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<h3>
Shayne Fletcher pushed to branch wip/T18599-split-construct
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dde48b77356c548c6d625344946725f02e8518a6">dde48b77</a></strong>
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<span>by Shayne Fletcher</span>
<i>at 2020-09-07T18:03:59-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Merge pbinds into fbinds
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<h4>3 changed files:</h4>
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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="#9d8021babc748739661d89c9cce5e569145bf14b">
record-dot-syntax-tests/Test.hs
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<h4>Changes:</h4>
<li id="bf951467d4a9aa443cb109cb4c84a2891945649b">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dde48b77356c548c6d625344946725f02e8518a6#bf951467d4a9aa443cb109cb4c84a2891945649b"><strong>compiler/GHC/Parser.y</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2723" 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">@@ -2723,7 +2723,6 @@ aexp1 :: { ECP }</td>
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2723
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<pre style="margin: 0;"> <span id="LC2723" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="o" style="font-weight: 600;">-></span></span>
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2724
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<pre style="margin: 0;"> <span id="LC2724" class="line" lang="haskell"> <span class="n" style="color: #333;">amms</span> <span class="p">(</span><span class="n" style="color: #333;">mkHsRecordPV</span> <span class="n" style="color: #333;">dot</span> <span class="p">(</span><span class="n" style="color: #333;">comb2</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="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">comb2</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">4</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p">(</span><span class="n" style="color: #333;">snd</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">))</span></span>
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2725
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<pre style="margin: 0;"> <span id="LC2725" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">moc</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">mcc</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">4</span><span class="o" style="font-weight: 600;">:</span><span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">))</span> <span class="p">}</span></span>
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<td class="diff-line-num old old_line" data-linenumber="2726" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
2726
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<pre style="margin: 0;">-<span id="LC2726" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">aexp1</span> <span class="sc" style="color: #d14;">'{'</span> <span class="n" style="color: #333;">pbinds</span> <span class="sc" style="color: #d14;">'}'</span> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">runPV</span> <span class="p">(</span><span class="n" style="color: #333;">unECP</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">ecpFromExp</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">applyFieldUpdates</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 class="p">}</span></span>
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2727
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<pre style="margin: 0;"> <span id="LC2726" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">aexp2</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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2728
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2727
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<pre style="margin: 0;"> <span id="LC2727" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2728" class="line" lang="haskell"><span class="n" style="color: #333;">aexp2</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="kt" style="color: #458; font-weight: 600;">ECP</span> <span class="p">}</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="3231" 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="3230" 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">@@ -3231,7 +3230,7 @@ fbinds1 :: { forall b. DisambECP b => PV ([AddAnn],([Fbind b], Maybe SrcSpan)) }</td>
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3231
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<pre style="margin: 0;"> <span id="LC3230" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">fbind</span> <span class="sc" style="color: #d14;">','</span> <span class="n" style="color: #333;">fbinds1</span></span>
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<pre style="margin: 0;"> <span id="LC3231" class="line" lang="haskell"> <span class="p">{</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="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">-></span></span>
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3233
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<pre style="margin: 0;"> <span id="LC3232" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="o" style="font-weight: 600;">-></span></span>
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3234
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<pre style="margin: 0;">-<span id="LC3234" class="line" lang="haskell"> <span class="n" style="color: #333;">addAnnotation</span> <span class="p">(</span><span class="n" style="color: #333;">gl</span> <span class="p">(</span><span class="n" style="color: #333;">fbindToRecField</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">))</span> <span class="kt" style="color: #458; font-weight: 600;">AnnComma</span> <span class="p">(</span><span class="n" style="color: #333;">gl</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">>></span></span>
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<pre style="margin: 0;">+<span id="LC3233" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- </span>addAnnotation (gl (fbindToRecField $1)) AnnComma (gl $2) >></span></span>
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3235
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<pre style="margin: 0;"> <span id="LC3234" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">case</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="kr" style="font-weight: 600;">of</span> <span class="p">(</span><span class="n" style="color: #333;">ma</span><span class="p">,(</span><span class="n" style="color: #333;">flds</span><span class="p">,</span> <span class="n" style="color: #333;">dd</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">ma</span><span class="p">,(</span><span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">flds</span><span class="p">,</span> <span class="n" style="color: #333;">dd</span><span class="p">)))</span> <span class="p">}</span></span>
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3236
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<pre style="margin: 0;"> <span id="LC3235" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">fbind</span> <span class="p">{</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">-></span></span>
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3237
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3236
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<pre style="margin: 0;"> <span id="LC3236" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,([</span><span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span><span class="p">))</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">@@ -3253,42 +3252,30 @@ fbind :: { forall b. DisambECP b => PV (Fbind b) }</td>
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3253
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3252
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<pre style="margin: 0;"> <span id="LC3252" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- In the punning case, use a place-holder</span></span>
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3254
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3253
