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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd">0e83efa2</a></strong>
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<span>by Krzysztof Gogolewski</span>
<i>at 2020-06-27T11:57:49-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Don't generalize when typechecking a tuple section
The code is simpler and cleaner.
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<h4>6 changed files:</h4>
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<li class="file-stats">
<a href="#8a5cd068459120cddf3814e7b9e02003b87647ba">
compiler/GHC/Builtin/Types/Prim.hs
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<li class="file-stats">
<a href="#cc97d81e7223ad4a3a5e801156ca632f9fa75654">
compiler/GHC/Hs/Expr.hs
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<li class="file-stats">
<a href="#6bdd5abc649727f2a802bc96ce5c276de19d3726">
compiler/GHC/HsToCore/Expr.hs
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<li class="file-stats">
<a href="#085703923f9c18f6ac9f926ac9a4c7c7e6d9d9ed">
compiler/GHC/HsToCore/Match.hs
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<li class="file-stats">
<a href="#902811828741e6bcd64702935bbb54edbbd070ef">
compiler/GHC/Tc/Gen/Expr.hs
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<li class="file-stats">
<a href="#6a120b0673f8920127d8fffdaa16f01b90cc92d7">
compiler/GHC/Tc/Utils/Zonk.hs
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<h4>Changes:</h4>
<li id="8a5cd068459120cddf3814e7b9e02003b87647ba">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#8a5cd068459120cddf3814e7b9e02003b87647ba"><strong>compiler/GHC/Builtin/Types/Prim.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -27,7 +27,6 @@ module GHC.Builtin.Types.Prim(</td>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"> <span class="n" style="color: #333;">openAlphaTy</span><span class="p">,</span> <span class="n" style="color: #333;">openBetaTy</span><span class="p">,</span> <span class="n" style="color: #333;">openAlphaTyVar</span><span class="p">,</span> <span class="n" style="color: #333;">openBetaTyVar</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"> <span class="n" style="color: #333;">multiplicityTyVar</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC30" class="line" lang="haskell"> <span class="n" style="color: #333;">multiplicityTyVarList</span><span class="p">,</span></span>
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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;">-- Kind constructors...</span></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="n" style="color: #333;">tYPETyCon</span><span class="p">,</span> <span class="n" style="color: #333;">tYPETyConName</span><span class="p">,</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="392" style="width: 35px; color: rgba(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="391" style="width: 35px; color: rgba(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">@@ -392,11 +391,6 @@ openBetaTy = mkTyVarTy openBetaTyVar</td>
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<pre style="margin: 0;"> <span id="LC391" class="line" lang="haskell"><span class="n" style="color: #333;">multiplicityTyVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyVar</span></span>
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<pre style="margin: 0;"> <span id="LC392" class="line" lang="haskell"><span class="n" style="color: #333;">multiplicityTyVar</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTemplateTyVars</span> <span class="p">(</span><span class="n" style="color: #333;">repeat</span> <span class="n" style="color: #333;">multiplicityTy</span><span class="p">)</span> <span class="o" style="font-weight: 600;">!!</span> <span class="mi" style="color: #099;">13</span> <span class="c1" style="color: #998; font-style: italic;">-- selects 'n'</span></span>
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<pre style="margin: 0;"> <span id="LC393" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC395" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Create 'count' multiplicity TyVars</span></span>
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<pre style="margin: 0;">-<span id="LC396" class="line" lang="haskell"><span class="n" style="color: #333;">multiplicityTyVarList</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TyVar</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC397" class="line" lang="haskell"><span class="n" style="color: #333;">multiplicityTyVarList</span> <span class="n" style="color: #333;">count</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">take</span> <span class="n" style="color: #333;">count</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC398" class="line" lang="haskell"> <span class="n" style="color: #333;">drop</span> <span class="mi" style="color: #099;">13</span> <span class="o" style="font-weight: 600;">$</span> <span class="c1" style="color: #998; font-style: italic;">-- selects 'n', 'o'...</span></span>
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<pre style="margin: 0;">-<span id="LC399" class="line" lang="haskell"> <span class="n" style="color: #333;">mkTemplateTyVars</span> <span class="p">(</span><span class="n" style="color: #333;">repeat</span> <span class="n" style="color: #333;">multiplicityTy</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC394" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<pre style="margin: 0;"> <span id="LC395" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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<pre style="margin: 0;"> <span id="LC396" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#cc97d81e7223ad4a3a5e801156ca632f9fa75654"><strong>compiler/GHC/Hs/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -740,7 +740,7 @@ type instance XPresent (GhcPass _) = NoExtField</td>
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<pre style="margin: 0;"> <span id="LC740" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC741" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XMissing</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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<pre style="margin: 0;"> <span id="LC742" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XMissing</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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<pre style="margin: 0;">-<span id="LC743" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XMissing</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;">+<span id="LC743" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XMissing</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Scaled</span></span><span class="idiff right"> </span><span class="kt" style="color: #458; font-weight: 600;">Type</span></span>
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<pre style="margin: 0;"> <span id="LC744" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC745" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XXTupArg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</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;">NoExtCon</span></span>
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<pre style="margin: 0;"> <span id="LC746" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#6bdd5abc649727f2a802bc96ce5c276de19d3726"><strong>compiler/GHC/HsToCore/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -64,7 +64,6 @@ import GHC.Types.Basic</td>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Maybe</span></span>
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<pre style="margin: 0;"> <span id="LC65" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Env</span></span>
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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</span></span>
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<pre style="margin: 0;">-<span id="LC67" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types.Prim</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkTemplateTyVars</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC67" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span></span>
