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<h3>
Richard Eisenberg pushed to branch wip/doc-iface-tuple-ty
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/9cc826502c0fb811006185d92db7671d0d2c8a12">9cc82650</a></strong>
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<span>by Richard Eisenberg</span>
<i>at 2020-09-15T18:05:50-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Document IfaceTupleTy
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<h4>1 changed file:</h4>
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<a href="#f2b2b84d138b362920ab9f144f58bf16254aab64">
compiler/GHC/Iface/Type.hs
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<h4>Changes:</h4>
<li id="f2b2b84d138b362920ab9f144f58bf16254aab64">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/9cc826502c0fb811006185d92db7671d0d2c8a12#f2b2b84d138b362920ab9f144f58bf16254aab64"><strong>compiler/GHC/Iface/Type.hs</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="176" 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">@@ -176,6 +176,11 @@ data IfaceType</td>
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<pre style="margin: 0;"> <span id="LC176" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">PromotionFlag</span> <span class="c1" style="color: #998; font-style: italic;">-- A bit like IfaceTyCon</span></span>
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<pre style="margin: 0;"> <span id="LC177" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IfaceAppArgs</span> <span class="c1" style="color: #998; font-style: italic;">-- arity = length args</span></span>
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<pre style="margin: 0;"> <span id="LC178" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- For promoted data cons, the kind args are omitted</span></span>
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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Why have this? Only for efficiency: IfaceTupleTy can omit the</span></span>
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<pre style="margin: 0;">+<span id="LC180" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- type arguments, as they can be recreated when deserializing.</span></span>
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<pre style="margin: 0;">+<span id="LC181" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- In an experiment, removing IfaceTupleTy resulted in a 0.75% regression</span></span>
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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- in interface file size (in GHC's boot libraries).</span></span>
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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- See !3987.</span></span>
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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC185" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">IfaceMult</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IfaceType</span></span>
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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"></span>
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