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<h3>
Vladislav Zavialov pushed to branch wip/eqtycon-rn
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac">ebeb84bd</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-10-18T16:38:00+03:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Export (~) from Data.Type.Equality (#18862)
* Users can define their own (~) type operator
* Haddock can display documentation for the built-in (~)
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<h4>11 changed files:</h4>
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<li class="file-stats">
<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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<li class="file-stats">
<a href="#377cfd14c1f92357465df995ec6537b074051322">
compiler/GHC/Builtin/Types.hs
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<li class="file-stats">
<a href="#bf951467d4a9aa443cb109cb4c84a2891945649b">
compiler/GHC/Parser.y
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<li class="file-stats">
<a href="#446cb12ca6cefaf1c6eb79b7db643632744263c7">
compiler/GHC/Parser/PostProcess.hs
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<li class="file-stats">
<a href="#86d694037d496c511e28b2c09c8410f67dc19596">
compiler/GHC/Rename/Env.hs
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<li class="file-stats">
<a href="#05e673e1ddc71442761ccce2fe98ab4dc5af43db">
libraries/base/Data/Type/Equality.hs
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<a href="#48a6c03232a2b3f836daeff09b3c6e3790804632">
libraries/base/GHC/Exts.hs
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<li class="file-stats">
<a href="#e1dc7d84d8f2c952dba37b15142001f1d7952318">
libraries/ghc-prim/GHC/Types.hs
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<a href="#ac1e6a4c6d27ec40915dc871db3b80031880c519">
<span class="new-file">
+
testsuite/tests/rename/should_compile/T18862.hs
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<a href="#a4162a155076487da39ef091cacc50c633652a4d">
testsuite/tests/rename/should_compile/all.T
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<li class="file-stats">
<a href="#46ddb8dda2edd2df4717a3285e83997fc812a347">
utils/haddock
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<h4>Changes:</h4>
<li id="0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77"><strong>compiler/GHC/Builtin/Names.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2600" style="width: 35px; color: rgba(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">@@ -2600,4 +2600,5 @@ pretendNameIsInScope :: Name -> Bool</td>
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<pre style="margin: 0;"> <span id="LC2600" class="line" lang="haskell"><span class="n" style="color: #333;">pretendNameIsInScope</span> <span class="n" style="color: #333;">n</span></span>
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<pre style="margin: 0;"> <span id="LC2601" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">n</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`)</span></span>
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2602
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2602
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<pre style="margin: 0;"> <span id="LC2602" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">liftedTypeKindTyConKey</span><span class="p">,</span> <span class="n" style="color: #333;">tYPETyConKey</span></span>
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2603
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<pre style="margin: 0;">-<span id="LC2603" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">runtimeRepTyConKey</span><span class="p">,</span> <span class="n" style="color: #333;">liftedRepDataConKey</span> <span class="p">]</span></span></pre>
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2603
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<pre style="margin: 0;">+<span id="LC2603" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">runtimeRepTyConKey</span><span class="p">,</span> <span class="n" style="color: #333;">liftedRepDataConKey</span></span>
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<pre style="margin: 0;">+<span id="LC2604" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">eqTyConKey</span> <span class="p">]</span></span></pre>
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<li id="377cfd14c1f92357465df995ec6537b074051322">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#377cfd14c1f92357465df995ec6537b074051322"><strong>compiler/GHC/Builtin/Types.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="295" style="width: 35px; color: rgba(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">@@ -295,18 +295,14 @@ eqSCSelIdName = mkWiredInIdName gHC_TYPES (fsLit "eq_sel") eqSCSelIdKey eqSCSelI</td>
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<pre style="margin: 0;"> <span id="LC295" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The (~) type operator used in equality constraints (a~b) is considered built-in</span></span>
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<pre style="margin: 0;"> <span id="LC296" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">syntax. This has a few consequences:</span></span>
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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The user is not allowed to define their own type constructors with this name:</span></span>
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<pre style="margin: 0;">-<span id="LC299" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC300" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> ghci> class a ~ b</span></span>
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<pre style="margin: 0;">-<span id="LC301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> <interactive>:1:1: error: Illegal binding of built-in syntax: ~</span></span>
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<pre style="margin: 0;">-<span id="LC302" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* Writing (a ~ b) does not require enabling -XTypeOperators. It does, however,</span></span>
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<pre style="margin: 0;"> <span id="LC299" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> require -XGADTs or -XTypeFamilies.</span></span>
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<pre style="margin: 0;"> <span id="LC300" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC301" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* The (~) type operator is always in scope. It doesn't need to be imported,</span></span>
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<pre style="margin: 0;"> <span id="LC302" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> and it cannot be hidden.</span></span>
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<pre style="margin: 0;"> <span id="LC303" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* We have a bunch of special cases in the compiler to arrange all of the above.</span></span>
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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the past, users also could not define their own (~), but this restriction</span></span>
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<pre style="margin: 0;">+<span id="LC305" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">has been lifted.</span></span>