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<pre style="margin: 0;"> <span id="LC68" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Data.Bag</span></span>
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<pre style="margin: 0;"> <span id="LC69" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Outputable</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">Outputable</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">@@ -427,26 +426,22 @@ dsExpr e@(SectionR _ op expr) = do</td>
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<pre style="margin: 0;"> <span id="LC426" class="line" lang="haskell"> <span class="n" style="color: #333;">core_op</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">x_id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">y_id</span><span class="p">]))</span></span>
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<pre style="margin: 0;"> <span id="LC427" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC428" class="line" lang="haskell"><span class="n" style="color: #333;">dsExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ExplicitTuple</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">tup_args</span> <span class="n" style="color: #333;">boxity</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC430" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">usedmults</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mult</span></span><span class="o" style="font-weight: 600;"><span class="idiff">:</span></span><span class="n" style="color: #333;"><span class="idiff">mults</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Missing</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">ty</span></span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC429" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p"><span class="idiff left">)</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Missing</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Scaled</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mult</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</span></span><span class="p"><span class="idiff right">)</span>))</span></span>
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<pre style="margin: 0;"> <span id="LC430" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For every missing expression, we need</span></span>
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<pre style="margin: 0;">-<span id="LC432" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- another lambda in the desugaring. This lambda is linear</span></span>
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<pre style="margin: 0;">-<span id="LC433" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- since tuples are linear</span></span>
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<pre style="margin: 0;">-<span id="LC434" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newSysLocalDsNoLP</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTy</span> <span class="n" style="color: #333;">mult</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">-<span id="LC435" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">mult</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">usedmults</span><span class="p">,</span> <span class="n" style="color: #333;">mults</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC436" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">missing</span><span class="p">,</span> <span class="n" style="color: #333;">mults</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">expr</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC431" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- another lambda in the desugaring.</span></span>
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<pre style="margin: 0;">+<span id="LC432" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newSysLocalDsNoLP</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">ty</span></span>
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<pre style="margin: 0;">+<span id="LC433" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">lam_var</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC434" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">expr</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC435" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Expressions that are present don't generate</span></span>
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<pre style="margin: 0;"> <span id="LC436" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- lambdas, just arguments.</span></span>
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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">core_expr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsLExprNoLP</span> <span class="n" style="color: #333;">expr</span></span>
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<pre style="margin: 0;">-<span id="LC440" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">core_expr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">missing</span><span class="p">,</span> <span class="n" style="color: #333;">mults</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC441" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">missing</span><span class="p">,</span> <span class="n" style="color: #333;">mults</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"dsExpr"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lam_vars</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">missing</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mults</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC438" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">core_expr</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC439" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC443" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">multiplicityVars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTemplateTyVars</span> <span class="p">(</span><span class="n" style="color: #333;">repeat</span> <span class="n" style="color: #333;">multiplicityTy</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC444" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">dsWhenNoErrs</span> <span class="p">(</span><span class="n" style="color: #333;">foldM</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">multiplicityVars</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">tup_args</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC440" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">dsWhenNoErrs</span> <span class="p">(</span><span class="n" style="color: #333;">foldM</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">reverse</span> <span class="n" style="color: #333;">tup_args</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC441" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The reverse is because foldM goes left-to-right</span></span>
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<pre style="margin: 0;">-<span id="LC446" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">usedmults</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>
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<pre style="margin: 0;">-<span id="LC447" class="line" lang="haskell"> <span class="n" style="color: #333;">mkCoreLams</span> <span class="n" style="color: #333;">usedmults</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC442" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">lam_vars</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"> <span class="n" style="color: #333;">mkCoreLams</span> <span class="n" style="color: #333;">lam_vars</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC449" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="n" style="color: #333;">mkCoreTupBoxity</span> <span class="n" style="color: #333;">boxity</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC444" class="line" lang="haskell"> <span class="n" style="color: #333;">mkCoreTupBoxity</span> <span class="n" style="color: #333;">boxity</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Don't flatten tuples from HsSyn] in GHC.Core.Make</span></span>