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<pre style="margin: 0;"> <span id="LC3253" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- The renamer fills in the final value</span></span>
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3255
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3254
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<pre style="margin: 0;"> <span id="LC3254" class="line" lang="haskell"></span>
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3256
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<pre style="margin: 0;">-<span id="LC3256" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------------------------------------</span></span>
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3257
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<pre style="margin: 0;">-<span id="LC3257" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Nested updates (strictly expressions; patterns do not participate in updates).</span></span>
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3258
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<pre style="margin: 0;">-<span id="LC3258" class="line" lang="haskell"></span>
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3259
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<pre style="margin: 0;">-<span id="LC3259" class="line" lang="haskell"><span class="n" style="color: #333;">pbinds</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="p">[</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 class="p">]</span> <span class="p">}</span></span>
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3260
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<pre style="margin: 0;">-<span id="LC3260" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">pbinds1</span> <span class="p">{</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p">}</span></span>
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3261
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<pre style="margin: 0;">-<span id="LC3261" class="line" lang="haskell"></span>
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3262
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<pre style="margin: 0;">-<span id="LC3262" class="line" lang="haskell"><span class="n" style="color: #333;">pbinds1</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">]</span> <span class="p">}</span></span>
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3263
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<pre style="margin: 0;">-<span id="LC3263" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">pbind</span> <span class="sc" style="color: #d14;">','</span> <span class="n" style="color: #333;">pbinds1</span> <span class="p">{</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="p">}</span></span>
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3264
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<pre style="margin: 0;">-<span id="LC3264" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">pbind</span> <span class="p">{</span> <span class="p">[</span><span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">]</span> <span class="p">}</span></span>
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3265
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<pre style="margin: 0;">-<span id="LC3265" class="line" lang="haskell"></span>
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3266
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<pre style="margin: 0;">-<span id="LC3266" class="line" lang="haskell"><span class="n" style="color: #333;">pbind</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</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 class="p">}</span></span>
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3267
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3255
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<pre style="margin: 0;"> <span id="LC3255" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Whitespace-sensitive operator parsing] in Lexer.x</span></span>
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3268
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<pre style="margin: 0;">-<span id="LC3268" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">field</span> <span class="kt" style="color: #458; font-weight: 600;">TIGHT_INFIX_PROJ</span> <span class="n" style="color: #333;">fieldToUpdate</span> <span class="sc" style="color: #d14;">'='</span> <span class="n" style="color: #333;">texp</span></span>
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3269
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<pre style="margin: 0;">-<span id="LC3269" class="line" lang="haskell"> <span class="p">{</span><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="kr" style="font-weight: 600;">let</span> <span class="p">{</span> <span class="n" style="color: #333;">top</span> <span class="o" style="font-weight: 600;">=</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="c1" style="color: #998; font-style: italic;">-- foo</span></span>
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3270
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<pre style="margin: 0;">-<span id="LC3270" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">fields</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">top</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">reverse</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="c1" style="color: #998; font-style: italic;">-- [foo, bar, baz, quux]</span></span>
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3271
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<pre style="margin: 0;">-<span id="LC3271" class="line" lang="haskell"> <span class="p">}</span></span>
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3272
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<td class="diff-line-num new_line old" data-linenumber="3256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3272" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">runPV</span> <span class="p">(</span><span class="n" style="color: #333;">unECP</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">5</span><span class="p">)</span></span>
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3273
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<pre style="margin: 0;">-<span id="LC3273" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkFieldUpdater</span> <span class="n" style="color: #333;">fields</span> <span class="n" style="color: #333;">arg</span></span>
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3274
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<td class="diff-line-num new_line old" data-linenumber="3256" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3274" class="line" lang="haskell"> <span class="p">}}</span></span>
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<td class="diff-line-num new new_line" data-linenumber="3256" 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">
3256
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<pre style="margin: 0;">+<span id="LC3256" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">field</span> <span class="kt" style="color: #458; font-weight: 600;">TIGHT_INFIX_PROJ</span> <span class="n" style="color: #333;">fieldToUpdate</span> <span class="sc" style="color: #d14;">'='</span> <span class="n" style="color: #333;">texp</span></span>
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<td class="diff-line-num new new_line" data-linenumber="3257" 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">
3257
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<pre style="margin: 0;">+<span id="LC3257" class="line" lang="haskell"> <span class="p">{</span> <span class="n" style="color: #333;">unECP</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">5</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">5</span> <span class="o" style="font-weight: 600;">-></span></span>
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<td class="diff-line-num new new_line" data-linenumber="3258" 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">
3258
