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<h3>

Richard Eisenberg pushed to branch wip/T18998

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

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc">d1998b7f</a></strong>

<div>

<span>by Richard Eisenberg</span>

<i>at 2020-12-10T23:06:51-05:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Unfortunate dirty hack to overcome #18998.

See commentary in tcCollectingUsage, which had to move

modules to avoid import loops.

Close #18998.

Test case: typecheck/should_compile/T18998

</pre>

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<h4>7 changed files:</h4>

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<li class="file-stats">

<a href="#f157d5c316465070f94641e4c9ab0248311588cd">

compiler/GHC/Core/UsageEnv.hs

</a>

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<li class="file-stats">

<a href="#6a1f039ed7725eddef15dd5f4dc318a3434f26c9">

compiler/GHC/Tc/Gen/App.hs

</a>

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<li class="file-stats">

<a href="#f021c52a6ccf306e88c9f760b2aee33b180ba341">

compiler/GHC/Tc/Utils/Env.hs

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<li class="file-stats">

<a href="#c6e4263ee64c68e57b7525127d98243fce38b1ea">

compiler/GHC/Tc/Utils/Monad.hs

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<a href="#10648d572b9751818be62fa538ab2e35274c8c64">

compiler/GHC/Types/Name/Env.hs

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<a href="#d1ca8fe66c86b35ccb7ad60d01d08c5b900c9cd7">

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+

testsuite/tests/typecheck/should_compile/T18998.hs

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<a href="#34fe7bf0e6fbf60effb28393399ba68666593909">

testsuite/tests/typecheck/should_compile/all.T

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<h4>Changes:</h4>

<li id="f157d5c316465070f94641e4c9ab0248311588cd">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#f157d5c316465070f94641e4c9ab0248311588cd"><strong>compiler/GHC/Core/UsageEnv.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -12,6 +12,7 @@ module GHC.Core.UsageEnv</td>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">  <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">supUEs</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell">  <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitUE</span></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">  <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">zeroUE</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">  <span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nonDetMapUEM</span></span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell">  <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

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

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Foldable</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="52" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="53" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -52,7 +53,9 @@ scaleUsage x   Bottom     = MUsage x</td>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"><span class="n" style="color: #333;">scaleUsage</span> <span class="n" style="color: #333;">x</span>   <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MUsage</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MUsage</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkMultMul</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>

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

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- For now, we use extra multiplicity Bottom for empty case.</span></span>

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<pre style="margin: 0;">-<span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span></span>

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<pre style="margin: 0;">+<span id="LC57" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span><span class="p">)</span>  <span class="c1" style="color: #998; font-style: italic;">-- ^ mapping from names to their multiplicities</span></span>

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<pre style="margin: 0;">+<span id="LC58" class="line" lang="haskell">             <span class="kt" style="color: #458; font-weight: 600;">Bool</span>            <span class="c1" style="color: #998; font-style: italic;">-- ^ True <=> this is a bottom 'UsageEnv'; used for empty case</span></span>

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59

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

</pre>

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<td class="diff-line-num old_line" data-linenumber="57" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

57

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60

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell"><span class="n" style="color: #333;">unitUE</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NamedThing</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span></span>

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58

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<td class="diff-line-num new_line" data-linenumber="61" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

61

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"><span class="n" style="color: #333;">unitUE</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="p">(</span><span class="n" style="color: #333;">unitNameEnv</span> <span class="p">(</span><span class="n" style="color: #333;">getName</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">w</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="100" style="width: 35px; color: rgba(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="103" style="width: 35px; color: rgba(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">@@ -100,3 +103,10 @@ lookupUE (UsageEnv e has_bottom) x =</td>

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100

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103

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<pre style="margin: 0;"> <span id="LC103" class="line" lang="haskell"></span>

</pre>

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

101

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104

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<pre style="margin: 0;"> <span id="LC104" 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;">UsageEnv</span> <span class="kr" style="font-weight: 600;">where</span></span>