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<pre style="margin: 0;"> <span id="LC446" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"><span class="n" style="color: #333;">dsExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ExplicitSum</span> <span class="n" style="color: #333;">types</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">arity</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#085703923f9c18f6ac9f926ac9a4c7c7e6d9d9ed"><strong>compiler/GHC/HsToCore/Match.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1109,7 +1109,7 @@ viewLExprEq (e1,_) (e2,_) = lexp e1 e2</td>
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<pre style="margin: 0;"> <span id="LC1109" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1110" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">---------</span></span>
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<pre style="margin: 0;"> <span id="LC1111" class="line" lang="haskell"> <span class="n" style="color: #333;">tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">e1</span><span class="p">))</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">e2</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lexp</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span></span>
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<pre style="margin: 0;">-<span id="LC1112" class="line" lang="haskell"> <span class="n" style="color: #333;">tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="n" style="color: #333;"><span class="idiff left">t1</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Missing</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">t2</span></span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqType</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span></span>
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<pre style="margin: 0;">+<span id="LC1112" class="line" lang="haskell"> <span class="n" style="color: #333;">tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Scaled</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">t1</span></span><span class="p"><span class="idiff">)))</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Missing</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Scaled</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">t2</span></span><span class="p"><span class="idiff right">)</span>))</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqType</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span></span>
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<pre style="margin: 0;"> <span id="LC1113" class="line" lang="haskell"> <span class="n" style="color: #333;">tup_arg</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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1114
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<pre style="margin: 0;"> <span id="LC1114" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1115" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">---------</span></span>
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<li id="902811828741e6bcd64702935bbb54edbbd070ef">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#902811828741e6bcd64702935bbb54edbbd070ef"><strong>compiler/GHC/Tc/Gen/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -71,7 +71,6 @@ import GHC.Core.Type</td>
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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Types.Evidence</span></span>
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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Var.Set</span></span>
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<pre style="margin: 0;"> <span id="LC73" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types</span></span>
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<pre style="margin: 0;">-<span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types.Prim</span><span class="p">(</span> <span class="n" style="color: #333;">multiplicityTyVarList</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.PrimOps</span><span class="p">(</span> <span class="n" style="color: #333;">tagToEnumKey</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Names</span></span>
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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Session</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">@@ -500,22 +499,17 @@ tcExpr expr@(ExplicitTuple x tup_args boxity) res_ty</td>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Handle tuple sections where</span></span>
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<pre style="margin: 0;"> <span id="LC500" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tup_args1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcTupArgs</span> <span class="n" style="color: #333;">tup_args</span> <span class="n" style="color: #333;">arg_tys</span></span>
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<pre style="margin: 0;"> <span id="LC501" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC503" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ExplicitTuple</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tup_args1</span> <span class="n" style="color: #333;">boxity</span></span>
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<pre style="margin: 0;">+<span id="LC502" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ExplicitTuple</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">tup_args1</span> <span class="n" style="color: #333;">boxity</span></span>
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<pre style="margin: 0;">+<span id="LC503" class="line" lang="haskell"> <span class="n" style="color: #333;">missing_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="n" style="color: #333;">mult</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)),</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zip</span> <span class="n" style="color: #333;">tup_args1</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC505" class="line" lang="haskell"> <span class="n" style="color: #333;">missing_tys</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</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;">zip</span> <span class="n" style="color: #333;">arg_tys</span> <span class="n" style="color: #333;">tup_args</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC506" class="line" lang="haskell"> <span class="n" style="color: #333;">w_tyvars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">multiplicityTyVarList</span> <span class="p">(</span><span class="n" style="color: #333;">length</span> <span class="n" style="color: #333;">missing_tys</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC507" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Linear fields generalization]</span></span>
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<pre style="margin: 0;">-<span id="LC508" class="line" lang="haskell"> <span class="n" style="color: #333;">w_tvb</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarBinder</span> <span class="kt" style="color: #458; font-weight: 600;">Inferred</span><span class="p">)</span> <span class="n" style="color: #333;">w_tyvars</span></span>
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<pre style="margin: 0;">+<span id="LC505" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Linear fields generalization]</span></span>
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"> <span class="n" style="color: #333;">act_res_ty</span></span>
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<pre style="margin: 0;">-<span id="LC510" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkForAllTys</span> <span class="n" style="color: #333;">w_tvb</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">-<span id="LC511" class="line" lang="haskell"> <span class="n" style="color: #333;">mkVisFunTys</span> <span class="p">[</span> <span class="n" style="color: #333;">mkScaled</span> <span class="p">(</span><span class="n" style="color: #333;">mkTyVarTy</span> <span class="n" style="color: #333;">w_ty</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">|</span></span>
