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<h3>
Shayne Fletcher pushed to branch wip/T18599
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/b3ec6df1e9a337b413756e3485cd94c5af9bdfda">b3ec6df1</a></strong>
<div>
<span>by Shayne Fletcher</span>
<i>at 2020-10-10T17:51:08-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Have the parser construct GetField syntax
rnExpr (GetField {...}) calculates a GetField, tcExpr returns the
enclosed typed getField function.
</pre>
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<h4>6 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#cc97d81e7223ad4a3a5e801156ca632f9fa75654">
compiler/GHC/Hs/Expr.hs
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<li class="file-stats">
<a href="#649144a78135a23cabfc90dd83c4aabf448eb6ab">
compiler/GHC/Iface/Ext/Ast.hs
</a>
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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="#b47ece2bbb8303a5792c2fdc52394c8ed336e8a2">
compiler/GHC/Rename/Expr.hs
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<li class="file-stats">
<a href="#902811828741e6bcd64702935bbb54edbbd070ef">
compiler/GHC/Tc/Gen/Expr.hs
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<h4>Changes:</h4>
<li id="cc97d81e7223ad4a3a5e801156ca632f9fa75654">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#cc97d81e7223ad4a3a5e801156ca632f9fa75654"><strong>compiler/GHC/Hs/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -668,7 +668,7 @@ type instance XRecordUpd GhcTc = RecordUpdTc</td>
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668
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668
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<pre style="margin: 0;"> <span id="LC668" class="line" lang="haskell"></span>
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669
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669
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<pre style="margin: 0;"> <span id="LC669" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XGetField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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670
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670
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<pre style="margin: 0;"> <span id="LC670" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XGetField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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671
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<pre style="margin: 0;">-<span id="LC671" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XGetField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">GetFieldTc</span></span></span>
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671
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<pre style="margin: 0;">+<span id="LC671" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XGetField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">NoExtField</span></span></span>
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672
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672
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<pre style="margin: 0;"> <span id="LC672" class="line" lang="haskell"></span>
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673
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673
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<pre style="margin: 0;"> <span id="LC673" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">XExprWithTySig</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GhcPass</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NoExtField</span></span>
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<pre style="margin: 0;"> <span id="LC674" class="line" lang="haskell"></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#649144a78135a23cabfc90dd83c4aabf448eb6ab"><strong>compiler/GHC/Iface/Ext/Ast.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">@@ -1162,6 +1162,9 @@ instance HiePass p => ToHie (Located (HsExpr (GhcPass p))) where</td>
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1162
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1162
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<pre style="margin: 0;"> <span id="LC1162" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">HsSpliceE</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">-></span></span>
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1163
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<pre style="margin: 0;"> <span id="LC1163" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">toHie</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">mspan</span> <span class="n" style="color: #333;">x</span></span>
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1164
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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>
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<pre style="margin: 0;">+<span id="LC1165" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">GetField</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">expr</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">+<span id="LC1166" class="line" lang="haskell"> <span class="p">[</span> <span class="n" style="color: #333;">toHie</span> <span class="n" style="color: #333;">expr</span></span>
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1167
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<pre style="margin: 0;">+<span id="LC1167" class="line" lang="haskell"> <span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC1168" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">XExpr</span> <span class="n" style="color: #333;">x</span></span>
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1166
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1169
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<pre style="margin: 0;"> <span id="LC1169" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ghcPass</span> <span class="o" style="font-weight: 600;">@</span><span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;"> <span id="LC1170" class="line" lang="haskell"> <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">WrapExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsWrap</span> <span class="n" style="color: #333;">w</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;">x</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#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">@@ -2625,8 +2625,8 @@ fexp :: { ECP }</td>
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<pre style="margin: 0;"> <span id="LC2625" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- a projection 'r.a' (say) then we want the parse</span></span>
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<pre style="margin: 0;"> <span id="LC2626" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- '(r.a).b'.</span></span>
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<pre style="margin: 0;"> <span id="LC2627" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">ecpFromExp</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC2628" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">isGet</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">f</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">f</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">mkApp</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mkGet</span></span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span></span>
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<pre style="margin: 0;">-<span id="LC2629" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkGet</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span></span>
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<pre style="margin: 0;">+<span id="LC2628" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">isGet<span class="idiff left">Field</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">f</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">f</span></span><span class="idiff"> </span><span class="p"><span class="idiff">`</span></span><span class="n" style="color: #333;"><span class="idiff">mkApp</span></span><span class="p"><span class="idiff">`</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkGetField</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">comb2</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="mi" style="color: #099;"><span class="idiff">3</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span></span>
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<pre style="margin: 0;">+<span id="LC2629" 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;">mkGet<span class="idiff left">Field</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">comb2</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="mi" style="color: #099;"><span class="idiff">1</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$></span></span><span class="p"><span class="idiff right">)</span></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="mi" style="color: #099;">3</span></span>
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<pre style="margin: 0;"> <span id="LC2630" class="line" lang="haskell"> <span class="p">}}</span></span>