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<pre style="margin: 0;">+<span id="LC3258" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsFieldUpdaterPV</span> <span class="p">(</span><span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">reverse</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">5</span> <span class="o" style="font-weight: 600;">>>=</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">up</span> <span class="o" style="font-weight: 600;">-></span></span>
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<td class="diff-line-num new new_line" data-linenumber="3259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
3259
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<pre style="margin: 0;">+<span id="LC3259" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Pbind</span> <span class="n" style="color: #333;">up</span></span>
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<td class="diff-line-num new new_line" data-linenumber="3260" 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">
3260
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<pre style="margin: 0;">+<span id="LC3260" class="line" lang="haskell"> <span class="p">}</span></span>
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3261
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<pre style="margin: 0;">+<span id="LC3261" class="line" lang="haskell"></span>
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3275
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3262
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<pre style="margin: 0;"> <span id="LC3262" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See Note [Whitespace-sensitive operator parsing] in Lexer.x</span></span>
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3276
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3276" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">field</span> <span class="kt" style="color: #458; font-weight: 600;">TIGHT_INFIX_PROJ</span> <span class="n" style="color: #333;">fieldToUpdate</span></span>
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3277
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<pre style="margin: 0;">-<span id="LC3277" class="line" lang="haskell"> <span class="p"><span class="idiff left">{</span></span><span class="o" style="font-weight: 600;"><span class="idiff">%</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">do</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">recordPuns</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">getBit</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">RecordPunsBit</span></span></span>
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3278
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3278" class="line" lang="haskell"> <span class="p"><span class="idiff left">;</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">if</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">not</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">recordPuns</span></span></span>
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3279
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3279" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left">then</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">do</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{</span></span></span>
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3280
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3280" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">addFatalError</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">noSrcSpan</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>
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<td class="diff-line-num old old_line" data-linenumber="3281" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
3281
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3281" class="line" lang="haskell"> <span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"For this to work, enable NamedFieldPuns."</span></span></span>
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3282
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3282" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff right">}</span></span></span>
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3283
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3283" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left">else</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">do</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{</span></span></span>
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<td class="diff-line-num old old_line" data-linenumber="3284" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
3284
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3284" class="line" lang="haskell"> <span class="p"><span class="idiff left">;</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">let</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">top</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</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="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- foo</span></span></span>
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3285
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<pre style="margin: 0;">-<span id="LC3285" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</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">top</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">reverse</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="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- [foo, bar, baz, quux]</span></span></span>
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3286
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3286" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">final</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">last</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- quux</span></span></span>
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3287
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<pre style="margin: 0;">-<span id="LC3287" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</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="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkVar</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">unpackFS</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">unLoc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">final</span></span><span class="p"><span class="idiff right">)</span></span></span>
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3288
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3288" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff right">}</span></span></span>
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3289
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<td class="diff-line-num new_line old" data-linenumber="3263" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC3289" class="line" lang="haskell"> <span class="p"><span class="idiff left">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">return</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">mkFieldUpdater</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">arg</span></span></span>
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3290
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<pre style="margin: 0;">-<span id="LC3290" class="line" lang="haskell"> <span class="p"><span class="idiff left right">}</span></span></span>
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3291
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<pre style="margin: 0;">-<span id="LC3291" class="line" lang="haskell"> <span class="p"><span class="idiff left right">}</span>}</span></span>
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3263
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<pre style="margin: 0;">+<span id="LC3263" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">field</span> <span class="kt" style="color: #458; font-weight: 600;">TIGHT_INFIX_PROJ</span> <span class="n" style="color: #333;">fieldToUpdate</span></span>
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3264
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<pre style="margin: 0;">+<span id="LC3264" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">let</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">top</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</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 right">1</span></span></span>
