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<h3>
Danya Rogozin pushed to branch wip/ghc-18740-lookup-update
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/7ecb6e36db73404343462330a9b3873091500275">7ecb6e36</a></strong>
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<span>by Daniel Rogozin</span>
<i>at 2020-09-28T21:00:03+03:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fall back to types when looking up data constructors (#18740)
Before this patch, referring to a data constructor in a term-level
context led to a scoping error:
ghci> id Int
<interactive>:1:4: error: Data constructor not in scope: Int
After this patch, the renamer falls back to the type namespace
and successfully finds the Int. It is then rejected in the type
checker with a more useful error message:
<interactive>:1:4: error:
Type constructor 'Int' used where a value identifier was expected
We also do this for type variables.
</pre>
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<h4>10 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#86d694037d496c511e28b2c09c8410f67dc19596">
compiler/GHC/Rename/Env.hs
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<li class="file-stats">
<a href="#36920f1fa315563c590243b1b096096bc305ca70">
compiler/GHC/Tc/Gen/Head.hs
</a>
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<li class="file-stats">
<a href="#6816c5954a025bb59270f70d0a997e605585d801">
compiler/GHC/Types/Name/Occurrence.hs
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<li class="file-stats">
<a href="#03e77c5a7f093768fb8c3be51f8c4ece06b78463">
compiler/GHC/Types/Name/Reader.hs
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<li class="file-stats">
<a href="#46c37cf0040542d150de200f257a6c2b37dfd278">
<span class="new-file">
+
testsuite/tests/rename/should_fail/T18740a.hs
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<li class="file-stats">
<a href="#305907f56888391e52f28a2e3efca1e5e12e6ba8">
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+
testsuite/tests/rename/should_fail/T18740a.stderr
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<li class="file-stats">
<a href="#020638b3e577e3c13da4a8cb6122e488844cc051">
<span class="new-file">
+
testsuite/tests/rename/should_fail/T18740b.hs
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<li class="file-stats">
<a href="#70d61ede87c171675e261c7655e101a701317290">
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+
testsuite/tests/rename/should_fail/T18740b.stderr
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</li>
<li class="file-stats">
<a href="#c2554d4efde41e6e193f728122336449d2cb5fc5">
testsuite/tests/rename/should_fail/all.T
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<li class="file-stats">
<a href="#46ddb8dda2edd2df4717a3285e83997fc812a347">
utils/haddock
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<h4>Changes:</h4>
<li id="86d694037d496c511e28b2c09c8410f67dc19596">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#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">@@ -5,7 +5,7 @@ GHC.Rename.Env contains functions which convert RdrNames into Names.</td>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC6" 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="LC7" class="line" lang="haskell"></span>
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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, MultiWayIf, NamedFieldPuns #-}</span></span>
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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, MultiWayIf, NamedFieldPuns<span class="idiff left right">, TypeApplications</span> #-}</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;">module</span> <span class="nn" style="color: #555;">GHC.Rename.Env</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">newTopSrcBinder</span><span class="p">,</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1005" 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="1005" 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">@@ -1005,6 +1005,14 @@ lookup_demoted rdr_name</td>
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1005
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1005
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<pre style="margin: 0;"> <span id="LC1005" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"instead of"</span></span>
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1006
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<td class="diff-line-num new_line" data-linenumber="1006" 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">
1006
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<pre style="margin: 0;"> <span id="LC1006" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><></span> <span class="n" style="color: #333;">dot</span> <span class="p">]</span></span>
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1007
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1007
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<pre style="margin: 0;"> <span id="LC1007" class="line" lang="haskell"></span>
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1008
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<pre style="margin: 0;">+<span id="LC1008" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Promotion] below.</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1009" 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="LC1009" class="line" lang="haskell"><span class="n" style="color: #333;">lookup_promoted</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1010" 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">
1010
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<pre style="margin: 0;">+<span id="LC1010" class="line" lang="haskell"><span class="n" style="color: #333;">lookup_promoted</span> <span class="n" style="color: #333;">rdr_name</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1011" 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">
1011
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<pre style="margin: 0;">+<span id="LC1011" class="line" lang="haskell"> <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;">promoted_rdr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">promoteRdrName</span> <span class="n" style="color: #333;">rdr_name</span></span>
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1012
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<pre style="margin: 0;">+<span id="LC1012" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupOccRn_maybe</span> <span class="n" style="color: #333;">promoted_rdr</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1013" 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">
1013
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<pre style="margin: 0;">+<span id="LC1013" 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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1014
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<pre style="margin: 0;">+<span id="LC1014" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1015
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<pre style="margin: 0;">+<span id="LC1015" class="line" lang="haskell"></span>
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1008
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1016
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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell"><span class="n" style="color: #333;">badVarInType</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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1009
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1017
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<pre style="margin: 0;"> <span id="LC1017" class="line" lang="haskell"><span class="n" style="color: #333;">badVarInType</span> <span class="n" style="color: #333;">rdr_name</span></span>
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1010
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1018
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<pre style="margin: 0;"> <span id="LC1018" 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;">addErr</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Illegal promoted term variable in a type:"</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1040" 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>
