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<h3>

Ben Gamari pushed to branch wip/tyconapp-opts

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df">0038463c</a></strong>

<div>

<span>by Ben Gamari</span>

<i>at 2020-04-09T00:15:14-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Some cleanup

</pre>

</li>

</ul>

<h4>6 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#4aad0050db1a8a20db8bbca149111de99cb299c9">

compiler/GHC/Core/TyCon.hs

</a>

</li>

<li class="file-stats">

<a href="#84c9d3ba34173297e7d7747e02caa2e004b164fc">

compiler/GHC/Core/Type.hs

</a>

</li>

<li class="file-stats">

<a href="#89a2e0e1a3095c7a42b10f2819049908908080e8">

compiler/GHC/Core/Unify.hs

</a>

</li>

<li class="file-stats">

<a href="#0188aac58d5dfb76292827933bb504a964ed7c01">

compiler/prelude/TysPrim.hs

</a>

</li>

<li class="file-stats">

<a href="#9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a">

compiler/typecheck/TcCanonical.hs

</a>

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<li class="file-stats">

<a href="#341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07">

compiler/typecheck/TcType.hs

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="4aad0050db1a8a20db8bbca149111de99cb299c9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#4aad0050db1a8a20db8bbca149111de99cb299c9"><strong>compiler/GHC/Core/TyCon.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2289" 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="2289" 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">@@ -2289,16 +2289,13 @@ expandSynTyCon_maybe</td>

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<td class="diff-line-num old_line" data-linenumber="2289" 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">

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<td class="diff-line-num new_line" data-linenumber="2289" 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">

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<pre style="margin: 0;"> <span id="LC2289" class="line" lang="haskell"><span class="n" style="color: #333;">expandSynTyCon_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

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<td class="diff-line-num old_line" data-linenumber="2290" 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">

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<td class="diff-line-num new_line" data-linenumber="2290" 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">

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<pre style="margin: 0;"> <span id="LC2290" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">SynonymTyCon</span> <span class="p">{</span> <span class="n" style="color: #333;">tyConTyVars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">synTcRhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;">tyConArity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">arity</span> <span class="p">}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2291" 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">

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<td class="diff-line-num new_line" data-linenumber="2291" 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">

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<pre style="margin: 0;"> <span id="LC2291" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tys</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2292" 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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<td class="diff-line-num new_line old" data-linenumber="2292" 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="LC2292" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left">tys</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2293" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2292" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2292" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">[]</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Avoid a bit of work in the case of nullary synonyms</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2293" 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">

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<td class="diff-line-num new_line" data-linenumber="2293" 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">

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<pre style="margin: 0;"> <span id="LC2293" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">_</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tys</span> <span class="p">`</span><span class="n" style="color: #333;">listLengthCmp</span><span class="p">`</span> <span class="n" style="color: #333;">arity</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2294" 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">

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<td class="diff-line-num new_line" data-linenumber="2294" 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">

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<pre style="margin: 0;"> <span id="LC2294" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">GT</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">tys</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;">drop</span> <span class="n" style="color: #333;">arity</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2295" 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">

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<td class="diff-line-num new_line" data-linenumber="2295" 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">

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<pre style="margin: 0;"> <span id="LC2295" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">EQ</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">tys</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC2296" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">LT</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

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<pre style="margin: 0;"> <span id="LC2297" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2298" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

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<td class="diff-line-num old old_line" data-linenumber="2299" 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="LC2299" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE expandSynTyCon_maybe #-}</span></span>

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2300

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<td class="diff-line-num new_line old" data-linenumber="2299" 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="LC2300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Inline to avoid allocation of tuples due to lack of nested CPR on sums.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2301" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Particularly relevant to coreView and tcView, which are hammered.</span></span>

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<pre style="margin: 0;"> <span id="LC2299" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC2300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">----------------</span></span>

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<pre style="margin: 0;"> <span id="LC2301" class="line" lang="haskell"></span>

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<br>

</li>

<li id="84c9d3ba34173297e7d7747e02caa2e004b164fc">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#84c9d3ba34173297e7d7747e02caa2e004b164fc"><strong>compiler/GHC/Core/Type.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="350" 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">@@ -350,18 +350,16 @@ See also #11715, which tracks removing this inconsistency.</td>

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<pre style="margin: 0;"> <span id="LC350" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

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<pre style="margin: 0;"> <span id="LC351" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell"><span class="cd">-- | Gives the typechecker view of a type. This unwraps synonyms but</span></span>

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<pre style="margin: 0;">-<span id="LC353" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- leaves 'Constraint' alone. c.f. <span class="idiff left right">coreView, which turns Constraint</span> into</span></span>

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<pre style="margin: 0;">-<span id="LC354" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">TYPE LiftedRep. Returns Nothing</span> if no unwrapping happens.</span></span>

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<pre style="margin: 0;">+<span id="LC353" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- leaves 'Constraint' alone. c.f. <span class="idiff left right">'coreView', which turns 'Constraint'</span> into</span></span>