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<pre style="margin: 0;"> <span id="LC306" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">There's no particular reason for (~) to be special, but fixing this would be a</span></span>
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<pre style="margin: 0;"> <span id="LC308" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">breaking change.</span></span>
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<li id="bf951467d4a9aa443cb109cb4c84a2891945649b">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#bf951467d4a9aa443cb109cb4c84a2891945649b"><strong>compiler/GHC/Parser.y</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">@@ -87,7 +87,7 @@ import GHC.Parser.Errors</td>
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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC88" 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;">unitTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unitDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">tupleDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nilDataCon</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">unboxedUnitTyCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unboxedUnitDataCon</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC90" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">listTyCon_RDR</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">consDataCon_RDR</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">eqTyCon_RDR</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC90" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">listTyCon_RDR</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">consDataCon_RDR</span><span class="idiff left right"> </span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell"><span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC93" class="line" lang="haskell"><span class="o" style="font-weight: 600;">%</span><span class="n" style="color: #333;">expect</span> <span class="mi" style="color: #099;">0</span> <span class="c1" style="color: #998; font-style: italic;">-- shift/reduce conflicts</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">@@ -3517,11 +3517,7 @@ qtyconsym :: { Located RdrName }</td>
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3517
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3517
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<pre style="margin: 0;"> <span id="LC3517" class="line" lang="haskell"></span>
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3518
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<pre style="margin: 0;"> <span id="LC3518" class="line" lang="haskell"><span class="n" style="color: #333;">tyconsym</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span> <span class="p">}</span></span>
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3519
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3519
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<pre style="margin: 0;"> <span id="LC3519" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="kt" style="color: #458; font-weight: 600;">CONSYM</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</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="n" style="color: #333;">mkUnqual</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">getCONSYM</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">}</span></span>
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3520
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<pre style="margin: 0;">-<span id="LC3520" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">VARSYM</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$!</span></span>
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<pre style="margin: 0;">-<span id="LC3521" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [eqTyCon (~) is built-in syntax] in GHC.Builtin.Types</span></span>
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<pre style="margin: 0;">-<span id="LC3522" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">getVARSYM</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"~"</span></span>
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<pre style="margin: 0;">-<span id="LC3523" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">eqTyCon_RDR</span></span>
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<pre style="margin: 0;">-<span id="LC3524" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">mkUnqual</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">getVARSYM</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC3520" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">VARSYM</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">mkUnqual</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">getVARSYM</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC3521" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">':'</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</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="n" style="color: #333;">consDataCon_RDR</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC3522" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'-'</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</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="n" style="color: #333;">mkUnqual</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"-"</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC3523" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="sc" style="color: #d14;">'.'</span> <span class="p">{</span> <span class="n" style="color: #333;">sL1</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="n" style="color: #333;">mkUnqual</span> <span class="n" style="color: #333;">tcClsName</span> <span class="p">(</span><span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"."</span><span class="p">)</span> <span class="p">}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#446cb12ca6cefaf1c6eb79b7db643632744263c7"><strong>compiler/GHC/Parser/PostProcess.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">@@ -121,7 +121,7 @@ import GHC.Utils.Lexeme ( isLexCon )</td>
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<pre style="margin: 0;"> <span id="LC121" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Type</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">TyThing</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">unrestrictedFunTyCon</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Specificity</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC122" 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="n" style="color: #333;">cTupleTyConName</span><span class="p">,</span> <span class="n" style="color: #333;">tupleTyCon</span><span class="p">,</span> <span class="n" style="color: #333;">tupleDataCon</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell"> <span class="n" style="color: #333;">nilDataConName</span><span class="p">,</span> <span class="n" style="color: #333;">nilDataConKey</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC124" class="line" lang="haskell"> <span class="n" style="color: #333;">listTyConName</span><span class="p">,</span> <span class="n" style="color: #333;">listTyConKey</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">eqTyCon_RDR</span></span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC124" class="line" lang="haskell"> <span class="n" style="color: #333;">listTyConName</span><span class="p">,</span> <span class="n" style="color: #333;">listTyConKey</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC125" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.ForeignCall</span></span>