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

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

105

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<pre style="margin: 0;"> <span id="LC105" 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;">UsageEnv</span> <span class="n" style="color: #333;">ne</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"UsageEnv:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ne</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"><span class="cd">-- | Perform a applicative operation on all the 'Mult's in a 'UsageEnv'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The operation should *not* care about the order in which the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="109" style="width: 35px; color: rgba(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="LC109" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- environment is traversed.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="110" style="width: 35px; color: rgba(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="LC110" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetMapUEM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Mult</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="111" style="width: 35px; color: rgba(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="LC111" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetMapUEM</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">is_bottom</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="112" style="width: 35px; color: rgba(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="LC112" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">nonDetTraverseNameEnv</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;"><*></span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">is_bottom</span></span></pre>

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<br>

</li>

<li id="6a1f039ed7725eddef15dd5f4dc318a3434f26c9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#6a1f039ed7725eddef15dd5f4dc318a3434f26c9"><strong>compiler/GHC/Tc/Gen/App.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -25,6 +25,7 @@ import {-# SOURCE #-} GHC.Tc.Gen.Expr( tcCheckPolyExprNC )</td>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Builtin.Types</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">multiplicityTy</span><span class="p">)</span></span>

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26

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Gen.Head</span></span>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Hs</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Env</span>       <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">tcScalingUsage</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Monad</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Unify</span></span>

</pre>

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30

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<td class="diff-line-num new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Tc.Utils.Instantiate</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1087" style="width: 35px; color: rgba(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="1088" style="width: 35px; color: rgba(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">@@ -1087,5 +1088,3 @@ tcTagToEnum expr fun args app_res_ty res_ty</td>

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<pre style="margin: 0;"> <span id="LC1088" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1089" class="line" lang="haskell"><span class="n" style="color: #333;">tcExprPrag</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsPragE</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;">HsPragE</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1090" class="line" lang="haskell"><span class="n" style="color: #333;">tcExprPrag</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsPragSCC</span> <span class="n" style="color: #333;">x1</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">ann</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsPragSCC</span> <span class="n" style="color: #333;">x1</span> <span class="n" style="color: #333;">src</span> <span class="n" style="color: #333;">ann</span></span></pre>

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<pre style="margin: 0;">-<span id="LC1090" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1091" class="line" lang="haskell"></span></pre>

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<br>

</li>

<li id="f021c52a6ccf306e88c9f760b2aee33b180ba341">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#f021c52a6ccf306e88c9f760b2aee33b180ba341"><strong>compiler/GHC/Tc/Utils/Env.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="47" style="width: 35px; color: rgba(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="47" style="width: 35px; color: rgba(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">@@ -47,6 +47,9 @@ module GHC.Tc.Utils.Env(</td>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell">        <span class="n" style="color: #333;">getTypeSigNames</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell">        <span class="n" style="color: #333;">tcExtendRecEnv</span><span class="p">,</span>         <span class="c1" style="color: #998; font-style: italic;">-- For knot-tying</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="50" style="width: 35px; color: rgba(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="LC50" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Usage environment</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="50" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="51" style="width: 35px; color: rgba(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="LC51" class="line" lang="haskell">        <span class="n" style="color: #333;">tcCollectingUsage</span><span class="p">,</span> <span class="n" style="color: #333;">tcScalingUsage</span><span class="p">,</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="50" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="52" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

52

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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Tidying</span></span>

</pre>

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54

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell">        <span class="n" style="color: #333;">tcInitTidyEnv</span><span class="p">,</span> <span class="n" style="color: #333;">tcInitOpenTidyEnv</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="52" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

52

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<td class="diff-line-num new_line" data-linenumber="55" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

55

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"></span>

</pre>

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

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

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -102,6 +105,7 @@ import GHC.Core.ConLike</td>

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

102

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

105

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<pre style="margin: 0;"> <span id="LC105" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.TyCon</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