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<pre style="margin: 0;">+<span id="LC354" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">@TYPE LiftedRep@. Returns 'Nothing'</span> if no unwrapping happens.</span></span>

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<pre style="margin: 0;"> <span id="LC355" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See also Note [coreView vs tcView]</span></span>

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<pre style="margin: 0;"> <span id="LC356" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE tcView #-}</span></span>

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<pre style="margin: 0;"> <span id="LC357" class="line" lang="haskell"><span class="n" style="color: #333;">tcView</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC358" class="line" lang="haskell"><span class="n" style="color: #333;">tcView</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC359" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tenv</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;">tys'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expandSynTyCon_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

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<pre style="margin: 0;">-<span id="LC360" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tenv</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">-<span id="LC361" class="line" lang="haskell">             <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkAppTys</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">tys'</span></span>

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<pre style="margin: 0;">-<span id="LC362" 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;">mkAppTys</span> <span class="p">(</span><span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">mkTvSubstPrs</span> <span class="n" style="color: #333;">tenv</span><span class="p">)</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="n" style="color: #333;">tys'</span></span>

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<pre style="margin: 0;">+<span id="LC359" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">res</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expandSynTyConApp_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

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<pre style="margin: 0;">+<span id="LC360" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">res</span></span>

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<pre style="margin: 0;"> <span id="LC361" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- The free vars of 'rhs' should all be bound by 'tenv', so it's</span></span>

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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- ok to use 'substTy' here.</span></span>

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<pre style="margin: 0;">+<span id="LC362" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- ok to use 'substTy' here<span class="idiff left right"> (which is what expandSynTyConApp_maybe does)</span>.</span></span>

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<pre style="margin: 0;"> <span id="LC363" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- See also Note [The substitution invariant] in GHC.Core.TyCo.Subst.</span></span>

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<pre style="margin: 0;"> <span id="LC364" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- Its important to use mkAppTys, rather than (foldl AppTy),</span></span>

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<pre style="margin: 0;"> <span id="LC365" class="line" lang="haskell">               <span class="c1" style="color: #998; font-style: italic;">-- because the function part might well return a</span></span>

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<pre style="margin: 0;"> <span id="LC368" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC369" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE coreView #-}</span></span>

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<pre style="margin: 0;"> <span id="LC370" class="line" lang="haskell"><span class="n" style="color: #333;">coreView</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;">-<span id="LC373" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^ This function <span class="idiff left right">S</span>trips off the /top layer only/ of a type synonym</span></span>

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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^ This function <span class="idiff left right">s</span>trips off the /top layer only/ of a type synonym</span></span>

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<pre style="margin: 0;"> <span id="LC372" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- application (if any) its underlying representation type.</span></span>

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<pre style="margin: 0;">-<span id="LC375" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns <span class="idiff left right">Nothing</span> if there is nothing to look through.</span></span>

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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns <span class="idiff left right">'Nothing'</span> if there is nothing to look through.</span></span>

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<pre style="margin: 0;"> <span id="LC374" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This function considers 'Constraint' to be a synonym of @TYPE LiftedRep@.</span></span>

</pre>

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377

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<pre style="margin: 0;"> <span id="LC375" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="378" 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">

378

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<pre style="margin: 0;"> <span id="LC376" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- By being non-recursive and inlined, this case analysis gets efficiently</span></span>

</pre>

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379

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<pre style="margin: 0;"> <span id="LC377" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- joined onto the case analysis that the caller is already doing</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="380" 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">

380

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<pre style="margin: 0;"> <span id="LC378" class="line" lang="haskell"><span class="n" style="color: #333;">coreView</span> <span class="n" style="color: #333;">ty</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC381" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tenv</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">,</span> <span class="n" style="color: #333;">tys'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expandSynTyCon_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC382" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tenv</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC383" class="line" lang="haskell">            <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">mkAppTys</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">tys'</span></span>

</pre>

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384

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<pre style="margin: 0;">-<span id="LC384" 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;">mkAppTys</span> <span class="p">(</span><span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">mkTvSubstPrs</span> <span class="n" style="color: #333;">tenv</span><span class="p">)</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="n" style="color: #333;">tys'</span></span>

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385

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<pre style="margin: 0;">-<span id="LC385" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- This equation is exactly like tcView</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="386" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC379" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">res</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expandSynTyConApp_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC380" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">res</span></span>

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<pre style="margin: 0;"> <span id="LC381" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC382" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- At the Core level, Constraint = Type</span></span>

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<pre style="margin: 0;"> <span id="LC383" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See Note [coreView vs tcView]</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="393" 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="388" 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">@@ -393,6 +388,21 @@ coreView ty@(TyConApp tc tys)</td>

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<pre style="margin: 0;"> <span id="LC388" class="line" lang="haskell"><span class="n" style="color: #333;">coreView</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