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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.SrcLoc</span></span>
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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types.Unique</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">hasKey</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">@@ -2128,8 +2128,7 @@ checkPrecP (L l (_,i)) (L _ ol)</td>
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<pre style="margin: 0;"> <span id="LC2128" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addFatalError</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Error</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ErrPrecedenceOutOfRange</span> <span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">l</span></span>
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<pre style="margin: 0;"> <span id="LC2129" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC2130" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- If you change this, consider updating Note [Fixity of (->)] in GHC/Types.hs</span></span>
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<pre style="margin: 0;">-<span id="LC2131" class="line" lang="haskell"> <span class="n" style="color: #333;">specialOp</span> <span class="n" style="color: #333;">op</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">op</span> <span class="p">`</span><span class="n" style="color: #333;">elem</span><span class="p">`</span> <span class="p">[</span> <span class="n" style="color: #333;">eqTyCon_RDR</span></span>
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2132
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<pre style="margin: 0;">-<span id="LC2132" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">getRdrName</span> <span class="n" style="color: #333;">unrestrictedFunTyCon</span> <span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC2131" class="line" lang="haskell"> <span class="n" style="color: #333;">specialOp</span> <span class="n" style="color: #333;">op</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">op</span> <span class="p">`</span><span class="n" style="color: #333;">elem</span><span class="p">`</span> <span class="p">[</span> <span class="n" style="color: #333;">getRdrName</span> <span class="n" style="color: #333;">unrestrictedFunTyCon</span> <span class="p">]</span></span>
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2133
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2132
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<pre style="margin: 0;"> <span id="LC2132" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2133" class="line" lang="haskell"><span class="n" style="color: #333;">mkRecConstrOrUpdate</span></span>
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<pre style="margin: 0;"> <span id="LC2134" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span></span>
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<li id="86d694037d496c511e28b2c09c8410f67dc19596">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#86d694037d496c511e28b2c09c8410f67dc19596"><strong>compiler/GHC/Rename/Env.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">@@ -90,6 +90,7 @@ import qualified Data.Semigroup as Semi</td>
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Either</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">partitionEithers</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC91" 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;">find</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">sortBy</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Arrow</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">first</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC93" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Applicative</span> <span class="p">(</span> <span class="p">(</span><span class="o" style="font-weight: 600;"><|></span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Function</span></span>
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<pre style="margin: 0;"> <span id="LC95" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC96" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -963,9 +964,15 @@ lookupTypeOccRn rdr_name</td>
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<pre style="margin: 0;"> <span id="LC964" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">badVarInType</span> <span class="n" style="color: #333;">rdr_name</span></span>
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<pre style="margin: 0;"> <span id="LC965" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>
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966
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<pre style="margin: 0;"> <span id="LC966" 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;">mb_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupOccRn_maybe</span> <span class="n" style="color: #333;">rdr_name</span></span>
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<pre style="margin: 0;">-<span id="LC966" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_name</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">+<span id="LC967" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_name</span> <span class="o" style="font-weight: 600;"><span class="idiff left"><|></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">matchEqTyName</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rdr_name</span></span><span class="idiff right"> </span><span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;"> <span id="LC968" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">name</span></span>
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968
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<pre style="margin: 0;">-<span id="LC968" 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="n" style="color: #333;">lookup_demoted</span> <span class="n" style="color: #333;">rdr_name</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC969" 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="n" style="color: #333;">lookup_demoted</span> <span class="n" style="color: #333;">rdr_name</span> <span class="p">}</span></span>
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970
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<pre style="margin: 0;">+<span id="LC970" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC971" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [eqTyCon (~) is built-in syntax] in GHC.Builtin.Types</span></span>
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972
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<pre style="margin: 0;">+<span id="LC972" class="line" lang="haskell"><span class="n" style="color: #333;">matchEqTyName</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>
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973
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<pre style="margin: 0;">+<span id="LC973" class="line" lang="haskell"><span class="n" style="color: #333;">matchEqTyName</span> <span class="n" style="color: #333;">rdr_name</span></span>
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974
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<pre style="margin: 0;">+<span id="LC974" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">occName</span> <span class="n" style="color: #333;">rdr_name</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">occName</span> <span class="n" style="color: #333;">eqTyCon_RDR</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">eqTyConName</span></span>