103

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

106

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<pre style="margin: 0;"> <span id="LC106" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span></span>

</pre>

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

104

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<td class="diff-line-num new_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

107

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<pre style="margin: 0;"> <span id="LC107" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion.Axiom</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

108

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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Coercion</span></span>

</pre>

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

105

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<td class="diff-line-num new_line" data-linenumber="109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

109

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Class</span></span>

</pre>

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

106

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<td class="diff-line-num new_line" data-linenumber="110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

110

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

107

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<td class="diff-line-num new_line" data-linenumber="111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

111

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Unit.Module</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="137" style="width: 35px; color: rgba(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="141" style="width: 35px; color: rgba(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">@@ -137,6 +141,8 @@ import Data.IORef</td>

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<td class="diff-line-num old_line" data-linenumber="137" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

137

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<td class="diff-line-num new_line" data-linenumber="141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

141

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<pre style="margin: 0;"> <span id="LC141" 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;">intercalate</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

138

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<td class="diff-line-num new_line" data-linenumber="142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

142

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

139

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<td class="diff-line-num new_line" data-linenumber="143" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

143

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="144" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

144

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<pre style="margin: 0;">+<span id="LC144" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Driver.Ppr</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="145" style="width: 35px; color: rgba(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="LC145" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

140

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<td class="diff-line-num new_line" data-linenumber="146" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

146

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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

141

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<td class="diff-line-num new_line" data-linenumber="147" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

147

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<pre style="margin: 0;"> <span id="LC147" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

142

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<td class="diff-line-num new_line" data-linenumber="148" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC148" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">            An IO interface to looking up globals</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="667" style="width: 35px; color: rgba(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="673" style="width: 35px; color: rgba(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">@@ -667,6 +673,67 @@ tcCheckUsage name id_mult thing_inside</td>

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<td class="diff-line-num old_line" data-linenumber="667" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

667

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<td class="diff-line-num new_line" data-linenumber="673" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

673

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<pre style="margin: 0;"> <span id="LC673" class="line" lang="haskell">           <span class="p">;</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="p">(</span><span class="n" style="color: #333;">deleteUE</span> <span class="n" style="color: #333;">uenv</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC674" class="line" lang="haskell">           <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">wrapper</span> <span class="p">}</span></span>

</pre>

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669

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675

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<pre style="margin: 0;"> <span id="LC675" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC676" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC677" class="line" lang="haskell"><span class="cd">-- | @tcCollectingUsage thing_inside@ runs @thing_inside@ and returns the usage</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="678" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

678

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<pre style="margin: 0;">+<span id="LC678" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- information which was collected as part of the execution of</span></span>

</pre>

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679

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<pre style="margin: 0;">+<span id="LC679" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @thing_inside@. Careful: @tcCollectingUsage thing_inside@ itself does not</span></span>

</pre>

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680

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<pre style="margin: 0;">+<span id="LC680" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- report any usage information, it's up to the caller to incorporate the</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC681" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- returned usage information into the larger context appropriately.</span></span>

</pre>

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682

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<pre style="margin: 0;">+<span id="LC682" class="line" lang="haskell"><span class="n" style="color: #333;">tcCollectingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span><span class="p">,</span><span class="n" style="color: #333;">a</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC683" class="line" lang="haskell"><span class="n" style="color: #333;">tcCollectingUsage</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC684" 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;">env0</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLclEnv</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC685" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">local_usage_ref</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newTcRef</span> <span class="n" style="color: #333;">zeroUE</span></span>

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<pre style="margin: 0;">+<span id="LC686" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env0</span> <span class="p">{</span> <span class="n" style="color: #333;">tcl_usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">local_usage_ref</span> <span class="p">}</span></span>

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687

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<pre style="margin: 0;">+<span id="LC687" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">setLclEnv</span> <span class="n" style="color: #333;">env1</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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688

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<pre style="margin: 0;">+<span id="LC688" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">local_usage</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">readTcRef</span> <span class="n" style="color: #333;">local_usage_ref</span></span>

