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<h3>
Matthías Páll Gissurarson pushed to branch wip/D5373
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/35eca34c669e01d0ca2c812b5186c0d2c7c36da0">35eca34c</a></strong>
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<span>by Matthías Páll Gissurarson</span>
<i>at 2019-05-23T10:59:16Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Move HoleFitPlugin definitions and instances to TcRnTypes
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<h4>2 changed files:</h4>
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<li class="file-stats">
<a href="#39f28d5dc8c176ea580515ffbadb8250289f1b7d">
compiler/typecheck/TcHoleErrors.hs
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<a href="#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">
compiler/typecheck/TcRnTypes.hs
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<h4>Changes:</h4>
<li id="39f28d5dc8c176ea580515ffbadb8250289f1b7d">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/35eca34c669e01d0ca2c812b5186c0d2c7c36da0#39f28d5dc8c176ea580515ffbadb8250289f1b7d"><strong>compiler/typecheck/TcHoleErrors.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">@@ -3,7 +3,10 @@</td>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">TcHoleErrors</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">findValidHoleFits</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcFilterHoleFits</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcCheckHoleFit</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tcSubsumes</span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">withoutUnification</span></span>
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<pre style="margin: 0;">-<span id="LC6" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">fromPurePlugin</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">fromPureHFPlugin</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Re-exports for convenience</span></span>
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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hfName</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hfIsLcl</span></span>
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<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"> <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprHoleFit</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">debugHoleFitDispConfig</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Re-exported from TcRnTypes</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TypedHole</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;">HoleFit</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;">HoleFitCandidate</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="43" style="width: 35px; color: rgba(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">@@ -40,7 +43,6 @@ import Control.Arrow ( (&&&) )</td>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">filterM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">replicateM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">foldM</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">partition</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">sort</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">sortOn</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nubBy</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Graph</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">graphFromEdges</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">topSort</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Function</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">on</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TcSimplify</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">simpl_top</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">runTcSDeriveds</span> <span class="p">)</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">@@ -428,7 +430,6 @@ getSortingAlg =</td>
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<pre style="margin: 0;"> <span id="LC430" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">BySize</span></span>
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<pre style="margin: 0;"> <span id="LC431" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="kt" style="color: #458; font-weight: 600;">NoSorting</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC432" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC431" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell"><span class="n" style="color: #333;">hfName</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>
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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"><span class="n" style="color: #333;">hfName</span> <span class="n" style="color: #333;">hf</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">hfCand</span> <span class="n" style="color: #333;">hf</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC435" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IdHFCand</span> <span class="n" style="color: #333;">id</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">id</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">@@ -443,27 +444,6 @@ hfIsLcl hf@(HoleFit {}) = case hfCand hf of</td>
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<pre style="margin: 0;"> <span id="LC444" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">GreHFCand</span> <span class="n" style="color: #333;">gre</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">gre_lcl</span> <span class="n" style="color: #333;">gre</span></span>
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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"><span class="n" style="color: #333;">hfIsLcl</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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<pre style="margin: 0;"> <span id="LC446" class="line" lang="haskell"></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="c1" style="color: #998; font-style: italic;">-- We define an Eq and Ord instance to be able to build a graph.</span></span>
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<pre style="margin: 0;">-<span id="LC448" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC449" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfId</span></span>
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<pre style="margin: 0;">-<span id="LC450" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC451" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We compare HoleFits by their name instead of their Id, since we don't</span></span>
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<pre style="margin: 0;">-<span id="LC452" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- want our tests to be affected by the non-determinism of `nonDetCmpVar`,</span></span>
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<pre style="margin: 0;">-<span id="LC453" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- which is used to compare Ids. When comparing, we want HoleFits with a lower</span></span>
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<pre style="margin: 0;">-<span id="LC454" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- refinement level to come first.</span></span>
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<pre style="margin: 0;">-<span id="LC455" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Ord</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC456" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</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;">EQ</span></span>
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<pre style="margin: 0;">-<span id="LC457" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</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;">LT</span></span>
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458
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<pre style="margin: 0;">-<span id="LC458" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</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;">GT</span></span>
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459
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<pre style="margin: 0;">-<span id="LC459" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{})</span> <span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cmp</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span></span>
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460
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<pre style="margin: 0;">-<span id="LC460" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">cmp</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="n" style="color: #333;">b</span></span>
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461
