class="p">,</span></span>

</pre>

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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>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * A 'DIdEnv' where entries may be shared</span></span>

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<td class="diff-line-num old_line" data-linenumber="28" style="width: 35px; color: rgba(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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<td class="diff-line-num new_line" data-linenumber="32" style="width: 35px; color: rgba(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="LC32" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">Shared</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">SharedDIdEnv</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">emptySDIE</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupSDIE</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">sameRepresentativeSDIE</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="29" style="width: 35px; color: rgba(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="LC33" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">setIndirectSDIE</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">setEntrySDIE</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">traverseSDIE</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="49" style="width: 35px; color: rgba(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="53" style="width: 35px; color: rgba(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">@@ -49,6 +53,7 @@ import Name</td>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.DataCon</span></span>

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.ConLike</span></span>

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>

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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ListSetOps</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unionLists</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>

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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="152" style="width: 35px; color: rgba(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="157" style="width: 35px; color: rgba(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">@@ -152,6 +157,33 @@ eqConLike _                 _                 = PossiblyOverlap</td>

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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span>     <span class="kt" style="color: #458; font-weight: 600;">PmLit</span></span>

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">ConLikeSet</span> <span class="o" style="font-weight: 600;">!</span><span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC162" class="line" lang="haskell"><span class="n" style="color: #333;">emptyPmAltConSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="haskell"><span class="n" style="color: #333;">emptyPmAltConSet</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">emptyUniqDSet</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell"><span class="n" style="color: #333;">isEmptyPmAltConSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC166" class="line" lang="haskell"><span class="n" style="color: #333;">isEmptyPmAltConSet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isEmptyUniqDSet</span> <span class="n" style="color: #333;">cls</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">lits</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC168" class="line" lang="haskell"><span class="cd">-- | Whether there is a 'PmAltCon' in the 'PmAltConSet' that compares 'Equal' to</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the given 'PmAltCon' according to 'eqPmAltCon'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell"><span class="n" style="color: #333;">elemPmAltConSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC171" class="line" lang="haskell"><span class="n" style="color: #333;">elemPmAltConSet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</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;">elementOfUniqDSet</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">cls</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell"><span class="n" style="color: #333;">elemPmAltConSet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="kr" style="font-weight: 600;">_</span>   <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">elem</span> <span class="n" style="color: #333;">lit</span> <span class="n" style="color: #333;">lits</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">extendPmAltConSet</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell"><span class="n" style="color: #333;">extendPmAltConSet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC176" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="p">(</span><span class="n" style="color: #333;">addOneToUniqDSet</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">cl</span><span class="p">)</span> <span class="n" style="color: #333;">lits</span></span>

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell"><span class="n" style="color: #333;">extendPmAltConSet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</span> <span class="p">(</span><span class="n" style="color: #333;">unionLists</span> <span class="n" style="color: #333;">lits</span> <span class="p">[</span><span class="n" style="color: #333;">lit</span><span class="p">])</span></span>

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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC180" class="line" lang="haskell"><span class="n" style="color: #333;">pmAltConSetElems</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell"><span class="n" style="color: #333;">pmAltConSetElems</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PACS</span> <span class="n" style="color: #333;">cls</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="p">(</span><span class="n" style="color: #333;">uniqDSetToList</span> <span class="n" style="color: #333;">cls</span><span class="p">)</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">lits</span></span>

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConSet</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">pmAltConSetElems</span></span>

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<pre style="margin: 0;">+<span id="LC186" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"><span class="cd">-- | We can't in general decide whether two 'PmAltCon's match the same set of</span></span>

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- values. In addition to the reasons in 'eqPmLit' and 'eqConLike', a</span></span>

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<pre style="margin: 0;"> <span id="LC189" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'PmAltConLike' might or might not represent the same value as a 'PmAltLit'.</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">@@ -475,7 +507,7 @@ data VarInfo</td>

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<pre style="margin: 0;"> <span id="LC507" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- However, no more than one RealDataCon in the list, otherwise contradiction</span></span>

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<pre style="margin: 0;"> <span id="LC508" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- because of generativity.</span></span>

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477

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<pre style="margin: 0;"> <span id="LC509" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC478" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">vi_neg</span> <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="p"><span class="idiff left">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmAltCon</span></span><span class="p"><span class="idiff right">]</span></span></span>

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510

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<pre style="margin: 0;">+<span id="LC510" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">vi_neg</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;"><span class="idiff left right">PmAltConSet</span></span></span>

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479

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511

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<pre style="margin: 0;"> <span id="LC511" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- ^ Negative info: A list of 'PmAltCon's that it cannot match.</span></span>