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<pre style="margin: 0;"> <span id="LC389" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC390" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="391" 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">

391

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<pre style="margin: 0;">+<span id="LC391" class="line" lang="haskell"><span class="n" style="color: #333;">expandSynTyConApp_maybe</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="392" 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">

392

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<pre style="margin: 0;">+<span id="LC392" class="line" lang="haskell"><span class="n" style="color: #333;">expandSynTyConApp_maybe</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="393" 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">

393

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<pre style="margin: 0;">+<span id="LC393" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">rhs</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">synTyConDefn_maybe</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="394" 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">

394

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<pre style="margin: 0;">+<span id="LC394" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tys</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="395" 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">

395

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<pre style="margin: 0;">+<span id="LC395" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">mkAppTys</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">tys</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="396" 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">

396

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<pre style="margin: 0;">+<span id="LC396" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">_</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">tys</span> <span class="p">`</span><span class="n" style="color: #333;">listLengthCmp</span><span class="p">`</span> <span class="n" style="color: #333;">arity</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="397" 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">

397

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<pre style="margin: 0;">+<span id="LC397" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">GT</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">mkAppTys</span> <span class="n" style="color: #333;">rhs'</span> <span class="p">(</span><span class="n" style="color: #333;">drop</span> <span class="n" style="color: #333;">arity</span> <span class="n" style="color: #333;">tys</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="398" 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">

398

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<pre style="margin: 0;">+<span id="LC398" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">EQ</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">rhs'</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="399" 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">

399

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<pre style="margin: 0;">+<span id="LC399" class="line" lang="haskell">              <span class="kt" style="color: #458; font-weight: 600;">LT</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="400" 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">

400

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<pre style="margin: 0;">+<span id="LC400" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="401" 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">

401

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<pre style="margin: 0;">+<span id="LC401" class="line" lang="haskell">          <span class="n" style="color: #333;">arity</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConArity</span> <span class="n" style="color: #333;">tc</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="402" 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">

402

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<pre style="margin: 0;">+<span id="LC402" class="line" lang="haskell">          <span class="n" style="color: #333;">rhs'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substTy</span> <span class="p">(</span><span class="n" style="color: #333;">mkTvSubstPrs</span> <span class="p">(</span><span class="n" style="color: #333;">tvs</span> <span class="p">`</span><span class="n" style="color: #333;">zip</span><span class="p">`</span> <span class="n" style="color: #333;">tys</span><span class="p">))</span> <span class="n" style="color: #333;">rhs</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="403" 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">

403

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<pre style="margin: 0;">+<span id="LC403" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="404" 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">

404

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<pre style="margin: 0;">+<span id="LC404" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="396" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="405" 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">

405

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<pre style="margin: 0;">+<span id="LC405" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="396" 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">

396

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<td class="diff-line-num new_line" data-linenumber="406" 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">

406

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<pre style="margin: 0;"> <span id="LC406" class="line" lang="haskell"><span class="n" style="color: #333;">expandTypeSynonyms</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="397" 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">

397

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<td class="diff-line-num new_line" data-linenumber="407" 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">

407

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<pre style="margin: 0;"> <span id="LC407" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ^ Expand out all type synonyms.  Actually, it'd suffice to expand out</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC408" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- just the ones that discard type variables (e.g.  type Funny a = Int)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1223" 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="1233" 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">@@ -1223,8 +1233,10 @@ TyConApp constructors were all duplicates of `Type` applied to no arguments.</td>

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<pre style="margin: 0;"> <span id="LC1233" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1234" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Therefore in `mkTyConApp` we have a special case for `Type` to ensure that</span></span>

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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">only one `TyConApp 'Type []` closure is allocated during the course of</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1226" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">compilation. In order to avoid a potentially expensive series of checks in</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1227" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`mkTyConApp` only this egregious case is special cased at the moment.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1236" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">compilation.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1237" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1238" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We also have a similar special-case for applications of TYPE; see</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1239" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Prefer Type over TYPE 'LiftedPtrRep] for details.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1240" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1241" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC1242" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">---------------------------------------------------------------------</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1236" 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="1248" 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">@@ -1236,7 +1248,6 @@ compilation. In order to avoid a potentially expensive series of checks in</td>

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<pre style="margin: 0;"> <span id="LC1248" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- its arguments.  Applies its arguments to the constructor from left to right.</span></span>

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<pre style="margin: 0;"> <span id="LC1249" class="line" lang="haskell"><span class="n" style="color: #333;">mkTyConApp</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TyCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC1250" class="line" lang="haskell"><span class="n" style="color: #333;">mkTyConApp</span> <span class="n" style="color: #333;">tycon</span> <span class="n" style="color: #333;">tys</span></span>

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<pre style="margin: 0;">-<span id="LC1239" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- TODO: TYPE 'LiftedRep</span></span>

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<pre style="margin: 0;"> <span id="LC1251" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFunTyCon</span> <span class="n" style="color: #333;">tycon</span></span>