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<pre style="margin: 0;">-<span id="LC461" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">compare</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfName</span></span>
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462
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<pre style="margin: 0;">-<span id="LC462" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">compare</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfRefLvl</span></span>
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<pre style="margin: 0;">-<span id="LC463" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC464" 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;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC465" 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;">pprHoleFit</span> <span class="n" style="color: #333;">debugHoleFitDispConfig</span></span>
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<pre style="margin: 0;">-<span id="LC466" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC447" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If enabled, we go through the fits and add any associated documentation,</span></span>
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<pre style="margin: 0;"> <span id="LC448" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- by looking it up in the module or the environment (for local fits)</span></span>
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<pre style="margin: 0;"> <span id="LC449" class="line" lang="haskell"><span class="n" style="color: #333;">addDocs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</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">@@ -952,16 +932,6 @@ tcSubsumes :: TcSigmaType -> TcSigmaType -> TcM Bool</td>
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<pre style="margin: 0;"> <span id="LC932" class="line" lang="haskell"><span class="n" style="color: #333;">tcSubsumes</span> <span class="n" style="color: #333;">ty_a</span> <span class="n" style="color: #333;">ty_b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">tcCheckHoleFit</span> <span class="n" style="color: #333;">dummyHole</span> <span class="n" style="color: #333;">ty_a</span> <span class="n" style="color: #333;">ty_b</span></span>
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<pre style="margin: 0;"> <span id="LC933" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">dummyHole</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TyH</span> <span class="n" style="color: #333;">emptyBag</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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<pre style="margin: 0;"> <span id="LC934" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC955" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC956" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC959" class="line" lang="haskell"><span class="n" style="color: #333;">fromPurePlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span></span>
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<pre style="margin: 0;">-<span id="LC960" class="line" lang="haskell"><span class="n" style="color: #333;">fromPurePlugin</span> <span class="n" style="color: #333;">plug</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC961" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span> <span class="p">{</span> <span class="n" style="color: #333;">hfPluginInit</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">newTcRef</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC962" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">holeFitPluginR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">const</span> <span class="n" style="color: #333;">plug</span></span>
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<pre style="margin: 0;">-<span id="LC963" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfPluginStop</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">const</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC964" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC935" class="line" lang="haskell"><span class="cd">-- | A tcSubsumes which takes into account relevant constraints, to fix trac</span></span>
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<pre style="margin: 0;"> <span id="LC936" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- #14273. This makes sure that when checking whether a type fits the hole,</span></span>
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<pre style="margin: 0;"> <span id="LC937" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the type has to be subsumed by type of the hole as well as fulfill all</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">@@ -1022,3 +992,10 @@ tcCheckHoleFit (TyH {..}) hole_ty ty = discardErrs $</td>
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<pre style="margin: 0;"> <span id="LC992" class="line" lang="haskell"> <span class="n" style="color: #333;">setWCAndBinds</span> <span class="n" style="color: #333;">binds</span> <span class="n" style="color: #333;">imp</span> <span class="n" style="color: #333;">wc</span></span>
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<pre style="margin: 0;"> <span id="LC993" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">WC</span> <span class="p">{</span> <span class="n" style="color: #333;">wc_simple</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyBag</span></span>
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<pre style="margin: 0;"> <span id="LC994" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">wc_impl</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unitBag</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">imp</span> <span class="p">{</span> <span class="n" style="color: #333;">ic_wanted</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wc</span> <span class="p">,</span> <span class="n" style="color: #333;">ic_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">binds</span> <span class="p">}</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC995" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC996" class="line" lang="haskell"><span class="cd">-- | Maps a plugin that needs no state to one with an empty one.</span></span>
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<pre style="margin: 0;">+<span id="LC997" class="line" lang="haskell"><span class="n" style="color: #333;">fromPureHFPlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span></span>
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<pre style="margin: 0;">+<span id="LC998" class="line" lang="haskell"><span class="n" style="color: #333;">fromPureHFPlugin</span> <span class="n" style="color: #333;">plug</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC999" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span> <span class="p">{</span> <span class="n" style="color: #333;">hfPluginInit</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">newTcRef</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC1000" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">holeFitPluginR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">const</span> <span class="n" style="color: #333;">plug</span></span>
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<pre style="margin: 0;">+<span id="LC1001" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfPluginStop</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">const</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">}</span></span></pre>
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<li id="d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/35eca34c669e01d0ca2c812b5186c0d2c7c36da0#d2ddf5ce2d076f8584d9825af8ea0d7ea0a38813"><strong>compiler/typecheck/TcRnTypes.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">@@ -202,6 +202,7 @@ import CostCentreState</td>
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<pre style="margin: 0;"> <span id="LC202" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">ap</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">liftM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">msum</span><span class="p">)</span></span>
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203
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203
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<pre style="margin: 0;"> <span id="LC203" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Control.Monad.Fail</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">MonadFail</span></span>
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204
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<pre style="margin: 0;"> <span id="LC204" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Set</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Set</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC205" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Function</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">on</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC206" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.Set</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">S</span></span>