</pre>

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480

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512

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<pre style="margin: 0;"> <span id="LC512" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Example, assuming</span></span>

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481

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513

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<pre style="margin: 0;"> <span id="LC513" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">--</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">@@ -489,6 +521,9 @@ data VarInfo</td>

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<pre style="margin: 0;"> <span id="LC521" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- between 'vi_pos' and 'vi_neg'.</span></span>

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490

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522

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<pre style="margin: 0;"> <span id="LC522" class="line" lang="haskell"></span>

</pre>

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491

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<pre style="margin: 0;"> <span id="LC523" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Why record both positive and negative info?]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC524" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- It's worth having an actual set rather than a simple association list,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC525" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- because files like Cabal's `LicenseId` define relatively huge enums</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC526" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- that lead to quadratic or worse behavior.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC527" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC528" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">vi_cache</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;">PossibleMatches</span></span>

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494

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<pre style="margin: 0;"> <span id="LC529" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- ^ A cache of the associated COMPLETE sets. At any time a superset of</span></span>

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<br>

</li>

<li id="f1fb2cbc6312f41f6aac14d2046c24ce0c5cbea2">

<a href="https://gitlab.haskell.org/ghc/ghc/compare/677442333b9cce270a05f70e29dcd5df36f26d2b...336767f94b296377c59e73e8183e0d4934791485#f1fb2cbc6312f41f6aac14d2046c24ce0c5cbea2"><strong>docs/users_guide/exts/ffi.rst</strong></a>

<hr>

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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">@@ -37,31 +37,51 @@ Guaranteed call safety</td>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="plaintext">~~~~~~~~~~~~~~~~~~~~~~</span>

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<pre style="margin: 0;"> <span id="LC38" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="plaintext">The Haskell 2010 Report specifies that ``safe`` FFI calls must allow foreign</span>

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<pre style="margin: 0;">-<span id="LC40" class="line" lang="plaintext">calls to safely call into Haskell code. In practice, this means that <span class="idiff left right">the</span></span>

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<pre style="margin: 0;">-<span id="LC41" class="line" lang="plaintext"><span class="idiff left right">garbage collector must be able to run while these calls are in progress,</span></span>

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<pre style="margin: 0;">-<span id="LC42" class="line" lang="plaintext"><span class="idiff left right">moving heap-allocated Haskell values around arbitrarily</span>.</span>

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<pre style="margin: 0;">+<span id="LC40" class="line" lang="plaintext">calls to safely call into Haskell code. In practice, this means that <span class="idiff left right">called</span></span>

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<pre style="margin: 0;">+<span id="LC41" class="line" lang="plaintext"><span class="idiff left right">functions also have to assume heap-allocated Haskell values may move around</span></span>

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<pre style="margin: 0;">+<span id="LC42" class="line" lang="plaintext"><span class="idiff left right">arbitrarily in order to allow for GC</span>.</span>

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<pre style="margin: 0;"> <span id="LC43" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC44" class="line" lang="plaintext">This greatly constrains library authors since it implies that it is not safe to</span>

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<pre style="margin: 0;"> <span id="LC45" class="line" lang="plaintext">pass any heap object reference to a ``safe`` foreign function call.  For</span>

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<pre style="margin: 0;">-<span id="LC46" class="line" lang="plaintext">instance, it is often desirable to pass <span class="idiff left right">an </span>:ref:`unpinned <pinned-byte-arrays>`</span>

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<pre style="margin: 0;">+<span id="LC46" class="line" lang="plaintext">instance, it is often desirable to pass :ref:`unpinned <pinned-byte-arrays>`</span>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="plaintext">``ByteArray#``\s directly to native code to avoid making an otherwise-unnecessary</span>

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<pre style="margin: 0;">-<span id="LC48" class="line" lang="plaintext">copy. However, this can <span class="idiff left right">only be done safely if the array is guaranteed not to be</span></span>

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<pre style="margin: 0;">-<span id="LC49" class="line" lang="plaintext">moved by the garbage collector in the middle of the call.</span>

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<pre style="margin: 0;">+<span id="LC48" class="line" lang="plaintext">copy. However, this can <span class="idiff left right">not be done safely for ``safe`` calls since the array might</span></span>

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<pre style="margin: 0;">+<span id="LC49" class="line" lang="plaintext"><span class="idiff left right">be </span>moved by the garbage collector in the middle of the call.</span>

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<pre style="margin: 0;"> <span id="LC50" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC51" class="line" lang="plaintext">The Chapter <span class="idiff left right">does *not* require implementations to refrain from doing the</span></span>