</pre>

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1241

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<td class="diff-line-num new_line" data-linenumber="1252" 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">

1252

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<pre style="margin: 0;"> <span id="LC1252" class="line" lang="haskell">  <span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">_rep1</span><span class="p">,</span><span class="n" style="color: #333;">_rep2</span><span class="p">,</span><span class="n" style="color: #333;">ty1</span><span class="p">,</span><span class="n" style="color: #333;">ty2</span><span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1242" 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">

1242

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<td class="diff-line-num new_line" data-linenumber="1253" 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">

1253

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<pre style="margin: 0;"> <span id="LC1253" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- The FunTyCon (->) is always a visible one</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1245" 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="1256" 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">@@ -1245,7 +1256,7 @@ mkTyConApp tycon tys</td>

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<td class="diff-line-num old_line" data-linenumber="1245" 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">

1245

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<td class="diff-line-num new_line" data-linenumber="1256" 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">

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<pre style="margin: 0;"> <span id="LC1256" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">liftedTypeKindTyCon</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1246" 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">

1246

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<td class="diff-line-num new_line" data-linenumber="1257" 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">

1257

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<pre style="margin: 0;"> <span id="LC1257" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">tys</span><span class="p">,</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">$$</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">tys</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1247" 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">

1247

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<td class="diff-line-num new_line" data-linenumber="1258" 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">

1258

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<pre style="margin: 0;"> <span id="LC1258" class="line" lang="haskell">    <span class="n" style="color: #333;">liftedTypeKindTyConApp</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1248" 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">

1248

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<td class="diff-line-num new_line old" data-linenumber="1259" 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="LC1248" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Note [<span class="idiff left right">mkTyConApp and Type</span>]</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1249" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1259" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC1259" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Note [<span class="idiff left right">Prefer Type over TYPE 'LiftedPtrRep</span>]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1249" 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">

1249

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<td class="diff-line-num new_line" data-linenumber="1260" 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">

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<pre style="margin: 0;"> <span id="LC1260" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tycon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tYPETyCon</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1250" 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">

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<td class="diff-line-num new_line" data-linenumber="1261" 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">

1261

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<pre style="margin: 0;"> <span id="LC1261" class="line" lang="haskell">  <span class="p">,</span> <span class="p">[</span><span class="n" style="color: #333;">rep</span><span class="p">]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tys</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1251" 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">

1251

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<td class="diff-line-num new_line" data-linenumber="1262" 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">

1262

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<pre style="margin: 0;"> <span id="LC1262" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tYPE</span> <span class="n" style="color: #333;">rep</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2203" 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="2214" 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">@@ -2203,6 +2214,36 @@ But the left is an AppTy while the right is a TyConApp. The solution is</td>

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2203

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<td class="diff-line-num new_line" data-linenumber="2214" 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">

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<pre style="margin: 0;"> <span id="LC2214" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to use repSplitAppTy_maybe to break up the TyConApp into its pieces and</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2204" 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">

2204

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<td class="diff-line-num new_line" data-linenumber="2215" 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">

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<pre style="margin: 0;"> <span id="LC2215" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">then continue. Easy to do, but also easy to forget to do.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2205" 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">

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<td class="diff-line-num new_line" data-linenumber="2216" 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">

2216

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<pre style="margin: 0;"> <span id="LC2216" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2217" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2217" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2218" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Comparing nullary type synonyms]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2219" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="2220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2220" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider the task of testing equality between two 'Type's of the form</span></span>

</pre>

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2221

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<pre style="margin: 0;">+<span id="LC2221" class="line" lang="haskell"></span>

</pre>

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2222

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<pre style="margin: 0;">+<span id="LC2222" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  TyConApp tc []</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2223" 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">

2223

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<pre style="margin: 0;">+<span id="LC2223" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2224" 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">

2224

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<pre style="margin: 0;">+<span id="LC2224" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">where @tc@ is a type synonym. A naive way to perform this comparison these</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2225" 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">

2225

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<pre style="margin: 0;">+<span id="LC2225" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">would first expand the synonym and then compare the resulting expansions.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2226" 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">

2226

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<pre style="margin: 0;">+<span id="LC2226" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2227" 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">

2227

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<pre style="margin: 0;">+<span id="LC2227" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">However, this is obviously wasteful and the RHS of @tc@ may be large; it is</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2228" 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">

2228

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<pre style="margin: 0;">+<span id="LC2228" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">much better to rather compare the TyCons directly. Consequently, before</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2229" 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">

2229

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<pre style="margin: 0;">+<span id="LC2229" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">expanding type synonyms in type comparisons we first look for a nullary</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2230" 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">

2230

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<pre style="margin: 0;">+<span id="LC2230" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">TyConApp and simply compare the TyCons if we find one. Of course, if we find</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2231" 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">