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<pre style="margin: 0;"> <span id="LC2631" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2632" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">aexp</span> <span class="p">{</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p">}</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#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">@@ -19,7 +19,7 @@</td>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -Wno-incomplete-record-updates #-}</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.Parser.PostProcess</span> <span class="p">(</span></span>
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<pre style="margin: 0;">-<span id="LC22" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkApp</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkGet</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">mkVar</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkFieldUpdater</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkProj</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">isGet</span></span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">applyFieldUpdates</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="c1" style="color: #998; font-style: italic;">-- RecordDot</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkApp</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkGet<span class="idiff left">Field</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkVar</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkFieldUpdater</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">mkProj</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">isGetField</span></span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">applyFieldUpdates</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="c1" style="color: #998; font-style: italic;">-- RecordDot</span></span>
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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkHsOpApp</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkHsIntegral</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkHsFractional</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkHsIsString</span><span class="p">,</span></span>
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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"> <span class="nf" style="color: #900; font-weight: 600;">mkHsDo</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkSpliceDecl</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">@@ -2967,9 +2967,9 @@ get_field = mkVar "getField"</td>
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<pre style="margin: 0;"> <span id="LC2967" class="line" lang="haskell"><span class="n" style="color: #333;">set_field</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkVar</span> <span class="s" style="color: #d14;">"setField"</span></span>
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<pre style="margin: 0;"> <span id="LC2968" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2969" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Test if the expression is a 'getField @"..."' expression.</span></span>
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<pre style="margin: 0;">-<span id="LC2970" class="line" lang="haskell"><span class="n" style="color: #333;">isGet</span> <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 class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC2971" class="line" lang="haskell"><span class="n" style="color: #333;">isGet</span><span class="idiff left"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">HsAppType</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">HsVar</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">name</span></span><span class="p"><span class="idiff">)))</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">occNameString</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">rdrNameOcc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">name</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">==</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"getField"</span></span></span>
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<pre style="margin: 0;">-<span id="LC2972" class="line" lang="haskell"><span class="n" style="color: #333;">isGet</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">+<span id="LC2970" class="line" lang="haskell"><span class="n" style="color: #333;">isGet<span class="idiff left right">Field</span></span> <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 class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">+<span id="LC2971" class="line" lang="haskell"><span class="n" style="color: #333;">isGet<span class="idiff left">Field</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">L</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">GetField</span></span><span class="p"><span class="idiff">{})</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">True</span></span></span>
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<pre style="margin: 0;">+<span id="LC2972" class="line" lang="haskell"><span class="n" style="color: #333;">isGet<span class="idiff left right">Field</span></span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;"> <span id="LC2973" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2974" class="line" lang="haskell"><span class="n" style="color: #333;">zPat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LPat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span></span>
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<pre style="margin: 0;"> <span id="LC2975" class="line" lang="haskell"><span class="n" style="color: #333;">zVar</span><span class="p">,</span> <span class="n" style="color: #333;">circ</span> <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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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2997,6 +2997,15 @@ mkGet' :: [LHsExpr GhcPs] -> Located FastString -> [LHsExpr GhcPs]</td>
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<pre style="margin: 0;"> <span id="LC2997" class="line" lang="haskell"><span class="n" style="color: #333;">mkGet'</span> <span class="n" style="color: #333;">l</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">fIELD</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">get_field</span> <span class="p">`</span><span class="n" style="color: #333;">mkAppType</span><span class="p">`</span> <span class="n" style="color: #333;">mkSelector</span> <span class="n" style="color: #333;">fIELD</span> <span class="p">`</span><span class="n" style="color: #333;">mkApp</span><span class="p">`</span> <span class="n" style="color: #333;">mkParen</span> <span class="n" style="color: #333;">r</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">l</span></span>
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2998
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<pre style="margin: 0;"> <span id="LC2998" class="line" lang="haskell"><span class="n" style="color: #333;">mkGet'</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"mkGet' : The impossible has happened!"</span></span>
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2999
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2999
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<pre style="margin: 0;"> <span id="LC2999" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3000" class="line" lang="haskell"><span class="n" style="color: #333;">mkGetField</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SrcSpan</span> <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 class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">FastString</span> <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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<pre style="margin: 0;">+<span id="LC3001" class="line" lang="haskell"><span class="n" style="color: #333;">mkGetField</span> <span class="n" style="color: #333;">loc</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">fIELD</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC3002" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">loc</span> <span class="kt" style="color: #458; font-weight: 600;">GetField</span> <span class="p">{</span></span>
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3003
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<pre style="margin: 0;">+<span id="LC3003" class="line" lang="haskell"> <span class="n" style="color: #333;">gf_ext</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">noExtField</span></span>
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3004
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<pre style="margin: 0;">+<span id="LC3004" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">gf_expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arg</span></span>
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<pre style="margin: 0;">+<span id="LC3005" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">gf_fIELD</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fIELD</span></span>