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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">@@ -1040,6 +1048,23 @@ its namespace to DataName and do a second lookup.</td>
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1040
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1048
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<pre style="margin: 0;"> <span id="LC1048" class="line" lang="haskell"></span>
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1041
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<td class="diff-line-num new_line" data-linenumber="1049" 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">
1049
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<pre style="margin: 0;"> <span id="LC1049" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The final result (after the renamer) will be:</span></span>
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1042
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1050
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<pre style="margin: 0;"> <span id="LC1050" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> HsTyVar ("Zero", DataName)</span></span>
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1051
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<pre style="margin: 0;">+<span id="LC1051" class="line" lang="haskell"></span>
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1052
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<pre style="margin: 0;">+<span id="LC1052" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Promotion]</span></span>
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1053
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<pre style="margin: 0;">+<span id="LC1053" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~</span></span>
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1054
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<pre style="margin: 0;">+<span id="LC1054" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When the user mentions a type constructor or a type variable in a</span></span>
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1055
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<pre style="margin: 0;">+<span id="LC1055" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">term-level context, then we report that a value identifier was expected</span></span>
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1056
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<pre style="margin: 0;">+<span id="LC1056" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">instead of a type-level one. That makes error messages more precise.</span></span>
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1057
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<pre style="margin: 0;">+<span id="LC1057" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Previously, such errors contained only the info that a given value was</span></span>
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1058
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<pre style="margin: 0;">+<span id="LC1058" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">out of scope. We promote the namespace of RdrName and look up after that</span></span>
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1059
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<pre style="margin: 0;">+<span id="LC1059" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(see the functions promotedRdrName and lookup_promoted).</span></span>
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1060
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<pre style="margin: 0;">+<span id="LC1060" class="line" lang="haskell"></span>
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1061
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<pre style="margin: 0;">+<span id="LC1061" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In particular, we have the following error message</span></span>
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1062
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<pre style="margin: 0;">+<span id="LC1062" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> • Type constructor 'Int' used where a value identifier was expected</span></span>
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1063
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<pre style="margin: 0;">+<span id="LC1063" class="line" lang="haskell"></span>
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1064
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<pre style="margin: 0;">+<span id="LC1064" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">when the user writes the following term</span></span>
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1065
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<pre style="margin: 0;">+<span id="LC1065" class="line" lang="haskell"></span>
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1066
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<pre style="margin: 0;">+<span id="LC1066" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> id Int</span></span>
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1067
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<pre style="margin: 0;">+<span id="LC1067" class="line" lang="haskell"></span>
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1043
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1068
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<pre style="margin: 0;"> <span id="LC1068" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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1044
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1069
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<pre style="margin: 0;"> <span id="LC1069" class="line" lang="haskell"></span>
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1045
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1070
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<pre style="margin: 0;"> <span id="LC1070" class="line" lang="haskell"><span class="n" style="color: #333;">lookupOccRnX_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</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="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 class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">r</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1079" 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">@@ -1054,14 +1079,19 @@ lookupOccRn_maybe = lookupOccRnX_maybe lookupGlobalOccRn_maybe id</td>
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1054
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1079
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<pre style="margin: 0;"> <span id="LC1079" class="line" lang="haskell"></span>
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1055
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1080
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<pre style="margin: 0;"> <span id="LC1080" class="line" lang="haskell"><span class="n" style="color: #333;">lookupOccRn_overloaded</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span></span>
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1056
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1081
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<pre style="margin: 0;"> <span id="LC1081" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RnM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Either</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]))</span></span>
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1057
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<pre style="margin: 0;">-<span id="LC1057" class="line" lang="haskell"><span class="n" style="color: #333;">lookupOccRn_overloaded</span> <span class="n" style="color: #333;">overload_ok</span></span>
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1058
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<pre style="margin: 0;">-<span id="LC1058" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupOccRnX_maybe</span> <span class="n" style="color: #333;">global_lookup</span> <span class="kt" style="color: #458; font-weight: 600;">Left</span></span>