2231

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<pre style="margin: 0;">+<span id="LC2231" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">that the TyCons are *not* equal then we still need to perform the expansion as</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2232" 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">

2232

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<pre style="margin: 0;">+<span id="LC2232" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">their RHSs may still be equal.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="2233" 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">

2233

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<pre style="margin: 0;">+<span id="LC2233" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2234" 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">

2234

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<pre style="margin: 0;">+<span id="LC2234" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We perform this optimisation in a number of places:</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2235" 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">

2235

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<pre style="margin: 0;">+<span id="LC2235" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2236" 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">

2236

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<pre style="margin: 0;">+<span id="LC2236" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * GHC.Core.Types.eqType</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2237" 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">

2237

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<pre style="margin: 0;">+<span id="LC2237" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * GHC.Core.Types.nonDetCmpType</span></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="2238" 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">

2238

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<pre style="margin: 0;">+<span id="LC2238" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * GHC.Core.Unify.unify_ty</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2239" 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">

2239

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<pre style="margin: 0;">+<span id="LC2239" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * TcCanonical.can_eq_nc'</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2240" 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">

2240

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<pre style="margin: 0;">+<span id="LC2240" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * TcUnify.uType</span></span>

</pre>

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2241

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<pre style="margin: 0;">+<span id="LC2241" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC2242" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This optimisation is especially helpful for the ubiquitous GHC.Types.Type,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2243" 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">

2243

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<pre style="margin: 0;">+<span id="LC2243" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">since GHC prefers to use the type synonym over @TYPE 'LiftedPtr@ applications</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2244" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC2244" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">whenever possible. See [Prefer Type over TYPE 'LiftedPtrRep] in TysPrim for</span></span>

</pre>

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2245

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<pre style="margin: 0;">+<span id="LC2245" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">details.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC2246" class="line" lang="haskell"></span>

</pre>

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2247

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<pre style="margin: 0;"> <span id="LC2247" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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2207

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2248

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<pre style="margin: 0;"> <span id="LC2248" class="line" lang="haskell"></span>

</pre>

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2208

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<td class="diff-line-num new_line" data-linenumber="2249" 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">

2249

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<pre style="margin: 0;"> <span id="LC2249" class="line" lang="haskell"><span class="n" style="color: #333;">eqType</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2276" 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="2317" 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">@@ -2276,7 +2317,6 @@ data TypeOrdering = TLT  -- ^ @t1 < t2@</td>

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<pre style="margin: 0;"> <span id="LC2317" class="line" lang="haskell">                  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">TGT</span>  <span class="c1" style="color: #998; font-style: italic;">-- ^ @t1 > t2@</span></span>

</pre>

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2318

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<pre style="margin: 0;"> <span id="LC2318" class="line" lang="haskell">                  <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Ord</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Enum</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Bounded</span><span class="p">)</span></span>

</pre>

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2319

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<pre style="margin: 0;"> <span id="LC2319" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2279" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- TODO: nullary synonym optimization</span></span>

</pre>

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2320

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<pre style="margin: 0;"> <span id="LC2320" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetCmpTypeX</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RnEnv2</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Ordering</span>  <span class="c1" style="color: #998; font-style: italic;">-- Main workhorse</span></span>

</pre>

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2281

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2321

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<pre style="margin: 0;"> <span id="LC2321" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Non-trivial definitional equality] in GHC.Core.TyCo.Rep</span></span>

</pre>

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2322

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<pre style="margin: 0;"> <span id="LC2322" class="line" lang="haskell"><span class="n" style="color: #333;">nonDetCmpTypeX</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">orig_t1</span> <span class="n" style="color: #333;">orig_t2</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<br>

</li>

<li id="89a2e0e1a3095c7a42b10f2819049908908080e8">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#89a2e0e1a3095c7a42b10f2819049908908080e8"><strong>compiler/GHC/Core/Unify.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="957" 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">@@ -957,7 +957,7 @@ unify_ty :: UMEnv</td>

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957

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957

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<pre style="margin: 0;"> <span id="LC957" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Respects newtypes, PredTypes</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="958" 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">

958

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958

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<pre style="margin: 0;"> <span id="LC958" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="959" 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">

959

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959

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<pre style="margin: 0;"> <span id="LC959" class="line" lang="haskell"><span class="n" style="color: #333;">unify_ty</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ty2</span> <span class="n" style="color: #333;">kco</span></span>

</pre>

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960

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<td class="diff-line-num new_line old" data-linenumber="960" 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="LC960" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms].</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="961" 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">

</td>

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<pre style="margin: 0;">+<span id="LC960" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms]<span class="idiff left right"> in GHC.Core.Type</span>.</span></span>

</pre>

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961

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961

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<pre style="margin: 0;"> <span id="LC961" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc1</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ty1</span></span>

</pre>

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962

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<pre style="margin: 0;"> <span id="LC962" class="line" lang="haskell">  <span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc2</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ty2</span></span>