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3265
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<pre style="margin: 0;">+<span id="LC3265" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</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">top</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">reverse</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 right">3</span></span></span>
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3266
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<pre style="margin: 0;">+<span id="LC3266" class="line" lang="haskell"> <span class="idiff left"> </span><span class="p"><span class="idiff">;</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">final</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">last</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span></span>
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<td class="diff-line-num new new_line" data-linenumber="3267" 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">
3267
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<pre style="margin: 0;">+<span id="LC3267" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left right">in</span></span></span>
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<td class="diff-line-num new new_line" data-linenumber="3268" 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">
3268
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<pre style="margin: 0;">+<span id="LC3268" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">getBit</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">RecordPunsBit</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">>>=</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">puns</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span></span>
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3269
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<pre style="margin: 0;">+<span id="LC3269" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left">if</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">puns</span></span></span>
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3270
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<pre style="margin: 0;">+<span id="LC3270" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left right">then</span></span></span>
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3271
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<pre style="margin: 0;">+<span id="LC3271" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left">let</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="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mkRdrUnqual</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">mkVarOcc</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">unpackFS</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">unLoc</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">final</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">in</span></span></span>
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3272
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<pre style="margin: 0;">+<span id="LC3272" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">mkHsVarPV</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">noLoc</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">arg</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="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span></span>
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3273
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<pre style="margin: 0;">+<span id="LC3273" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">mkHsFieldUpdaterPV</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fields</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">>>=</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">up</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span></span>
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3274
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<pre style="margin: 0;">+<span id="LC3274" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">return</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Pbind</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">up</span></span></span>
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3275
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<pre style="margin: 0;">+<span id="LC3275" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;"><span class="idiff left right">else</span></span></span>
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3276
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<pre style="margin: 0;">+<span id="LC3276" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">addFatalError</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">noSrcSpan</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>
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3277
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<pre style="margin: 0;">+<span id="LC3277" class="line" lang="haskell"> <span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"For this to work, enable NamedFieldPuns."</span></span></span>
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3278
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<pre style="margin: 0;">+<span id="LC3278" class="line" lang="haskell"> <span class="idiff left right"> </span><span class="p">}</span></span>
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3279
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<pre style="margin: 0;"> <span id="LC3279" class="line" lang="haskell"></span>
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3293
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3280
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<pre style="margin: 0;"> <span id="LC3280" class="line" lang="haskell"><span class="n" style="color: #333;">fieldToUpdate</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">{</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">FastString</span><span class="p">]</span> <span class="p">}</span></span>
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3281
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<pre style="margin: 0;"> <span id="LC3281" class="line" lang="haskell"><span class="n" style="color: #333;">fieldToUpdate</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dde48b77356c548c6d625344946725f02e8518a6#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">@@ -153,7 +153,7 @@ import Data.Kind ( Type )</td>
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<pre style="margin: 0;"> <span id="LC153" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"HsVersions.h"</span></span>
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154
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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC156" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsRecField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">))</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Pbind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L<span class="idiff left">HsExpr</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">GhcPs</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">LHsExpr</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">GhcPs</span></span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC156" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsRecField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">))</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Pbind</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L<span class="idiff left">ocated</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">b</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">Located</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">b</span></span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell"><span class="n" style="color: #333;">fbindToRecField</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Fbind</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsRecField</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</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="haskell"><span class="n" style="color: #333;">fbindToRecField</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Fbind</span> <span class="n" style="color: #333;">f</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">f</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1392" 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="1392" 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">@@ -1392,6 +1392,8 @@ class b ~ (Body b) GhcPs => DisambECP b where</td>