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<pre style="margin: 0;">-<span id="LC52" class="line" lang="plaintext"><span class="idiff left right">same for ``unsafe`` calls, s</span>o strictly Haskell 2010-conforming programs</span>

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<pre style="margin: 0;">+<span id="LC51" class="line" lang="plaintext">The Chapter <span class="idiff left right">*does* allow for implementations to move objects around during</span></span>

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<pre style="margin: 0;">+<span id="LC52" class="line" lang="plaintext"><span class="idiff left right">``unsafe`` calls as well. S</span>o strictly Haskell 2010-conforming programs</span>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="plaintext">cannot pass heap-allocated references to ``unsafe`` FFI calls either.</span>

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC55" class="line" lang="plaintext">GHC, since version 8.4, **guarantees** that garbage collection will never occur</span>

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<pre style="margin: 0;">+<span id="LC56" class="line" lang="plaintext">during an ``unsafe`` call, even in the bytecode interpreter, and further guarantees</span>

</pre>

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<pre style="margin: 0;">+<span id="LC57" class="line" lang="plaintext">that ``unsafe`` calls will be performed in the calling thread. Making it safe to</span>

</pre>

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<pre style="margin: 0;">+<span id="LC58" class="line" lang="plaintext">pass heap-allocated objects to unsafe functions.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC59" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="plaintext">In previous releases, GHC would take advantage of the freedom afforded by the</span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="plaintext">Chapter by performing ``safe`` foreign calls in place of ``unsafe`` calls in</span>

</pre>

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<pre style="margin: 0;"> <span id="LC62" class="line" lang="plaintext">the bytecode interpreter. This meant that some packages which worked when</span>

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<pre style="margin: 0;">-<span id="LC58" class="line" lang="plaintext">compiled would fail under GHCi (e.g. :ghc-ticket:`13730`).</span>

</pre>

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<pre style="margin: 0;">+<span id="LC63" class="line" lang="plaintext">compiled would fail under GHCi (e.g. :ghc-ticket:`13730`). But this is no</span>

</pre>

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<pre style="margin: 0;">+<span id="LC64" class="line" lang="plaintext">longer the case in recent releases.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC65" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="66" style="width: 35px; color: rgba(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="LC66" class="line" lang="plaintext">Interactions between ``safe`` calls and bound threads</span>

</pre>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="plaintext">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span>

</pre>

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<pre style="margin: 0;">+<span id="LC68" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="69" style="width: 35px; color: rgba(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="LC69" class="line" lang="plaintext">A ``safe`` call calling into haskell is run on a bound thread by</span>

</pre>

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<pre style="margin: 0;">+<span id="LC70" class="line" lang="plaintext">the RTS. This means any nesting of ``safe`` calls will be executed on</span>

</pre>

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<pre style="margin: 0;">+<span id="LC71" class="line" lang="plaintext">the same operating system thread. *Sequential* ``safe`` calls however</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="72" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

72

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<pre style="margin: 0;">+<span id="LC72" class="line" lang="plaintext">do not enjoy this luxury and may be run on arbitrary OS threads.</span>

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59

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73

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<pre style="margin: 0;"> <span id="LC73" class="line" lang="plaintext"></span>

</pre>

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60

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<td class="diff-line-num new_line old" data-linenumber="74" style="width: 35px; color: rgba(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="LC60" class="line" lang="plaintext">However, since version 8.4 this is no longer the case: GHC **guarantees** that</span>

</pre>

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61

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<pre style="margin: 0;">-<span id="LC61" class="line" lang="plaintext">garbage collection will never occur during an ``unsafe`` call, even in the</span>

</pre>

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62

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<pre style="margin: 0;">-<span id="LC62" class="line" lang="plaintext">bytecode interpreter, and further guarantees that ``unsafe`` calls will be</span>

</pre>

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63

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<td class="diff-line-num new_line old" data-linenumber="74" style="width: 35px; color: rgba(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="LC63" class="line" lang="plaintext">performed in the calling thread.</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

74

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<pre style="margin: 0;">+<span id="LC74" class="line" lang="plaintext">This behaviour is considered an implementation detail and code relying on</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="64" style="width: 35px; color: rgba(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="75" style="width: 35px; color: rgba(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="LC75" class="line" lang="plaintext">thread local state should instead use one of the interfaces provided</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="76" style="width: 35px; color: rgba(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="LC76" class="line" lang="plaintext">in :base-ref:`Control.Concurrent.` to make this explicit.</span>