</pre>

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963

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<pre style="margin: 0;"> <span id="LC963" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">tc1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tc2</span>                <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="nb" style="color: #0086b3;">()</span></span>

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</li>

<li id="0188aac58d5dfb76292827933bb504a964ed7c01">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#0188aac58d5dfb76292827933bb504a964ed7c01"><strong>compiler/prelude/TysPrim.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="527" 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="527" 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">@@ -527,11 +527,35 @@ mkPrimTcName built_in_syntax occ key tycon</td>

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527

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<pre style="margin: 0;"> <span id="LC527" class="line" lang="haskell"><span class="cd">-- | Given a RuntimeRep, applies TYPE to it.</span></span>

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<pre style="margin: 0;"> <span id="LC528" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- see Note [TYPE and RuntimeRep]</span></span>

</pre>

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529

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529

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<pre style="margin: 0;"> <span id="LC529" class="line" lang="haskell"><span class="n" style="color: #333;">tYPE</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC530" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- static cases</span></span>

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531

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530

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<pre style="margin: 0;"> <span id="LC530" class="line" lang="haskell"><span class="n" style="color: #333;">tYPE</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>

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531

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<pre style="margin: 0;"> <span id="LC531" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tc</span> <span class="p">`</span><span class="n" style="color: #333;">hasKey</span><span class="p">`</span> <span class="n" style="color: #333;">liftedRepDataConKey</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftedTypeKind</span>  <span class="c1" style="color: #998; font-style: italic;">-- TYPE 'LiftedPtrRep</span></span>

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532

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<pre style="margin: 0;"> <span id="LC532" class="line" lang="haskell"><span class="n" style="color: #333;">tYPE</span> <span class="n" style="color: #333;">rr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tYPETyCon</span> <span class="p">[</span><span class="n" style="color: #333;">rr</span><span class="p">]</span></span>

</pre>

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534

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533

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<pre style="margin: 0;"> <span id="LC533" class="line" lang="haskell"></span>

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<td class="diff-line-num new old_line" data-linenumber="535" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC534" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note [Prefer Type over TYPE 'LiftedPtrRep]</span></span>

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535

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<pre style="margin: 0;">+<span id="LC535" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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536

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<pre style="margin: 0;">+<span id="LC536" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="537" 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">

537

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<pre style="margin: 0;">+<span id="LC537" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The Core of nearly any program will have numerous occurrences of</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="538" 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">

538

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<pre style="margin: 0;">+<span id="LC538" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @TYPE 'LiftedPtrRep@ floating about. Consequently, we try hard to ensure</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="539" 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">

539

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<pre style="margin: 0;">+<span id="LC539" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- that operations on such types are efficient:</span></span>

</pre>

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540

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<pre style="margin: 0;">+<span id="LC540" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="541" 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">

541

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<pre style="margin: 0;">+<span id="LC541" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * Instead of representing the lifted kind as</span></span>

</pre>

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542

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<pre style="margin: 0;">+<span id="LC542" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     @TyConApp tYPETyCon [liftedRepDataCon]@ we rather prefer to</span></span>

</pre>

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543

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<pre style="margin: 0;">+<span id="LC543" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     use the 'GHC.Types.Type' type synonym (available in GHC as</span></span>

</pre>

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544

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<pre style="margin: 0;">+<span id="LC544" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     'TysPrim.liftedTypeKind'). Note only is this a smaller AST but it also</span></span>

</pre>

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545

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<pre style="margin: 0;">+<span id="LC545" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     guarantees sharing on the heap.</span></span>

</pre>

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546

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<pre style="margin: 0;">+<span id="LC546" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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547

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<pre style="margin: 0;">+<span id="LC547" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * To avoid allocating 'TyConApp' constructors 'TysPrim.tYPE'</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="548" 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">

548

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<pre style="margin: 0;">+<span id="LC548" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     catches the lifted case and uses `liftedTypeKind` instead of building an</span></span>

</pre>

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549

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<pre style="margin: 0;">+<span id="LC549" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     application.</span></span>

</pre>

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550

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<pre style="margin: 0;">+<span id="LC550" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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551

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<pre style="margin: 0;">+<span id="LC551" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * Similarly, 'Type.mkTyConApp' catches applications of TYPE and</span></span>

</pre>

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552

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<pre style="margin: 0;">+<span id="LC552" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     handles them using 'TysPrim.tYPE', ensuring that it benefits from the</span></span>

</pre>

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553

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<pre style="margin: 0;">+<span id="LC553" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     optimisation described above.</span></span>

</pre>

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554

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<pre style="margin: 0;">+<span id="LC554" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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555

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<pre style="margin: 0;">+<span id="LC555" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--   * Since 'liftedTypeKind' is a nullary type synonym application,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="535" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="556" 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">

556

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<pre style="margin: 0;">+<span id="LC556" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     it benefits from the optimisation described in Note [Comparing nullary</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="535" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="557" 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">