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC208" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">sort</span> <span class="p">)</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">@@ -3942,27 +3943,14 @@ instance Outputable TypedHole where</td>
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3943
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<pre style="margin: 0;"> <span id="LC3943" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"TypedHole"</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span></span>
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3943
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3944
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<pre style="margin: 0;"> <span id="LC3944" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">rels</span> <span class="o" style="font-weight: 600;">$+$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">implics</span> <span class="o" style="font-weight: 600;">$+$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ct</span><span class="p">)</span></span>
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3945
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<pre style="margin: 0;"> <span id="LC3945" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3945" class="line" lang="haskell"><span class="cd">-- | A plugin for modifying the candidate hole fits *before* they're checked.</span></span>
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3946
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<pre style="margin: 0;">-<span id="LC3946" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">CandPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TypedHole</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC3947" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3948" class="line" lang="haskell"><span class="cd">-- | A plugin for modifying hole fits *after* they've been found.</span></span>
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<pre style="margin: 0;">-<span id="LC3949" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">FitPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TypedHole</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC3950" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3951" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span></span>
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<pre style="margin: 0;">-<span id="LC3952" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">candPlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CandPlugin</span></span>
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<pre style="margin: 0;">-<span id="LC3953" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">fitPlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FitPlugin</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC3954" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3955" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">s</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span></span>
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<pre style="margin: 0;">-<span id="LC3956" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">hfPluginInit</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC3957" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">holeFitPluginR</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span></span>
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<pre style="margin: 0;">-<span id="LC3958" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfPluginStop</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span> <span class="p">}</span></span>
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3946
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<pre style="margin: 0;"> <span id="LC3946" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC3960" class="line" lang="haskell"><span class="cd">-- | HoleFitCandidates are passed to <span class="idiff left right">the filter and checked whether they can be</span></span></span>
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<pre style="margin: 0;">-<span id="LC3961" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">made to fit</span>.</span></span>
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<pre style="margin: 0;">+<span id="LC3947" class="line" lang="haskell"><span class="cd">-- | HoleFitCandidates are passed to <span class="idiff left right">hole fit plugins and then</span></span></span>
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<pre style="margin: 0;">+<span id="LC3948" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">checked whether they fit a given typed-hole</span>.</span></span>
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<pre style="margin: 0;"> <span id="LC3949" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IdHFCand</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="c1" style="color: #998; font-style: italic;">-- An id, like locals.</span></span>
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<pre style="margin: 0;"> <span id="LC3950" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">NameHFCand</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="c1" style="color: #998; font-style: italic;">-- A name, like built-in syntax.</span></span>
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<pre style="margin: 0;"> <span id="LC3951" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">GreHFCand</span> <span class="kt" style="color: #458; font-weight: 600;">GlobalRdrElt</span> <span class="c1" style="color: #998; font-style: italic;">-- A global, like imported ids.</span></span>
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<pre style="margin: 0;"> <span id="LC3952" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC3953" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC3954" 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;">HoleFitCandidate</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC3955" 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;">pprHoleFitCand</span></span>
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<pre style="margin: 0;"> <span id="LC3956" class="line" lang="haskell"></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">@@ -3977,20 +3965,70 @@ instance HasOccName HoleFitCandidate where</td>
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<pre style="margin: 0;"> <span id="LC3965" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">NameHFCand</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">occName</span> <span class="n" style="color: #333;">name</span></span>
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<pre style="margin: 0;"> <span id="LC3966" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">GreHFCand</span> <span class="n" style="color: #333;">gre</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">occName</span> <span class="p">(</span><span class="n" style="color: #333;">gre_name</span> <span class="n" style="color: #333;">gre</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC3967" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3968" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Ord</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span> <span class="kr" style="font-weight: 600;">where</span></span>
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3969
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<pre style="margin: 0;">+<span id="LC3969" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">compare</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">occName</span></span>
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3970
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<pre style="margin: 0;">+<span id="LC3970" class="line" lang="haskell"></span>
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3980
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3971
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<pre style="margin: 0;"> <span id="LC3971" class="line" lang="haskell"><span class="cd">-- | HoleFit is the type we use for valid hole fits. It contains the</span></span>
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3981
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3972
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<pre style="margin: 0;"> <span id="LC3972" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- element that was checked, the Id of that element as found by `tcLookup`,</span></span>
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3982
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3973