</pre>

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689

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<pre style="margin: 0;">+<span id="LC689" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">promoted_usage</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">nonDetMapUEM</span> <span class="n" style="color: #333;">promote_mult</span> <span class="n" style="color: #333;">local_usage</span></span>

</pre>

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690

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<pre style="margin: 0;">+<span id="LC690" 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;">promoted_usage</span><span class="p">,</span><span class="n" style="color: #333;">result</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="691" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

691

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<pre style="margin: 0;">+<span id="LC691" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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692

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<pre style="margin: 0;">+<span id="LC692" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- This is gross. The problem is in test case typecheck/should_compile/T18998:</span></span>

</pre>

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693

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<pre style="margin: 0;">+<span id="LC693" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--   f :: a %1-> Id n a -> Id n a</span></span>

</pre>

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694

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<pre style="margin: 0;">+<span id="LC694" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--   f x (MkId _) = MkId x</span></span>

</pre>

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695

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<pre style="margin: 0;">+<span id="LC695" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- where MkId is a GADT constructor. Multiplicity polymorphism of constructors</span></span>

</pre>

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696

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<pre style="margin: 0;">+<span id="LC696" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- invents a new multiplicity variable p[2] for the application MkId x. This</span></span>

</pre>

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697

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<pre style="margin: 0;">+<span id="LC697" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- variable is at level 2, bumped because of the GADT pattern-match (MkId _).</span></span>

</pre>

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698

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<pre style="margin: 0;">+<span id="LC698" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- We eventually unify the variable with One, due to the call to tcSubMult in</span></span>

</pre>

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699

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<pre style="margin: 0;">+<span id="LC699" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- tcCheckUsage. But by then, we're at TcLevel 1, and so the level-check</span></span>

</pre>

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700

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<pre style="margin: 0;">+<span id="LC700" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- fails.</span></span>

</pre>

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701

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<pre style="margin: 0;">+<span id="LC701" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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702

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<pre style="margin: 0;">+<span id="LC702" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- What to do? If we did inference "for real", the sub-multiplicity constraint</span></span>

</pre>

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703

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<pre style="margin: 0;">+<span id="LC703" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- would end up in the implication of the GADT pattern-match, and all would</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="704" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

704

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<pre style="margin: 0;">+<span id="LC704" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- be well. But we don't have a real sub-multiplicity constraint to put in</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="705" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

705

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<pre style="margin: 0;">+<span id="LC705" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the implication. (Multiplicity inference works outside the usual generate-</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="706" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

706

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<pre style="margin: 0;">+<span id="LC706" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- constraints-and-solve scheme.) Here, where the multiplicity arrives, we</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="707" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

707

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<pre style="margin: 0;">+<span id="LC707" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- must promote all multiplicity variables to reflect this outer TcLevel.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="708" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

708

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<pre style="margin: 0;">+<span id="LC708" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It's reminiscent of floating a constraint, really, so promotion is</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="709" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

709

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<pre style="margin: 0;">+<span id="LC709" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- appropriate. The promoteTcType function works only on types of kind TYPE rr,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="710" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

710

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<pre style="margin: 0;">+<span id="LC710" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- so we can't use it here. Thus, this dirtiness.</span></span>

</pre>

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711

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<pre style="margin: 0;">+<span id="LC711" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="712" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

712

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<pre style="margin: 0;">+<span id="LC712" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- It works nicely in practice.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="713" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

713

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<pre style="margin: 0;">+<span id="LC713" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">promote_mult</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapTyCo</span> <span class="n" style="color: #333;">mapper</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="714" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

714

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<pre style="margin: 0;">+<span id="LC714" class="line" lang="haskell">    <span class="n" style="color: #333;">mapper</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TyCoMapper</span> <span class="p">{</span> <span class="n" style="color: #333;">tcm_tyvar</span> <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="nb" style="color: #0086b3;">()</span> <span class="n" style="color: #333;">tv</span> <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;">_</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">promoteTyVar</span> <span class="n" style="color: #333;">tv</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="715" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