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<pre style="margin: 0;">+<span id="LC3006" class="line" lang="haskell"> <span class="p">,</span> <span class="n" style="color: #333;">gf_getField</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkGet</span> <span class="n" style="color: #333;">arg</span> <span class="n" style="color: #333;">fIELD</span></span>
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<pre style="margin: 0;">+<span id="LC3007" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC3008" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC3009" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- mkSet a fIELD b calculates a set_field @fIELD expression.</span></span>
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<pre style="margin: 0;"> <span id="LC3010" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- e.g mkSet a fIELD b = set_field @"fIELD" a b (read as "set field 'fIELD' on a to b").</span></span>
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<pre style="margin: 0;"> <span id="LC3011" class="line" lang="haskell"><span class="n" style="color: #333;">mkSet</span> <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 class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">FastString</span> <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 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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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#b47ece2bbb8303a5792c2fdc52394c8ed336e8a2"><strong>compiler/GHC/Rename/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -210,6 +210,14 @@ rnExpr (NegApp _ e _)</td>
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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">final_e</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkNegAppRn</span> <span class="n" style="color: #333;">e'</span> <span class="n" style="color: #333;">neg_name</span></span>
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<pre style="margin: 0;"> <span id="LC211" 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;">final_e</span><span class="p">,</span> <span class="n" style="color: #333;">fv_e</span> <span class="p">`</span><span class="n" style="color: #333;">plusFV</span><span class="p">`</span> <span class="n" style="color: #333;">fv_neg</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC212" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC213" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------</span></span>
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<pre style="margin: 0;">+<span id="LC214" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Record dot syntax</span></span>
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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell"><span class="n" style="color: #333;">rnExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GetField</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC216" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">e'</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rnLExpr</span> <span class="n" style="color: #333;">e</span></span>
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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell"> <span class="p">;</span> <span class="p">(</span><span class="n" style="color: #333;">g'</span><span class="p">,</span> <span class="n" style="color: #333;">fv</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">rnLExpr</span> <span class="n" style="color: #333;">g</span></span>
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218
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<pre style="margin: 0;">+<span id="LC218" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GetField</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e'</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">g'</span><span class="p">,</span> <span class="n" style="color: #333;">fv</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell"></span>
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221
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<pre style="margin: 0;"> <span id="LC221" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------------</span></span>
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222
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<pre style="margin: 0;"> <span id="LC222" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Template Haskell extensions</span></span>
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215
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223
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<pre style="margin: 0;"> <span id="LC223" class="line" lang="haskell"><span class="n" style="color: #333;">rnExpr</span> <span class="n" style="color: #333;">e</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsBracket</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">br_body</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rnBracket</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">br_body</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b3ec6df1e9a337b413756e3485cd94c5af9bdfda#902811828741e6bcd64702935bbb54edbbd070ef"><strong>compiler/GHC/Tc/Gen/Expr.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1029,6 +1029,15 @@ tcExpr e@(HsRecFld _ f) res_ty</td>
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1029
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1029
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<pre style="margin: 0;"> <span id="LC1029" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ArithSeq</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">witness</span> <span class="n" style="color: #333;">seq</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>
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1030
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1030
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<pre style="margin: 0;"> <span id="LC1030" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcArithSeq</span> <span class="n" style="color: #333;">witness</span> <span class="n" style="color: #333;">seq</span> <span class="n" style="color: #333;">res_ty</span></span>
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1031
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1031
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<pre style="margin: 0;"> <span id="LC1031" class="line" lang="haskell"></span>
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1032
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<pre style="margin: 0;">+<span id="LC1032" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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1033
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<pre style="margin: 0;">+<span id="LC1033" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1034
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<pre style="margin: 0;">+<span id="LC1034" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1035
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<pre style="margin: 0;">+<span id="LC1035" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Record dot syntax</span></span>
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1036
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<pre style="margin: 0;">+<span id="LC1036" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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1037
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<pre style="margin: 0;">+<span id="LC1037" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1038
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<pre style="margin: 0;">+<span id="LC1038" 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="LC1039" class="line" lang="haskell"><span class="n" style="color: #333;">tcExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GetField</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">g</span><span class="p">))</span> <span class="n" style="color: #333;">res_ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcExpr</span> <span class="n" style="color: #333;">g</span> <span class="n" style="color: #333;">res_ty</span></span>
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1040
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<pre style="margin: 0;">+<span id="LC1040" class="line" lang="haskell"></span>
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1032
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1041
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<pre style="margin: 0;"> <span id="LC1041" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>
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1033
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1042
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<pre style="margin: 0;"> <span id="LC1042" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>
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1034
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1043
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<pre style="margin: 0;"> <span id="LC1043" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">* *</span></span>
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