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<pre style="margin: 0;"> <span id="LC3973" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and the refinement level of the fit, which is the number of extra argument</span></span>
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3983
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3974
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<pre style="margin: 0;"> <span id="LC3974" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- holes that this fit uses (e.g. if hfRefLvl is 2, the fit is for `Id _ _`).</span></span>
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3984
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3975
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<pre style="margin: 0;"> <span id="LC3975" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="o" style="font-weight: 600;">=</span></span>
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3985
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<pre style="margin: 0;">-<span id="LC3985" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{</span> <span class="n" style="color: #333;">hfId</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="c1" style="color: #998; font-style: italic;">-- The elements id in the TcM</span></span>
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3986
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<pre style="margin: 0;">-<span id="LC3986" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfCand</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span> <span class="c1" style="color: #998; font-style: italic;">-- The candidate that was checked.</span></span>
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3987
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<pre style="margin: 0;">-<span id="LC3987" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="c1" style="color: #998; font-style: italic;">-- The type of the id, possibly zonked.</span></span>
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3988
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<pre style="margin: 0;">-<span id="LC3988" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="c1" style="color: #998; font-style: italic;">-- The number of holes in this fit.</span></span>
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3989
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<pre style="margin: 0;">-<span id="LC3989" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfWrap</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- The wrapper for the match.</span></span>
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3990
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<pre style="margin: 0;">-<span id="LC3990" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfMatches</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- What the refinement variables got matched</span></span>
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3991
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<pre style="margin: 0;">-<span id="LC3991" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- with, if anything</span></span>
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3992
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<pre style="margin: 0;">-<span id="LC3992" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfDoc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">HsDocString</span> <span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- Documentation of this HoleFit, if</span></span>
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3993
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<pre style="margin: 0;">-<span id="LC3993" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- available.</span></span>
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3976
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<pre style="margin: 0;">+<span id="LC3976" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{</span> <span class="n" style="color: #333;">hfId</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The elements id in the TcM</span></span>
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3977
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<pre style="margin: 0;">+<span id="LC3977" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfCand</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The candidate that was checked.</span></span>
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3978
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<pre style="margin: 0;">+<span id="LC3978" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcType</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The type of the id, possibly zonked.</span></span>
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3979
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<pre style="margin: 0;">+<span id="LC3979" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The number of holes in this fit.</span></span>
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3980
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<pre style="margin: 0;">+<span id="LC3980" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfWrap</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ The wrapper for the match.</span></span>
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<pre style="margin: 0;">+<span id="LC3981" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfMatches</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">TcType</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC3982" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ What the refinement variables got matched with, if anything</span></span>
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<pre style="margin: 0;">+<span id="LC3983" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfDoc</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">HsDocString</span></span>
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3984
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<pre style="margin: 0;">+<span id="LC3984" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ Documentation of this HoleFit, if available.</span></span>
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<pre style="margin: 0;">+<span id="LC3985" class="line" lang="haskell"> <span class="p">}</span></span>
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3994
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3986
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<pre style="margin: 0;"> <span id="LC3986" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>
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3987
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<pre style="margin: 0;"> <span id="LC3987" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ A fit that is just displayed as is. Here so thatHoleFitPlugins</span></span>
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<pre style="margin: 0;"> <span id="LC3988" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- can inject any fit they want.</span></span>
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<pre style="margin: 0;">+<span id="LC3989" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3990" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We define an Eq and Ord instance to be able to build a graph.</span></span>
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<pre style="margin: 0;">+<span id="LC3991" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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3992
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<pre style="margin: 0;">+<span id="LC3992" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span><span class="p">)</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfId</span></span>
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<pre style="margin: 0;">+<span id="LC3993" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3994" 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;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC3995" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="n" style="color: #333;">sd</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sd</span></span>
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<pre style="margin: 0;">+<span id="LC3996" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">cand</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">mtchs</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="LC3997" class="line" lang="haskell"> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">holes</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"where"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC3998" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">occName</span> <span class="n" style="color: #333;">cand</span></span>