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1059
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<pre style="margin: 0;">-<span id="LC1059" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1060
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<pre style="margin: 0;">-<span id="LC1060" class="line" lang="haskell"> <span class="n" style="color: #333;">global_lookup</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Either</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]))</span></span>
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1061
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<pre style="margin: 0;">-<span id="LC1061" class="line" lang="haskell"> <span class="n" style="color: #333;">global_lookup</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span></span>
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1062
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<pre style="margin: 0;">-<span id="LC1062" class="line" lang="haskell"> <span class="n" style="color: #333;">runMaybeT</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">msum</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="o" style="font-weight: 600;">$</span></span>
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1063
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<pre style="margin: 0;">-<span id="LC1063" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">lookupGlobalOccRn_overloaded</span> <span class="n" style="color: #333;">overload_ok</span> <span class="n" style="color: #333;">n</span></span>
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1064
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<pre style="margin: 0;">-<span id="LC1064" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">fmap</span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">listToMaybe</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">lookupQualifiedNameGHCi</span> <span class="n" style="color: #333;">n</span> <span class="p">]</span></span>
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1082
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<pre style="margin: 0;">+<span id="LC1082" class="line" lang="haskell"><span class="n" style="color: #333;">lookupOccRn_overloaded</span> <span class="n" style="color: #333;">overload_ok</span> <span class="n" style="color: #333;">rdr_name</span></span>
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1083
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<pre style="margin: 0;">+<span id="LC1083" 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;">lookupOccRnX_maybe</span> <span class="n" style="color: #333;">global_lookup</span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="n" style="color: #333;">rdr_name</span></span>
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1084
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<pre style="margin: 0;">+<span id="LC1084" 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="LC1085" 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;">fmap</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;">Left</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">lookup_promoted</span> <span class="n" style="color: #333;">rdr_name</span></span>
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1086
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<pre style="margin: 0;">+<span id="LC1086" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Promotion].</span></span>
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1087
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<pre style="margin: 0;">+<span id="LC1087" class="line" lang="haskell"> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">p</span> <span class="p">}</span></span>
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1088
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<pre style="margin: 0;">+<span id="LC1088" class="line" lang="haskell"></span>
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1089
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<pre style="margin: 0;">+<span id="LC1089" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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1090
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<pre style="margin: 0;">+<span id="LC1090" class="line" lang="haskell"> <span class="n" style="color: #333;">global_lookup</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Either</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">]))</span></span>
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1091
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<pre style="margin: 0;">+<span id="LC1091" class="line" lang="haskell"> <span class="n" style="color: #333;">global_lookup</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span></span>
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1092
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<pre style="margin: 0;">+<span id="LC1092" class="line" lang="haskell"> <span class="n" style="color: #333;">runMaybeT</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">msum</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">map</span> <span class="kt" style="color: #458; font-weight: 600;">MaybeT</span> <span class="o" style="font-weight: 600;">$</span></span>
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1093
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<pre style="margin: 0;">+<span id="LC1093" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">lookupGlobalOccRn_overloaded</span> <span class="n" style="color: #333;">overload_ok</span> <span class="n" style="color: #333;">n</span></span>
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1094
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<pre style="margin: 0;">+<span id="LC1094" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">fmap</span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">listToMaybe</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">lookupQualifiedNameGHCi</span> <span class="n" style="color: #333;">n</span> <span class="p">]</span></span>
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1095
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<pre style="margin: 0;"> <span id="LC1095" class="line" lang="haskell"></span>
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1096
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<pre style="margin: 0;"> <span id="LC1096" class="line" lang="haskell"></span>
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1097
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#36920f1fa315563c590243b1b096096bc305ca70"><strong>compiler/GHC/Tc/Gen/Head.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">@@ -768,6 +768,16 @@ tc_infer_id id_name</td>
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<pre style="margin: 0;"> <span id="LC768" 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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769
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769
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<pre style="margin: 0;"> <span id="LC769" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">nonBidirectionalErr</span> <span class="n" style="color: #333;">id_name</span></span>
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770
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<pre style="margin: 0;"> <span id="LC770" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC771" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ATyVar</span> <span class="n" style="color: #333;">name</span> <span class="kr" style="font-weight: 600;">_</span></span>
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<pre style="margin: 0;">+<span id="LC772" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">failWithTc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC773" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Illegal term-level use of the type variable"</span></span>
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774
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<pre style="margin: 0;">+<span id="LC774" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">name</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC775" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC776" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">ATcTyCon</span> <span class="n" style="color: #333;">ty_con</span></span>