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<pre style="margin: 0;">+<span id="LC975" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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969
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976
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<pre style="margin: 0;"> <span id="LC976" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC977" class="line" lang="haskell"><span class="n" style="color: #333;">lookup_demoted</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>
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<pre style="margin: 0;"> <span id="LC978" class="line" lang="haskell"><span class="n" style="color: #333;">lookup_demoted</span> <span class="n" style="color: #333;">rdr_name</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">@@ -1153,8 +1160,9 @@ lookupInfoOccRn rdr_name =</td>
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1160
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<pre style="margin: 0;"> <span id="LC1160" class="line" lang="haskell"> <span class="n" style="color: #333;">lookupExactOrOrig</span> <span class="n" style="color: #333;">rdr_name</span> <span class="p">(</span><span class="o" style="font-weight: 600;">:</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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1154
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1161
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<pre style="margin: 0;"> <span id="LC1161" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">rdr_env</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getGlobalRdrEnv</span></span>
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1155
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1162
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<pre style="margin: 0;"> <span id="LC1162" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">ns</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">gre_name</span> <span class="p">(</span><span class="n" style="color: #333;">lookupGRE_RdrName</span> <span class="n" style="color: #333;">rdr_name</span> <span class="n" style="color: #333;">rdr_env</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC1163" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">eq_ns</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybeToList</span> <span class="p">(</span><span class="n" style="color: #333;">matchEqTyName</span> <span class="n" style="color: #333;">rdr_name</span><span class="p">)</span></span>
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1164
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<pre style="margin: 0;"> <span id="LC1164" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">qual_ns</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupQualifiedNameGHCi</span> <span class="n" style="color: #333;">rdr_name</span></span>
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<pre style="margin: 0;">-<span id="LC1157" 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;">ns</span> <span class="o" style="font-weight: 600;">++</span> <span class="p">(</span><span class="n" style="color: #333;">qual_ns</span> <span class="p">`</span><span class="n" style="color: #333;">minusList</span><span class="p">`</span> <span class="n" style="color: #333;">ns</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC1165" 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;">ns</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;"><span class="idiff left">eq_ns</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">++</span></span><span class="idiff right"> </span><span class="p">(</span><span class="n" style="color: #333;">qual_ns</span> <span class="p">`</span><span class="n" style="color: #333;">minusList</span><span class="p">`</span> <span class="n" style="color: #333;">ns</span><span class="p">))</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC1166" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1167" class="line" lang="haskell"><span class="cd">-- | Like 'lookupOccRn_maybe', but with a more informative result if</span></span>
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<pre style="margin: 0;"> <span id="LC1168" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the 'RdrName' happens to be a record selector:</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">@@ -1655,13 +1663,7 @@ dataTcOccs rdr_name</td>
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<pre style="margin: 0;"> <span id="LC1663" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="n" style="color: #333;">rdr_name</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC1664" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1665" class="line" lang="haskell"> <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rdrNameOcc</span> <span class="n" style="color: #333;">rdr_name</span></span>
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<pre style="margin: 0;">-<span id="LC1658" class="line" lang="haskell"> <span class="n" style="color: #333;">rdr_name_tc</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC1659" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">rdr_name</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC1660" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The (~) type operator is always in scope, so we need a special case</span></span>
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<pre style="margin: 0;">-<span id="LC1661" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- for it here, or else :info (~) fails in GHCi.</span></span>
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<pre style="margin: 0;">-<span id="LC1662" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [eqTyCon (~) is built-in syntax]</span></span>
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<pre style="margin: 0;">-<span id="LC1663" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">occNameFS</span> <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">fsLit</span> <span class="s" style="color: #d14;">"~"</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">eqTyCon_RDR</span></span>
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<pre style="margin: 0;">-<span id="LC1664" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">setRdrNameSpace</span> <span class="n" style="color: #333;">rdr_name</span> <span class="n" style="color: #333;">tcName</span></span>
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<pre style="margin: 0;">+<span id="LC1666" class="line" lang="haskell"> <span class="n" style="color: #333;">rdr_name_tc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">setRdrNameSpace</span> <span class="n" style="color: #333;">rdr_name</span> <span class="n" style="color: #333;">tcName</span></span>
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<pre style="margin: 0;"> <span id="LC1667" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC1668" 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="LC1669" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [dataTcOccs and Exact Names]</span></span>
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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Data.Type.Equality</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * The equality types</span></span>