715

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<pre style="margin: 0;">+<span id="LC715" class="line" lang="haskell">                                                    <span class="p">;</span> <span class="n" style="color: #333;">zonkTcTyVar</span> <span class="n" style="color: #333;">tv</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="716" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

716

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<pre style="margin: 0;">+<span id="LC716" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">tcm_covar</span> <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="nb" style="color: #0086b3;">()</span> <span class="n" style="color: #333;">cv</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoVarCo</span> <span class="n" style="color: #333;">cv</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="717" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

717

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<pre style="margin: 0;">+<span id="LC717" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">tcm_hole</span>  <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="nb" style="color: #0086b3;">()</span> <span class="n" style="color: #333;">h</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkHoleCo</span> <span class="n" style="color: #333;">h</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

718

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<pre style="margin: 0;">+<span id="LC718" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">tcm_tycobinder</span> <span class="o" style="font-weight: 600;">=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="nb" style="color: #0086b3;">()</span> <span class="n" style="color: #333;">tcv</span> <span class="n" style="color: #333;">_flag</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="nb" style="color: #0086b3;">()</span><span class="p">,</span> <span class="n" style="color: #333;">tcv</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="719" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

719

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<pre style="margin: 0;">+<span id="LC719" class="line" lang="haskell">                        <span class="p">,</span> <span class="n" style="color: #333;">tcm_tycon</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">}</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="720" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

720

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<pre style="margin: 0;">+<span id="LC720" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="721" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

721

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<pre style="margin: 0;">+<span id="LC721" class="line" lang="haskell"><span class="cd">-- | @tcScalingUsage mult thing_inside@ runs @thing_inside@ and scales all the</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="722" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

722

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<pre style="margin: 0;">+<span id="LC722" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- usage information by @mult@.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="723" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

723

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<pre style="margin: 0;">+<span id="LC723" class="line" lang="haskell"><span class="n" style="color: #333;">tcScalingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="724" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

724

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<pre style="margin: 0;">+<span id="LC724" class="line" lang="haskell"><span class="n" style="color: #333;">tcScalingUsage</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="725" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

725

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<pre style="margin: 0;">+<span id="LC725" 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="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">result</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcCollectingUsage</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

726

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<pre style="margin: 0;">+<span id="LC726" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcScalingUsage"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mult</span><span class="p">)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="727" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

727

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<pre style="margin: 0;">+<span id="LC727" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">scaleUE</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">usage</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="728" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

728

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<pre style="margin: 0;">+<span id="LC728" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">result</span> <span class="p">}</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="729" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

729

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

<pre style="margin: 0;">+<span id="LC729" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="730" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

730

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<pre style="margin: 0;">+<span id="LC730" class="line" lang="haskell"><span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="731" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

731

</td>

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<pre style="margin: 0;">+<span id="LC731" class="line" lang="haskell"><span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="n" style="color: #333;">ue</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="732" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

732

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<pre style="margin: 0;">+<span id="LC732" 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;">lcl_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLclEnv</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="733" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

733

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<pre style="margin: 0;">+<span id="LC733" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcl_usage</span> <span class="n" style="color: #333;">lcl_env</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="734" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

734

</td>

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<pre style="margin: 0;">+<span id="LC734" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">updTcRef</span> <span class="n" style="color: #333;">usage</span> <span class="p">(</span><span class="n" style="color: #333;">addUE</span> <span class="n" style="color: #333;">ue</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="735" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

735

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<pre style="margin: 0;">+<span id="LC735" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="736" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

736

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<pre style="margin: 0;">+<span id="LC736" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="670" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

670

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<td class="diff-line-num new_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

737

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<pre style="margin: 0;"> <span id="LC737" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- *********************************************************************</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="671" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

671

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<td class="diff-line-num new_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

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<pre style="margin: 0;"> <span id="LC738" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="672" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