557

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<pre style="margin: 0;">+<span id="LC557" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     type synonyms] in "GHC.Core.Type".</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="535" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="558" 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">

558

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<pre style="margin: 0;">+<span id="LC558" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="535" 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">

535

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<td class="diff-line-num new_line" data-linenumber="559" 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">

559

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<pre style="margin: 0;"> <span id="LC559" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="536" 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">

536

</td>

<td class="diff-line-num new_line" data-linenumber="560" 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">

560

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<pre style="margin: 0;"> <span id="LC560" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="537" 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">

537

</td>

<td class="diff-line-num new_line" data-linenumber="561" 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">

561

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<pre style="margin: 0;"> <span id="LC561" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

</pre>

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<br>

</li>

<li id="9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#9f8e9eab0dc8b12ae9f92fbb76ddca15c817667a"><strong>compiler/typecheck/TcCanonical.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="969" 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="969" 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">@@ -969,14 +969,13 @@ can_eq_nc'</td>

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<td class="diff-line-num old_line" data-linenumber="969" 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">

969

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<td class="diff-line-num new_line" data-linenumber="969" 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">

969

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<pre style="margin: 0;"> <span id="LC969" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>    <span class="c1" style="color: #998; font-style: italic;">-- RHS, after and before type-synonym expansion, resp</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="970" 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">

970

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<td class="diff-line-num new_line" data-linenumber="970" 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">

970

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<pre style="margin: 0;"> <span id="LC970" class="line" lang="haskell">   <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TcS</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StopOrContinue</span> <span class="kt" style="color: #458; font-weight: 600;">Ct</span><span class="p">)</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="971" 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">

971

</td>

<td class="diff-line-num new_line" data-linenumber="971" 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">

971

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC971" class="line" lang="haskell"></span>

</pre>

</td>

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<tr class="line_holder old" id="" style="line-height: 1.6;">

<td class="diff-line-num old old_line" data-linenumber="972" 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">

972

</td>

<td class="diff-line-num new_line old" data-linenumber="972" 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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<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC972" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms].</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="973" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="972" 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">

972

</td>

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<pre style="margin: 0;">+<span id="LC972" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms]<span class="idiff left right"> in GHC.Core.Type</span>.</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="973" 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">

973

</td>

<td class="diff-line-num new_line" data-linenumber="973" 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">

973

</td>

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<pre style="margin: 0;"> <span id="LC973" class="line" lang="haskell"><span class="n" style="color: #333;">can_eq_nc'</span> <span class="n" style="color: #333;">_flat</span> <span class="n" style="color: #333;">_rdr_env</span> <span class="n" style="color: #333;">_envs</span> <span class="n" style="color: #333;">ev</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">ty1</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc1</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="n" style="color: #333;">_ps_ty1</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc2</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="n" style="color: #333;">_ps_ty2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="974" 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">

974

</td>

<td class="diff-line-num new_line" data-linenumber="974" 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">

974

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC974" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tc1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tc2</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="975" 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">

975

</td>

<td class="diff-line-num new_line" data-linenumber="975" 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">

975

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<pre style="margin: 0;"> <span id="LC975" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">canEqReflexive</span> <span class="n" style="color: #333;">ev</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">ty1</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="976" 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">

976

</td>

<td class="diff-line-num new_line" data-linenumber="976" 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">

976

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC976" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="977" 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">

977

</td>

<td class="diff-line-num new_line" data-linenumber="977" 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">

977

</td>

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<pre style="margin: 0;"> <span id="LC977" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Expand synonyms first; see Note [Type synonyms and canonicalization]</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="978" 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">

978

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<td class="diff-line-num new_line" data-linenumber="978" 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">

978

</td>

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<pre style="margin: 0;"> <span id="LC978" class="line" lang="haskell"><span class="n" style="color: #333;">can_eq_nc'</span> <span class="n" style="color: #333;">flat</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">envs</span> <span class="n" style="color: #333;">ev</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">ty1</span> <span class="n" style="color: #333;">ps_ty1</span> <span class="n" style="color: #333;">ty2</span> <span class="n" style="color: #333;">ps_ty2</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="979" 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">

979

</td>

<td class="diff-line-num new_line old" data-linenumber="979" 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="LC979" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- TODO: Handle nullary synonyms</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="980" 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">

980

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<td class="diff-line-num new_line" data-linenumber="979" 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">

979

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<pre style="margin: 0;"> <span id="LC979" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">ty1'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcView</span> <span class="n" style="color: #333;">ty1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">can_eq_nc'</span> <span class="n" style="color: #333;">flat</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">envs</span> <span class="n" style="color: #333;">ev</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">ty1'</span> <span class="n" style="color: #333;">ps_ty1</span> <span class="n" style="color: #333;">ty2</span>  <span class="n" style="color: #333;">ps_ty2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="981" 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">

981

</td>

<td class="diff-line-num new_line" data-linenumber="980" 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">