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<pre style="margin: 0;">+<span id="LC3999" class="line" lang="haskell"> <span class="n" style="color: #333;">holes</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</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;">parens</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"_"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">ppr</span><span class="p">)</span> <span class="n" style="color: #333;">mtchs</span></span>
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<pre style="margin: 0;">+<span id="LC4000" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4001" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We compare HoleFits by their name instead of their Id, since we don't</span></span>
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4002
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<pre style="margin: 0;">+<span id="LC4002" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- want our tests to be affected by the non-determinism of `nonDetCmpVar`,</span></span>
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4003
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<pre style="margin: 0;">+<span id="LC4003" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- which is used to compare Ids. When comparing, we want HoleFits with a lower</span></span>
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4004
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<pre style="margin: 0;">+<span id="LC4004" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- refinement level to come first.</span></span>
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4005
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<pre style="margin: 0;">+<span id="LC4005" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Ord</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<td class="diff-line-num new new_line" data-linenumber="4006" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
4006
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<pre style="margin: 0;">+<span id="LC4006" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</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;">EQ</span></span>
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4007
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<pre style="margin: 0;">+<span id="LC4007" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</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;">LT</span></span>
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4008
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<pre style="margin: 0;">+<span id="LC4008" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RawHoleFit</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;">GT</span></span>
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4009
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<pre style="margin: 0;">+<span id="LC4009" class="line" lang="haskell"> <span class="n" style="color: #333;">compare</span> <span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{})</span> <span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cmp</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span></span>
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4010
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<pre style="margin: 0;">+<span id="LC4010" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">cmp</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">hfRefLvl</span> <span class="n" style="color: #333;">b</span></span>
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4011
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<pre style="margin: 0;">+<span id="LC4011" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">compare</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfCand</span></span>
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4012
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<pre style="margin: 0;">+<span id="LC4012" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">compare</span> <span class="p">`</span><span class="n" style="color: #333;">on</span><span class="p">`</span> <span class="n" style="color: #333;">hfRefLvl</span></span>
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4013
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<pre style="margin: 0;">+<span id="LC4013" class="line" lang="haskell"></span>
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4014
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<pre style="margin: 0;">+<span id="LC4014" class="line" lang="haskell"></span>
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4015
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<pre style="margin: 0;">+<span id="LC4015" class="line" lang="haskell"><span class="cd">-- | A plugin for modifying the candidate hole fits *before* they're checked.</span></span>
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4016
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<pre style="margin: 0;">+<span id="LC4016" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">CandPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TypedHole</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFitCandidate</span><span class="p">]</span></span>
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4017
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<pre style="margin: 0;">+<span id="LC4017" class="line" lang="haskell"></span>
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4018
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<pre style="margin: 0;">+<span id="LC4018" class="line" lang="haskell"><span class="cd">-- | A plugin for modifying hole fits *after* they've been found.</span></span>
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4019
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<pre style="margin: 0;">+<span id="LC4019" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">FitPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TypedHole</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">HoleFit</span><span class="p">]</span></span>
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4020
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<pre style="margin: 0;">+<span id="LC4020" class="line" lang="haskell"></span>
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4021
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<pre style="margin: 0;">+<span id="LC4021" class="line" lang="haskell"><span class="cd">-- | A HoleFitPlugin is a pair of candidate and fit plugins.</span></span>
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<pre style="margin: 0;">+<span id="LC4022" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span></span>
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<pre style="margin: 0;">+<span id="LC4023" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">candPlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CandPlugin</span></span>
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4024
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<pre style="margin: 0;">+<span id="LC4024" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">fitPlugin</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">FitPlugin</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC4025" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4026" class="line" lang="haskell"><span class="cd">-- | HoleFitPluginR allows plugins to use an internal TcRef for tracking state.</span></span>
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<pre style="margin: 0;">+<span id="LC4027" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">s</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPluginR</span></span>
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<pre style="margin: 0;">+<span id="LC4028" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">hfPluginInit</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC4029" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ Initializes the TcRef to be passed to the plugin</span></span>
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<pre style="margin: 0;">+<span id="LC4030" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">holeFitPluginR</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HoleFitPlugin</span></span>
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<pre style="margin: 0;">+<span id="LC4031" 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="LC4032" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">hfPluginStop</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRef</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC4033" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ^ Cleanup of state, guaranteed to be called even on error.</span></span>
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<pre style="margin: 0;">+<span id="LC4034" class="line" lang="haskell"> <span class="p">}</span></span></pre>
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