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<pre style="margin: 0;">-<span id="LC34" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">:~:</span><span class="p">)(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~~</span><span class="p">),</span></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~</span><span class="p">),</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~~</span><span class="p">),</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">:~:</span><span class="p">)(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">:~~:</span><span class="p">)(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Working with equality</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#48a6c03232a2b3f836daeff09b3c6e3790804632"><strong>libraries/base/GHC/Exts.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">@@ -88,6 +88,7 @@ module GHC.Exts</td>
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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">unsafeCoerce</span><span class="o" style="font-weight: 600;">#</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Equality</span></span>
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<pre style="margin: 0;">+<span id="LC91" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC92" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~~</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC93" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC94" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- * Representation polymorphism</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#e1dc7d84d8f2c952dba37b15142001f1d7952318"><strong>libraries/ghc-prim/GHC/Types.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">@@ -32,7 +32,7 @@ module GHC.Types (</td>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">SPEC</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Symbol</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Any</span><span class="p">,</span></span>
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<pre style="margin: 0;">-<span id="LC35" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~~</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">Coercible</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">type</span> <span class="p">(</span><span class="o" style="font-weight: 600;">~</span><span class="p"><span class="idiff left">),</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">type</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff right">~</span>~</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">Coercible</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">TYPE</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">RuntimeRep</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Constraint</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The historical type * should ideally be written as</span></span>
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<pre style="margin: 0;"> <span id="LC38" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- `type *`, without the parentheses. But that's a true</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">@@ -225,7 +225,6 @@ newtype IO a = IO (State# RealWorld -> (# State# RealWorld, a #))</td>
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<pre style="margin: 0;"> <span id="LC225" 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="LC226" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> (~) and Coercible</span></span>
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<pre style="margin: 0;"> <span id="LC227" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC228" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> NB: (~) is built-in syntax, and hence not explicitly exported</span></span>
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<pre style="margin: 0;"> <span id="LC228" 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="LC229" 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="LC230" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#ac1e6a4c6d27ec40915dc871db3b80031880c519"><strong>testsuite/tests/rename/should_compile/T18862.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 PolyKinds, DataKinds, TypeOperators, TypeFamilies #-}</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="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18862</span> <span class="kr" style="font-weight: 600;">where</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;">import</span> <span class="nn" style="color: #555;">Data.Kind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Constraint</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.Type.Equality</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">E</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="n" style="color: #333;">family</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">~</span> <span class="p">(</span><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">result_kind</span></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">~</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="kt" style="color: #458; font-weight: 600;">E</span><span class="o" style="font-weight: 600;">.~</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;">Constraint</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">~</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="kt" style="color: #458; font-weight: 600;">E</span><span class="o" style="font-weight: 600;">.==</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;">Bool</span><span class="p">)</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#a4162a155076487da39ef091cacc50c633652a4d"><strong>testsuite/tests/rename/should_compile/all.T</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -177,3 +177,4 @@ test('T17837', normal, compile, [''])</td>
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18497</span><span class="p">',</span> <span class="o" style="font-weight: 600;">[]</span><span class="p">,</span> <span class="nv" style="color: #008080;">makefile_test</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T18497</span><span class="p">'])</span></span>
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<pre style="margin: 0;"> <span id="LC178" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18264</span><span class="p">',</span> <span class="o" style="font-weight: 600;">[]</span><span class="p">,</span> <span class="nv" style="color: #008080;">makefile_test</span><span class="p">,</span> <span class="p">['</span><span class="s1" style="color: #d14;">T18264</span><span class="p">'])</span></span>
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179
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18302</span><span class="p">',</span> <span class="nv" style="color: #008080;">expect_broken</span><span class="p">(</span><span class="mi" style="color: #099;">18302</span><span class="p">),</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>
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180
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<pre style="margin: 0;">+<span id="LC180" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18862</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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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebeb84bd7d6e76267d6c28144a992d1dfeead8ac#46ddb8dda2edd2df4717a3285e83997fc812a347"><strong>utils/haddock</strong></a>
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<pre style="margin: 0;">-Subproject commit <span class="idiff left right">f7d9e0bb987ca31c3b15cbe63198dafbeee3a3</span>95</pre>
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<pre style="margin: 0;">+Subproject commit <span class="idiff left right">75226997a379981cf2e343e166094887bb3a82</span>95</pre>
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