980

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<pre style="margin: 0;"> <span id="LC980" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">ty2'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">tcView</span> <span class="n" style="color: #333;">ty2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">can_eq_nc'</span> <span class="n" style="color: #333;">flat</span> <span class="n" style="color: #333;">rdr_env</span> <span class="n" style="color: #333;">envs</span> <span class="n" style="color: #333;">ev</span> <span class="n" style="color: #333;">eq_rel</span> <span class="n" style="color: #333;">ty1</span>  <span class="n" style="color: #333;">ps_ty1</span> <span class="n" style="color: #333;">ty2'</span> <span class="n" style="color: #333;">ps_ty2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="982" 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">

982

</td>

<td class="diff-line-num new_line" data-linenumber="981" 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">

981

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<pre style="margin: 0;"> <span id="LC981" class="line" lang="haskell"></span>

</pre>

</td>

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<br>

</li>

<li id="341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0038463cb7070090b9e62f0c5278a8f8f47ac7df#341fd962c5f2c9fcf8be3dbdaa9a14ee1538af07"><strong>compiler/typecheck/TcType.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1533" 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="1533" 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">@@ -1533,7 +1533,7 @@ tc_eq_type keep_syns vis_only orig_ty1 orig_ty2</td>

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<td class="diff-line-num old_line" data-linenumber="1533" 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">

1533

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<td class="diff-line-num new_line" data-linenumber="1533" 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">

1533

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<pre style="margin: 0;"> <span id="LC1533" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">orig_env</span> <span class="n" style="color: #333;">orig_ty1</span> <span class="n" style="color: #333;">orig_ty2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1534" 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">

1534

</td>

<td class="diff-line-num new_line" data-linenumber="1534" 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">

1534

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<pre style="margin: 0;"> <span id="LC1534" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1535" 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">

1535

</td>

<td class="diff-line-num new_line" data-linenumber="1535" 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">

1535

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<pre style="margin: 0;"> <span id="LC1535" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">RnEnv2</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1536" 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">

1536

</td>

<td class="diff-line-num new_line old" data-linenumber="1536" 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="LC1536" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms].</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1537" 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">

</td>

<td class="diff-line-num new new_line" data-linenumber="1536" 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">

1536

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<pre style="margin: 0;">+<span id="LC1536" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Comparing nullary type synonyms]<span class="idiff left right"> in GHC.Core.Type</span>.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1537" 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">

1537

</td>

<td class="diff-line-num new_line" data-linenumber="1537" 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">

1537

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<pre style="margin: 0;"> <span id="LC1537" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span>   <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc1</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc2</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1538" 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">

1538

</td>

<td class="diff-line-num new_line" data-linenumber="1538" 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">

1538

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<pre style="margin: 0;"> <span id="LC1538" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">tc1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tc2</span></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1539" 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">

1539

</td>

<td class="diff-line-num new_line" data-linenumber="1539" 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">

1539

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<pre style="margin: 0;"> <span id="LC1539" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1570" 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="1570" 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">@@ -1570,7 +1570,6 @@ tc_eq_type keep_syns vis_only orig_ty1 orig_ty2</td>

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<td class="diff-line-num old_line" data-linenumber="1570" 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">

1570

</td>

<td class="diff-line-num new_line" data-linenumber="1570" 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">

1570

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<pre style="margin: 0;"> <span id="LC1570" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">s1</span> <span class="n" style="color: #333;">s2</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1571" 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">

1571

</td>

<td class="diff-line-num new_line" data-linenumber="1571" 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">

1571

</td>

<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1571" class="line" lang="haskell"></span>

</pre>

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1572

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1572

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<pre style="margin: 0;"> <span id="LC1572" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc1</span> <span class="n" style="color: #333;">ts1</span><span class="p">)</span>   <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">TyConApp</span> <span class="n" style="color: #333;">tc2</span> <span class="n" style="color: #333;">ts2</span><span class="p">)</span></span>

</pre>

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1573

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<td class="diff-line-num new_line old" data-linenumber="1573" 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="LC1573" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- TODO: nullary synonym optimisation</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1574" 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">

1574

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<td class="diff-line-num new_line" data-linenumber="1573" 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">

1573

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<pre style="margin: 0;"> <span id="LC1573" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tc1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tc2</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">gos</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">tc_vis</span> <span class="n" style="color: #333;">tc1</span><span class="p">)</span> <span class="n" style="color: #333;">ts1</span> <span class="n" style="color: #333;">ts2</span></span>

</pre>

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1575

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<td class="diff-line-num new_line" data-linenumber="1574" 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">

1574

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<pre style="margin: 0;"> <span id="LC1574" class="line" lang="haskell"></span>

</pre>

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1576

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1575

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<pre style="margin: 0;"> <span id="LC1575" class="line" lang="haskell">    <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CastTy</span> <span class="n" style="color: #333;">t1</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span>   <span class="n" style="color: #333;">t2</span>              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span></span>

</pre>

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