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1392
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<pre style="margin: 0;"> <span id="LC1392" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromCmd'</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsCmd</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;">PV</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1393
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1393
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<pre style="margin: 0;"> <span id="LC1393" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Return an expression without ambiguity, or fail in a non-expression context.</span></span>
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1394
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1394
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<pre style="margin: 0;"> <span id="LC1394" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromExp'</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;">PV</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1395
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<pre style="margin: 0;">+<span id="LC1395" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | This can only be satified by expressions.</span></span>
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1396
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<pre style="margin: 0;">+<span id="LC1396" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsFieldUpdaterPV</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="kt" style="color: #458; font-weight: 600;">FastString</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PV</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1395
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<td class="diff-line-num new_line" data-linenumber="1397" 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">
1397
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<pre style="margin: 0;"> <span id="LC1397" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Disambiguate "\... -> ..." (lambda)</span></span>
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1396
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1398
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<pre style="margin: 0;"> <span id="LC1398" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLamPV</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;">MatchGroup</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PV</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Located</span> <span class="n" style="color: #333;">b</span><span class="p">)</span></span>
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1397
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1399
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<pre style="margin: 0;"> <span id="LC1399" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- | Disambiguate "let ... in ..."</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1519" 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="1521" 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">@@ -1519,6 +1521,9 @@ instance DisambECP (HsCmd GhcPs) where</td>
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1519
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1521
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<pre style="margin: 0;"> <span id="LC1521" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">Body</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsCmd</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">HsCmd</span></span>
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1520
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1522
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<pre style="margin: 0;"> <span id="LC1522" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromCmd'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span></span>
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1521
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1523
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<pre style="margin: 0;"> <span id="LC1523" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromExp'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cmdFail</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>
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1524
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<pre style="margin: 0;">+<span id="LC1524" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsFieldUpdaterPV</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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1525
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<pre style="margin: 0;">+<span id="LC1525" class="line" lang="haskell"> <span class="n" style="color: #333;">cmdFail</span> <span class="p">(</span><span class="n" style="color: #333;">noSrcSpan</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>
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1526
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<pre style="margin: 0;">+<span id="LC1526" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Trying to make a field update in a command context"</span></span>
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1522
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1527
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<pre style="margin: 0;"> <span id="LC1527" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLamPV</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">mg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsCmdLam</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">mg</span><span class="p">)</span></span>
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1523
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1528
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<pre style="margin: 0;"> <span id="LC1528" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLetPV</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <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;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsCmdLet</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>
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1524
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1529
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<pre style="margin: 0;"> <span id="LC1529" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">InfixOp</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsCmd</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</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;">GhcPs</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1582" 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="1587" 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">@@ -1582,6 +1587,7 @@ instance DisambECP (HsExpr GhcPs) where</td>
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1582
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1587
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<pre style="margin: 0;"> <span id="LC1587" class="line" lang="haskell"> <span class="n" style="color: #333;">nest</span> <span class="mi" style="color: #099;">2</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">c</span><span class="p">)</span> <span class="p">]</span></span>
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1583
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1588
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<pre style="margin: 0;"> <span id="LC1588" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">hsHoleExpr</span><span class="p">)</span></span>
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1584
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1589