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<pre style="margin: 0;">+<span id="LC777" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">failWithTc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;">+<span id="LC778" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Illegal term-level use of the type constructor"</span></span>
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<pre style="margin: 0;">+<span id="LC779" class="line" lang="haskell"> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">quotes</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">tyConName</span> <span class="n" style="color: #333;">ty_con</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC780" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC781" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">failWithTc</span> <span class="o" style="font-weight: 600;">$</span></span>
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<pre style="margin: 0;"> <span id="LC782" class="line" lang="haskell"> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">thing</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"used where a value identifier was expected"</span> <span class="p">}</span></span>
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773
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<pre style="margin: 0;"> <span id="LC783" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</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">@@ -1140,4 +1150,3 @@ addExprCtxt e thing_inside</td>
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1140
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1150
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<pre style="margin: 0;"> <span id="LC1150" class="line" lang="haskell"></span>
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1141
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1151
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<pre style="margin: 0;"> <span id="LC1151" class="line" lang="haskell"><span class="n" style="color: #333;">exprCtxt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsExpr</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;">SDoc</span></span>
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1142
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1152
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<pre style="margin: 0;"> <span id="LC1152" class="line" lang="haskell"><span class="n" style="color: #333;">exprCtxt</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In the expression:"</span><span class="p">)</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">stripParensHsExpr</span> <span class="n" style="color: #333;">expr</span><span class="p">))</span></span></pre>
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<pre style="margin: 0;">-<span id="LC1143" class="line" lang="haskell"></span></pre>
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<li id="6816c5954a025bb59270f70d0a997e605585d801">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#6816c5954a025bb59270f70d0a997e605585d801"><strong>compiler/GHC/Types/Name/Occurrence.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">@@ -52,6 +52,7 @@ module GHC.Types.Name.Occurrence (</td>
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52
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkDFunOcc</span><span class="p">,</span></span>
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53
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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">setOccNameSpace</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">demoteOccName</span><span class="p">,</span></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">promoteOccName</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HasOccName</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="LC57" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Derived 'OccName's</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">@@ -215,6 +216,14 @@ demoteNameSpace DataName = Nothing</td>
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215
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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell"><span class="n" style="color: #333;">demoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">TvName</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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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell"><span class="n" style="color: #333;">demoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">TcClsName</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kt" style="color: #458; font-weight: 600;">DataName</span></span>
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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- promoteNameSpace promotes the NameSpace as follows.</span></span>
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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Promotion] in GHC.Rename.Env</span></span>
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<pre style="margin: 0;">+<span id="LC221" class="line" lang="haskell"><span class="n" style="color: #333;">promoteNameSpace</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NameSpace</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;">NameSpace</span></span>
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<pre style="margin: 0;">+<span id="LC222" class="line" lang="haskell"><span class="n" style="color: #333;">promoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">DataName</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kt" style="color: #458; font-weight: 600;">TcClsName</span></span>
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<pre style="margin: 0;">+<span id="LC223" class="line" lang="haskell"><span class="n" style="color: #333;">promoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">VarName</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kt" style="color: #458; font-weight: 600;">TvName</span></span>
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<pre style="margin: 0;">+<span id="LC224" class="line" lang="haskell"><span class="n" style="color: #333;">promoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">TcClsName</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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<pre style="margin: 0;">+<span id="LC225" class="line" lang="haskell"><span class="n" style="color: #333;">promoteNameSpace</span> <span class="kt" style="color: #458; font-weight: 600;">TvName</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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<pre style="margin: 0;">+<span id="LC226" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC227" 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="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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -336,12 +345,19 @@ mkClsOccFS :: FastString -> OccName</td>
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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell"><span class="n" style="color: #333;">mkClsOccFS</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkOccNameFS</span> <span class="n" style="color: #333;">clsName</span></span>
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<pre style="margin: 0;"> <span id="LC346" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC347" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- demoteOccName lowers the Namespace of OccName.</span></span>
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<pre style="margin: 0;">-<span id="LC339" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">see Note [Demotion]</span></span></span>
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<pre style="margin: 0;">+<span id="LC348" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">See Note [Demotion].</span></span></span>
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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"><span class="n" style="color: #333;">demoteOccName</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</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;">OccName</span></span>
