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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>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/26b29ebac6ba3da8caec77f73c0a1d2ec8dbe512">26b29eba</a></strong>
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<span>by Shayne Fletcher</span>
<i>at 2020-10-11T21:47:27-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">add AnnDot annotation to getField calc
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<h4>1 changed file:</h4>
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compiler/GHC/Parser.y
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<h4>Changes:</h4>
<li id="bf951467d4a9aa443cb109cb4c84a2891945649b">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/26b29ebac6ba3da8caec77f73c0a1d2ec8dbe512#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">@@ -2618,20 +2618,18 @@ fexp :: { ECP }</td>
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<pre style="margin: 0;"> <span id="LC2618" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC2619" 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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<pre style="margin: 0;"> <span id="LC2620" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">fexp</span> <span class="kt" style="color: #458; font-weight: 600;">TIGHT_INFIX_PROJ</span> <span class="n" style="color: #333;">field</span></span>
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<pre style="margin: 0;">-<span id="LC2621" 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="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">runPV</span> <span class="p">(</span><span class="n" style="color: #333;">unECP</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2622" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Suppose lhs is an application term e.g. 'f a' and</span></span>
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<pre style="margin: 0;">-<span id="LC2623" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- rhs is '.b'. Usually we want the parse 'f</span></span>
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<pre style="margin: 0;">-<span id="LC2624" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (a.b)' rather than '(f a).b.'. However, if lhs is</span></span>
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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>
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<pre style="margin: 0;">-<span id="LC2629" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">isGetField</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC2630" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">comb2</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">in</span></span>
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<pre style="margin: 0;">-<span id="LC2631" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="p">(</span><span class="n" style="color: #333;">getLoc</span> <span class="n" style="color: #333;">f</span> <span class="p">`</span><span class="n" style="color: #333;">combineSrcSpans</span><span class="p">`</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC2632" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">mkGetField</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC2633" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkGetField</span> <span class="p">(</span><span class="n" style="color: #333;">comb2</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$></span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span></span>
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<pre style="margin: 0;">-<span id="LC2634" class="line" lang="haskell"> <span class="p">}}</span></span>
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<pre style="margin: 0;">+<span id="LC2621" class="line" lang="haskell"> <span class="p">{</span><span class="o" style="font-weight: 600;">%</span> <span class="n" style="color: #333;">runPV</span> <span class="p">(</span><span class="n" style="color: #333;">unECP</span> <span class="o" style="font-weight: 600;">$</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;">$</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">-></span></span>
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2622
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<pre style="margin: 0;">+<span id="LC2622" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Suppose lhs is an application term e.g. 'f a'</span></span>
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2623
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<pre style="margin: 0;">+<span id="LC2623" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- and rhs is '.b'. Usually we want the parse 'f</span></span>
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2624
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<pre style="margin: 0;">+<span id="LC2624" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (a.b)' rather than '(f a).b.'. However, if lhs</span></span>
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2625
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<pre style="margin: 0;">+<span id="LC2625" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- is a projection 'r.a' (say) then we want the</span></span>
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2626
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<pre style="margin: 0;">+<span id="LC2626" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- parse '(r.a).b'.</span></span>
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2627
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<pre style="margin: 0;">+<span id="LC2627" class="line" lang="haskell"> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">ecpFromExp</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">ams</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">case</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="kr" style="font-weight: 600;">of</span></span>
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2628
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<pre style="margin: 0;">+<span id="LC2628" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">arg</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">isGetField</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">-></span></span>
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2629
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<pre style="margin: 0;">+<span id="LC2629" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">comb2</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span> <span class="kr" style="font-weight: 600;">in</span></span>
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2630
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<pre style="margin: 0;">+<span id="LC2630" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="p">(</span><span class="n" style="color: #333;">getLoc</span> <span class="n" style="color: #333;">f</span> <span class="p">`</span><span class="n" style="color: #333;">combineSrcSpans</span><span class="p">`</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>
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2631
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<pre style="margin: 0;">+<span id="LC2631" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsApp</span> <span class="n" style="color: #333;">noExtField</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">mkGetField</span> <span class="n" style="color: #333;">l</span> <span class="n" style="color: #333;">arg</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">3</span><span class="p">))</span></span>
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2632
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<pre style="margin: 0;">+<span id="LC2632" 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;">mkGetField</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="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 class="p">[</span><span class="n" style="color: #333;">mj</span> <span class="kt" style="color: #458; font-weight: 600;">AnnDot</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">2</span><span class="p">]</span> <span class="p">}</span></span>
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2635
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2633
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<pre style="margin: 0;"> <span id="LC2633" class="line" lang="haskell"></span>
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2636
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2634
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<pre style="margin: 0;"> <span id="LC2634" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">aexp</span> <span class="p">{</span> <span class="o" style="font-weight: 600;">$</span><span class="mi" style="color: #099;">1</span> <span class="p">}</span></span>
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2637
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2635
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<pre style="margin: 0;"> <span id="LC2635" class="line" lang="haskell"></span>
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