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<pre style="margin: 0;"> <span id="LC1589" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromExp'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span></span>
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1590
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<pre style="margin: 0;">+<span id="LC1590" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsFieldUpdaterPV</span> <span class="n" style="color: #333;">fields</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkFieldUpdater</span> <span class="n" style="color: #333;">fields</span> <span class="n" style="color: #333;">arg</span></span>
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1585
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1591
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<pre style="margin: 0;"> <span id="LC1591" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLamPV</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">mg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsLam</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">mg</span><span class="p">)</span></span>
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1586
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1592
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<pre style="margin: 0;"> <span id="LC1592" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLetPV</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsLet</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">bs</span> <span class="n" style="color: #333;">c</span><span class="p">)</span></span>
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1587
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1593
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<pre style="margin: 0;"> <span id="LC1593" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">InfixOp</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcPs</span><span class="p">)</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;">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">@@ -1669,6 +1675,9 @@ instance DisambECP (PatBuilder GhcPs) where</td>
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1669
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1675
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<pre style="margin: 0;"> <span id="LC1675" class="line" lang="haskell"> <span class="n" style="color: #333;">ecpFromExp'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span></span>
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1670
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1676
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<pre style="margin: 0;"> <span id="LC1676" class="line" lang="haskell"> <span class="n" style="color: #333;">addFatalError</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">$</span></span>
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1671
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1677
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<pre style="margin: 0;"> <span id="LC1677" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Expression syntax in pattern:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">e</span></span>
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1678
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<pre style="margin: 0;">+<span id="LC1678" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsFieldUpdaterPV</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span></span>
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1679
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<pre style="margin: 0;">+<span id="LC1679" class="line" lang="haskell"> <span class="n" style="color: #333;">addFatalError</span> <span class="n" style="color: #333;">noSrcSpan</span> <span class="o" style="font-weight: 600;">$</span></span>
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1680
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<pre style="margin: 0;">+<span id="LC1680" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Trying to make a field update in a pattern context"</span></span>
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1672
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1681
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<pre style="margin: 0;"> <span id="LC1681" class="line" lang="haskell"> <span class="n" style="color: #333;">mkHsLamPV</span> <span class="n" style="color: #333;">l</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">addFatalError</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">$</span></span>
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1673
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1682
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<pre style="margin: 0;"> <span id="LC1682" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Lambda-syntax in pattern."</span> <span class="o" style="font-weight: 600;">$$</span></span>
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1674
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1683
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<pre style="margin: 0;"> <span id="LC1683" class="line" lang="haskell"> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Pattern matching on functions is not possible."</span></span>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dde48b77356c548c6d625344946725f02e8518a6#9d8021babc748739661d89c9cce5e569145bf14b"><strong>record-dot-syntax-tests/Test.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">@@ -112,5 +112,4 @@ main = do</td>
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112
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112
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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"> <span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">a</span></span>
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113
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113
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">c</span><span class="p">{</span><span class="n" style="color: #333;">f</span><span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- 42, 1</span></span>
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114
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114
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">c</span><span class="p">{</span><span class="n" style="color: #333;">f</span><span class="p">,</span> <span class="n" style="color: #333;">g</span><span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- 42, 42</span></span>
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<pre style="margin: 0;">-<span id="LC115" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- print $ c{f, g.foo.bar.baz.quux = 4} -- Can't mix top-level and nested updates (limitation of this prototype).</span></span>
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<pre style="margin: 0;">-<span id="LC116" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">c</span><span class="p">{</span><span class="n" style="color: #333;">f</span><span class="p">}{</span><span class="n" style="color: #333;">g</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foo</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">bar</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">baz</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">quux</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">4</span><span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- Workaround; 42, 4</span></span></pre>
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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">c</span><span class="p">{</span><span class="n" style="color: #333;">f</span><span class="p">,</span> <span class="n" style="color: #333;">g</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foo</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">bar</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">baz</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">quux</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">4</span><span class="p">}</span> <span class="c1" style="color: #998; font-style: italic;">-- Can now mix top-level and nested updates!</span></span></pre>
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