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<pre style="margin: 0;">-<span id="LC512" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">w_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zip</span> <span class="n" style="color: #333;">missing_tys</span> <span class="n" style="color: #333;">w_tyvars</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC513" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">mkTupleTy1</span> <span class="n" style="color: #333;">boxity</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC507" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVisFunTys</span> <span class="n" style="color: #333;">missing_tys</span> <span class="p">(</span><span class="n" style="color: #333;">mkTupleTy1</span> <span class="n" style="color: #333;">boxity</span> <span class="n" style="color: #333;">arg_tys</span><span class="p">)</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;">-- See Note [Don't flatten tuples from HsSyn] in GHC.Core.Make</span></span>
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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="LC510" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"ExplicitTuple"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">act_res_ty</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">res_ty</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC511" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC518" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcWrapResult</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">expr'</span> <span class="n" style="color: #333;">act_res_ty</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC512" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">tcWrapResult<span class="idiff left right">Mono</span></span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">expr'</span> <span class="n" style="color: #333;">act_res_ty</span> <span class="n" style="color: #333;">res_ty</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC513" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC514" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ExplicitSum</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">arity</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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521
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515
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<pre style="margin: 0;"> <span id="LC515" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">sum_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sumTyCon</span> <span class="n" style="color: #333;">arity</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">@@ -1557,7 +1551,8 @@ tcTupArgs :: [LHsTupArg GhcRn] -> [TcSigmaType] -> TcM [LHsTupArg GhcTc]</td>
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1557
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1551
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<pre style="margin: 0;"> <span id="LC1551" class="line" lang="haskell"><span class="n" style="color: #333;">tcTupArgs</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">tys</span></span>
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1558
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1552
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<pre style="margin: 0;"> <span id="LC1552" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span> <span class="n" style="color: #333;">equalLength</span> <span class="n" style="color: #333;">args</span> <span class="n" style="color: #333;">tys</span> <span class="p">)</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="n" style="color: #333;">args</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>
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1559
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1553
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<pre style="margin: 0;"> <span id="LC1553" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1560
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<pre style="margin: 0;">-<span id="LC1560" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="p">{}),</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">))</span></span>
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1554
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<pre style="margin: 0;">+<span id="LC1554" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="p">{}),</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">mult</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newFlexiTyVarTy</span> <span class="n" style="color: #333;">multiplicityTy</span></span>
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1555
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<pre style="margin: 0;">+<span id="LC1555" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Scaled</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)))</span> <span class="p">}</span></span>
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1556
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<pre style="margin: 0;"> <span id="LC1556" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">expr</span><span class="p">),</span> <span class="n" style="color: #333;">arg_ty</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">expr'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcCheckPolyExpr</span> <span class="n" style="color: #333;">expr</span> <span class="n" style="color: #333;">arg_ty</span></span>
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1562
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1557
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<pre style="margin: 0;"> <span id="LC1557" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">expr'</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC1558" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0e83efa24636c72811e4c79fe1c7e4f7cf3170cd#6a120b0673f8920127d8fffdaa16f01b90cc92d7"><strong>compiler/GHC/Tc/Utils/Zonk.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -811,7 +811,7 @@ zonkExpr env (ExplicitTuple x tup_args boxed)</td>
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811
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<pre style="margin: 0;"> <span id="LC811" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC812" class="line" lang="haskell"> <span class="n" style="color: #333;">zonk_tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">e'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkLExpr</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span></span>
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<pre style="margin: 0;"> <span id="LC813" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Present</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e'</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC814" class="line" lang="haskell"> <span class="n" style="color: #333;">zonk_tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="n" style="color: #333;">t</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">t'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonkTcTypeToTypeX</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">t</span></span>
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<pre style="margin: 0;">+<span id="LC814" class="line" lang="haskell"> <span class="n" style="color: #333;">zonk_tup_arg</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="n" style="color: #333;">t</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">t'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">zonk<span class="idiff left right">Scaled</span>TcTypeToTypeX</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">t</span></span>
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<pre style="margin: 0;"> <span id="LC815" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Missing</span> <span class="n" style="color: #333;">t'</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC816" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC817" class="line" lang="haskell"></span>
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