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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"><span class="n" style="color: #333;">demoteOccName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="n" style="color: #333;">space</span> <span class="n" style="color: #333;">name</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC351" class="line" lang="haskell"> <span class="n" style="color: #333;">space'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">demoteNameSpace</span> <span class="n" style="color: #333;">space</span></span>
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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="n" style="color: #333;">space'</span> <span class="n" style="color: #333;">name</span></span>
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<pre style="margin: 0;"> <span id="LC353" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC354" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- promoteOccName promotes the NameSpace of OccName.</span></span>
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<pre style="margin: 0;">+<span id="LC355" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Promotion].</span></span>
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<pre style="margin: 0;">+<span id="LC356" class="line" lang="haskell"><span class="n" style="color: #333;">promoteOccName</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</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;">OccName</span></span>
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<pre style="margin: 0;">+<span id="LC357" class="line" lang="haskell"><span class="n" style="color: #333;">promoteOccName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="n" style="color: #333;">space</span> <span class="n" style="color: #333;">name</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC358" class="line" lang="haskell"> <span class="n" style="color: #333;">space'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">promoteNameSpace</span> <span class="n" style="color: #333;">space</span></span>
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<pre style="margin: 0;">+<span id="LC359" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="n" style="color: #333;">space'</span> <span class="n" style="color: #333;">name</span></span>
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<pre style="margin: 0;">+<span id="LC360" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC361" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Name spaces are related if there is a chance to mean the one when one writes</span></span>
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<pre style="margin: 0;"> <span id="LC362" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the other, i.e. variables <-> data constructors and type variables <-> type constructors</span></span>
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<pre style="margin: 0;"> <span id="LC363" class="line" lang="haskell"><span class="n" style="color: #333;">nameSpacesRelated</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NameSpace</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NameSpace</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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<li id="03e77c5a7f093768fb8c3be51f8c4ece06b78463">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#03e77c5a7f093768fb8c3be51f8c4ece06b78463"><strong>compiler/GHC/Types/Name/Reader.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.Name.Reader (</td>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">nameRdrName</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">getRdrName</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ** Destruction</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;">rdrNameOcc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">rdrNameSpace</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">demoteRdrName</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;">rdrNameOcc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">rdrNameSpace</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">demoteRdrName</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">promoteRdrName</span></span><span class="p"><span class="idiff right">,</span></span></span>
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<pre style="margin: 0;"> <span id="LC36" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isRdrDataCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isRdrTyVar</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isRdrTc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isQual</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isQual_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isUnqual</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">isOrig</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isOrig_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isExact</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isExact_maybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isSrcRdrName</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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -179,13 +179,21 @@ rdrNameSpace :: RdrName -> NameSpace</td>
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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="n" style="color: #333;">rdrNameSpace</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">occNameSpace</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">rdrNameOcc</span></span>
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180
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180
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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"></span>
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181
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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- demoteRdrName lowers the NameSpace of RdrName.</span></span>
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182
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<pre style="margin: 0;">-<span id="LC182" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">see Note [Demotion] in GHC.Types.Name.Occurrence</span></span></span>
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182
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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">See Note [Demotion] in GHC.Rename.Env</span></span></span>
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183
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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">demoteRdrName</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;">RdrName</span></span>
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184
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184
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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"><span class="n" style="color: #333;">demoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="p">(</span><span class="n" style="color: #333;">demoteOccName</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span></span>
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185
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185
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<pre style="margin: 0;"> <span id="LC185" class="line" lang="haskell"><span class="n" style="color: #333;">demoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Qual</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Qual</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">demoteOccName</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span></span>
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186
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186
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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"><span class="n" style="color: #333;">demoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Orig</span> <span class="kr" style="font-weight: 600;">_</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;">Nothing</span></span>
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187
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187