672

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<td class="diff-line-num new_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

739

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<pre style="margin: 0;"> <span id="LC739" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">             The TcBinderStack</span></span>

</pre>

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<br>

</li>

<li id="c6e4263ee64c68e57b7525127d98243fce38b1ea">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#c6e4263ee64c68e57b7525127d98243fce38b1ea"><strong>compiler/GHC/Tc/Utils/Monad.hs</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="71" style="width: 35px; color: rgba(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="71" style="width: 35px; color: rgba(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">@@ -71,9 +71,6 @@ module GHC.Tc.Utils.Monad(</td>

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71

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<td class="diff-line-num new_line" data-linenumber="71" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

71

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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell">  <span class="n" style="color: #333;">addMessages</span><span class="p">,</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="72" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

72

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<td class="diff-line-num new_line" data-linenumber="72" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

72

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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell">  <span class="n" style="color: #333;">discardWarnings</span><span class="p">,</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

73

</td>

<td class="diff-line-num new_line" data-linenumber="73" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

73

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

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

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

74

</td>

<td class="diff-line-num new_line old" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC74" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- * Usage environment</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="75" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

75

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<td class="diff-line-num new_line old" data-linenumber="74" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC75" class="line" lang="haskell">  <span class="n" style="color: #333;">tcCollectingUsage</span><span class="p">,</span> <span class="n" style="color: #333;">tcScalingUsage</span><span class="p">,</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC76" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC74" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- * Shared error message stuff: renamer and typechecker</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell">  <span class="n" style="color: #333;">mkLongErrAt</span><span class="p">,</span> <span class="n" style="color: #333;">mkErrDocAt</span><span class="p">,</span> <span class="n" style="color: #333;">addLongErrAt</span><span class="p">,</span> <span class="n" style="color: #333;">reportErrors</span><span class="p">,</span> <span class="n" style="color: #333;">reportError</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell">  <span class="n" style="color: #333;">reportWarning</span><span class="p">,</span> <span class="n" style="color: #333;">recoverM</span><span class="p">,</span> <span class="n" style="color: #333;">mapAndRecoverM</span><span class="p">,</span> <span class="n" style="color: #333;">mapAndReportM</span><span class="p">,</span> <span class="n" style="color: #333;">foldAndRecoverM</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">@@ -1273,36 +1270,6 @@ captureConstraints thing_inside</td>

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<pre style="margin: 0;"> <span id="LC1270" class="line" lang="haskell">           <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">emitConstraints</span> <span class="n" style="color: #333;">lie</span><span class="p">;</span> <span class="n" style="color: #333;">failM</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC1271" class="line" lang="haskell">           <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">res</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">res</span><span class="p">,</span> <span class="n" style="color: #333;">lie</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC1272" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1276" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1277" class="line" lang="haskell"><span class="cd">-- | @tcCollectingUsage thing_inside@ runs @thing_inside@ and returns the usage</span></span>

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<pre style="margin: 0;">-<span id="LC1278" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- information which was collected as part of the execution of</span></span>

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<pre style="margin: 0;">-<span id="LC1279" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @thing_inside@. Careful: @tcCollectingUsage thing_inside@ itself does not</span></span>

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<td class="diff-line-num old old_line" data-linenumber="1280" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1280" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- report any usage information, it's up to the caller to incorporate the</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1281" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- returned usage information into the larger context appropriately.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1282" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1282" class="line" lang="haskell"><span class="n" style="color: #333;">tcCollectingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span><span class="p">,</span><span class="n" style="color: #333;">a</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1283" class="line" lang="haskell"><span class="n" style="color: #333;">tcCollectingUsage</span> <span class="n" style="color: #333;">thing_inside</span></span>

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<pre style="margin: 0;">-<span id="LC1284" 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;">env0</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLclEnv</span></span>

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<pre style="margin: 0;">-<span id="LC1285" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">local_usage_ref</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newTcRef</span> <span class="n" style="color: #333;">zeroUE</span></span>