</pre>

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64

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="65" style="width: 35px; color: rgba(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="78" style="width: 35px; color: rgba(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="LC78" class="line" lang="plaintext">For information on what bound threads are,</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="65" style="width: 35px; color: rgba(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="79" style="width: 35px; color: rgba(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="LC79" class="line" lang="plaintext">see the documentation for the :base-ref:`Control.Concurrent.`.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC80" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="81" style="width: 35px; color: rgba(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="LC81" class="line" lang="plaintext">For more details on the implementation see the Paper:</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="82" style="width: 35px; color: rgba(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="LC82" class="line" lang="plaintext">"Extending the Haskell Foreign Function Interface with Concurrency".</span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="83" style="width: 35px; color: rgba(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="LC83" class="line" lang="plaintext">Last known to be accessible `here</span>

</pre>

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<pre style="margin: 0;">+<span id="LC84" class="line" lang="plaintext"><https://www.microsoft.com/en-us/research/wp-content/uploads/2004/09/conc-ffi.pdf>`_.</span>

</pre>

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<pre style="margin: 0;"> <span id="LC85" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC86" class="line" lang="plaintext">.. _ffi-ghcexts:</span>

</pre>

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<pre style="margin: 0;"> <span id="LC87" class="line" lang="plaintext"></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">@@ -100,7 +120,7 @@ restrictions:</td>

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<pre style="margin: 0;"> <span id="LC120" class="line" lang="plaintext">  of heap objects record writes for the purpose of garbage collection.</span>

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<td class="diff-line-num old_line" data-linenumber="101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

101

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<td class="diff-line-num new_line" data-linenumber="121" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

121

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<pre style="margin: 0;"> <span id="LC121" class="line" lang="plaintext">  An array of heap objects is passed to a foreign C function, the</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

102

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<td class="diff-line-num new_line" data-linenumber="122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

122

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="plaintext">  runtime does not record any writes. Consequently, it is not safe to</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

103

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<td class="diff-line-num new_line old" data-linenumber="123" style="width: 35px; color: rgba(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="LC103" class="line" lang="plaintext">  write to an array of heap objects in a foreign function.<span class="idiff left right"> </span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="104" style="width: 35px; color: rgba(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="123" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

123

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<pre style="margin: 0;">+<span id="LC123" class="line" lang="plaintext">  write to an array of heap objects in a foreign function.</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

104

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<td class="diff-line-num new_line" data-linenumber="124" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

124

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<pre style="margin: 0;"> <span id="LC124" class="line" lang="plaintext">  Since the runtime has no facilities for tracking mutation of a</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

105

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<td class="diff-line-num new_line" data-linenumber="125" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

125

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<pre style="margin: 0;"> <span id="LC125" class="line" lang="plaintext">  ``MutableByteArray#``, these can be safely mutated in any foreign</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

106

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<td class="diff-line-num new_line" data-linenumber="126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

126

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<pre style="margin: 0;"> <span id="LC126" class="line" lang="plaintext">  function.</span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="169" style="width: 35px; color: rgba(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="189" style="width: 35px; color: rgba(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">@@ -169,7 +189,7 @@ In other situations, the C function may need knowledge of the RTS</td>

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169

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189

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<pre style="margin: 0;"> <span id="LC189" class="line" lang="plaintext">closure types. The following example sums the first element of</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

170

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190

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<pre style="margin: 0;"> <span id="LC190" class="line" lang="plaintext">each ``ByteArray#`` (interpreting the bytes as an array of ``CInt``)</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="171" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

171

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<td class="diff-line-num new_line" data-linenumber="191" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

191

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<pre style="margin: 0;"> <span id="LC191" class="line" lang="plaintext">element of an ``ArrayArray##`` [3]_::</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="172" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

172

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<td class="diff-line-num new_line old" data-linenumber="192" style="width: 35px; color: rgba(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="LC172" class="line" lang="plaintext"><span class="idiff left right">    </span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="173" style="width: 35px; color: rgba(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="192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

192

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<pre style="margin: 0;">+<span id="LC192" class="line" lang="plaintext"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="173" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

173

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<td class="diff-line-num new_line" data-linenumber="193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

193

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<pre style="margin: 0;"> <span id="LC193" class="line" lang="plaintext">    // C source, must include the RTS to make the struct StgArrBytes</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="174" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

174

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<td class="diff-line-num new_line" data-linenumber="194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

194

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<pre style="margin: 0;"> <span id="LC194" class="line" lang="plaintext">    // available along with its fields: ptrs and payload.</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="175" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

175

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<td class="diff-line-num new_line" data-linenumber="195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

195

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<pre style="margin: 0;"> <span id="LC195" class="line" lang="plaintext">    #include "Rts.h"</span>

</pre>

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