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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"><span class="n" style="color: #333;">demoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Exact</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;">Nothing</span></span>
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188
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188
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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell"></span>
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189
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<pre style="margin: 0;">+<span id="LC189" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- promoteRdrName promotes the NameSpace of RdrName.</span></span>
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190
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<pre style="margin: 0;">+<span id="LC190" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Promotion] in GHC.Rename.Env.</span></span>
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191
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<pre style="margin: 0;">+<span id="LC191" class="line" lang="haskell"><span class="n" style="color: #333;">promoteRdrName</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;">RdrName</span></span>
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192
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<pre style="margin: 0;">+<span id="LC192" class="line" lang="haskell"><span class="n" style="color: #333;">promoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="p">(</span><span class="n" style="color: #333;">promoteOccName</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span></span>
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193
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<pre style="margin: 0;">+<span id="LC193" class="line" lang="haskell"><span class="n" style="color: #333;">promoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Qual</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Qual</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">promoteOccName</span> <span class="n" style="color: #333;">occ</span><span class="p">)</span></span>
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194
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<pre style="margin: 0;">+<span id="LC194" class="line" lang="haskell"><span class="n" style="color: #333;">promoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Orig</span> <span class="kr" style="font-weight: 600;">_</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;">Nothing</span></span>
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195
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<pre style="margin: 0;">+<span id="LC195" class="line" lang="haskell"><span class="n" style="color: #333;">promoteRdrName</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Exact</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;">Nothing</span></span>
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196
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<pre style="margin: 0;">+<span id="LC196" class="line" lang="haskell"></span>
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189
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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- These two are the basic constructors</span></span>
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190
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<pre style="margin: 0;"> <span id="LC198" class="line" lang="haskell"><span class="n" style="color: #333;">mkRdrUnqual</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">OccName</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">RdrName</span></span>
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<pre style="margin: 0;"> <span id="LC199" class="line" lang="haskell"><span class="n" style="color: #333;">mkRdrUnqual</span> <span class="n" style="color: #333;">occ</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Unqual</span> <span class="n" style="color: #333;">occ</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#46c37cf0040542d150de200f257a6c2b37dfd278"><strong>testsuite/tests/rename/should_fail/T18740a.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18740a</span> <span class="kr" style="font-weight: 600;">where</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="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#305907f56888391e52f28a2e3efca1e5e12e6ba8"><strong>testsuite/tests/rename/should_fail/T18740a.stderr</strong></a>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18740a.hs:3:5: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Type constructor ‘Int’ used where a value identifier was expected</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> • In the expression: Int</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> In an equation for ‘x’: x = Int</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#020638b3e577e3c13da4a8cb6122e488844cc051"><strong>testsuite/tests/rename/should_fail/T18740b.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 ScopedTypeVariables #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">T18740b</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Proxy</span></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Proxy</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Proxy</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">a</span></span></pre>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="plaintext">T18740b.hs:6:24: error:</span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="plaintext"> • Illegal term-level use of the type variable ‘a’</span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="plaintext"> • In the expression: a</span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="plaintext"> In an equation for ‘f’: f (Proxy :: Proxy a) = a</span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#c2554d4efde41e6e193f728122336449d2cb5fc5"><strong>testsuite/tests/rename/should_fail/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">@@ -156,3 +156,5 @@ test('T17593', normal, compile_fail, [''])</td>
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156
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<pre style="margin: 0;"> <span id="LC156" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18145</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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157
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157
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<pre style="margin: 0;"> <span id="LC157" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18240a</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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158
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158
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<pre style="margin: 0;"> <span id="LC158" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18240b</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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159
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<pre style="margin: 0;">+<span id="LC159" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18740a</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span>
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160
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<pre style="margin: 0;">+<span id="LC160" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T18740b</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_fail</span><span class="p">,</span> <span class="p">[''])</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7ecb6e36db73404343462330a9b3873091500275#46ddb8dda2edd2df4717a3285e83997fc812a347"><strong>utils/haddock</strong></a>
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<pre style="margin: 0;">-Subproject commit <span class="idiff left right">8c8517d6c82411212452c3c5fca503c7af5ac3da</span></pre>
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<pre style="margin: 0;">+Subproject commit <span class="idiff left right">2a15172bde75ec151a52fef586d1e362d478aae8</span></pre>
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