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1286" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">env1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">env0</span> <span class="p">{</span> <span class="n" style="color: #333;">tcl_usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">local_usage_ref</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1287" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1287

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1287" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">setLclEnv</span> <span class="n" style="color: #333;">env1</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1288" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1288

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1288" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">local_usage</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">readTcRef</span> <span class="n" style="color: #333;">local_usage_ref</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1289" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1289

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1289" 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;">local_usage</span><span class="p">,</span><span class="n" style="color: #333;">result</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1290" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1290

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1290" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1291" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1291

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1291" class="line" lang="haskell"><span class="cd">-- | @tcScalingUsage mult thing_inside@ runs @thing_inside@ and scales all the</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1292

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1292" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- usage information by @mult@.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1293

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1293" class="line" lang="haskell"><span class="n" style="color: #333;">tcScalingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Mult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1294" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1294

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1294" class="line" lang="haskell"><span class="n" style="color: #333;">tcScalingUsage</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1295" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1295

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1295" 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="p">(</span><span class="n" style="color: #333;">usage</span><span class="p">,</span> <span class="n" style="color: #333;">result</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcCollectingUsage</span> <span class="n" style="color: #333;">thing_inside</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1296" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1296

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1296" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">traceTc</span> <span class="s" style="color: #d14;">"tcScalingUsage"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">mult</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1297" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1297

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1297" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">scaleUE</span> <span class="n" style="color: #333;">mult</span> <span class="n" style="color: #333;">usage</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1298" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1298

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1298" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">result</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1299" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1299

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1299" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1300" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1300

</td>

<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1300" class="line" lang="haskell"><span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">UsageEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1301" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1301

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1301" class="line" lang="haskell"><span class="n" style="color: #333;">tcEmitBindingUsage</span> <span class="n" style="color: #333;">ue</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1302" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1302

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1302" 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;">lcl_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getLclEnv</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1303" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1303

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1303" class="line" lang="haskell">       <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">usage</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcl_usage</span> <span class="n" style="color: #333;">lcl_env</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="1273" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1304" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">updTcRef</span> <span class="n" style="color: #333;">usage</span> <span class="p">(</span><span class="n" style="color: #333;">addUE</span> <span class="n" style="color: #333;">ue</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1305" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1305

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<pre style="margin: 0;">-<span id="LC1305" class="line" lang="haskell"></span>

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1273

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<pre style="margin: 0;"> <span id="LC1273" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------</span></span>

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<td class="diff-line-num old_line" data-linenumber="1307" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC1274" class="line" lang="haskell"><span class="n" style="color: #333;">attemptM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TcRn</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcRn</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">r</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC1275" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (attemptM thing_inside) runs thing_inside</span></span>

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<br>

</li>

<li id="10648d572b9751818be62fa538ab2e35274c8c64">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#10648d572b9751818be62fa538ab2e35274c8c64"><strong>compiler/GHC/Types/Name/Env.hs</strong></a>

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<pre style="margin: 0;"> <span id="LC8" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE BangPatterns #-}</span></span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ScopedTypeVariables #-}</span></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeApplications #-}</span></span>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Types.Name.Env</span> <span class="p">(</span></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- * Var, Id and TyVar environments (maps)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="23" style="width: 35px; color: rgba(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">@@ -22,7 +23,7 @@ module GHC.Types.Name.Env (</td>

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<td class="diff-line-num old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">plusNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">plusNameEnv_C</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">plusNameEnv_CD</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">plusNameEnv_CD2</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">alterNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">lookupNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupNameEnv_NF</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delFromNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">delListFromNameEnv</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">elemNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">disjointNameEnv</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">elemNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapNameEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">disjointNameEnv</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">nonDetTraverseNameEnv</span></span><span class="p"><span class="idiff right">,</span></span></span>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="44" style="width: 35px; color: rgba(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="45" style="width: 35px; color: rgba(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">@@ -44,6 +45,7 @@ import GHC.Types.Name</td>

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

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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique.DFM</span></span>

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<pre style="margin: 0;"> <span id="LC47" 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="LC48" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Coerce</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC50" 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="LC51" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="120" style="width: 35px; color: rgba(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="122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -120,6 +122,8 @@ filterNameEnv      :: (elt -> Bool) -> NameEnv elt -> NameEnv elt</td>

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell"><span class="n" style="color: #333;">anyNameEnv</span>         <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">elt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">elt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell"><span class="n" style="color: #333;">mapNameEnv</span>         <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">elt1</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">elt2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">elt1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">elt2</span></span>

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<pre style="margin: 0;"> <span id="LC124" class="line" lang="haskell"><span class="n" style="color: #333;">disjointNameEnv</span>    <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC125" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetTraverseNameEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span><span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="n" style="color: #333;">f</span></span>

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<pre style="margin: 0;">+<span id="LC126" class="line" lang="haskell">                      <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NameEnv</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"><span class="n" style="color: #333;">nameEnvElts</span> <span class="n" style="color: #333;">x</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eltsUFM</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"><span class="n" style="color: #333;">emptyNameEnv</span>          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">emptyUFM</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">@@ -145,6 +149,7 @@ delListFromNameEnv x y  = delListFromUFM x y</td>

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell"><span class="n" style="color: #333;">filterNameEnv</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">filterUFM</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>

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<pre style="margin: 0;"> <span id="LC150" class="line" lang="haskell"><span class="n" style="color: #333;">anyNameEnv</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">x</span>          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldUFM</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="n" style="color: #333;">f</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;"> <span id="LC151" class="line" lang="haskell"><span class="n" style="color: #333;">disjointNameEnv</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">disjointUFM</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetTraverseNameEnv</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">coerce</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">traverse</span> <span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonDetUniqFM</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">)</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">coerce</span> <span class="n" style="color: #333;">n</span></span>

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<pre style="margin: 0;"> <span id="LC153" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell"><span class="n" style="color: #333;">lookupNameEnv_NF</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">expectJust</span> <span class="s" style="color: #d14;">"lookupNameEnv_NF"</span> <span class="p">(</span><span class="n" style="color: #333;">lookupNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">n</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"></span>

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</li>

<li id="d1ca8fe66c86b35ccb7ad60d01d08c5b900c9cd7">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#d1ca8fe66c86b35ccb7ad60d01d08c5b900c9cd7"><strong>testsuite/tests/typecheck/should_compile/T18998.hs</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE LinearTypes, GADTs, DataKinds, KindSignatures #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- this caused a TcLevel assertion failure</span></span>

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18998</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types</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">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.TypeLits</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Nat</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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

</td>

<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MkId</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">%</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">%</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MkId</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;">MkId</span> <span class="n" style="color: #333;">a</span></span></pre>

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<li id="34fe7bf0e6fbf60effb28393399ba68666593909">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d1998b7ff0c590cee7ca80f0fe296aec3bece3bc#34fe7bf0e6fbf60effb28393399ba68666593909"><strong>testsuite/tests/typecheck/should_compile/all.T</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="737" style="width: 35px; color: rgba(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="737" style="width: 35px; color: rgba(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">@@ -737,3 +737,4 @@ test('InstanceGivenOverlap2', normal, compile, [''])</td>

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<td class="diff-line-num old_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

737

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<td class="diff-line-num new_line" data-linenumber="737" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

737

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<pre style="margin: 0;"> <span id="LC737" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

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<td class="diff-line-num new_line" data-linenumber="738" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

738

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<pre style="margin: 0;"> <span id="LC738" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LocalGivenEqs2</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

739

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<td class="diff-line-num new_line" data-linenumber="739" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

739

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<pre style="margin: 0;"> <span id="LC739" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18891</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="740" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

740

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<pre style="margin: 0;">+<span id="LC740" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18998</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span></pre>

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