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<h3>

Sebastian Graf pushed to branch wip/pmcheck-refuts

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/0e1b15dbd63928d9edbf336189f037abaa3876cf">0e1b15db</a></strong>

<div>

<span>by Sebastian Graf</span>

<i>at 2019-05-23T11:28:34Z</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">TmOracle: Replace negative term equalities by refutable PmAltCons

The `PmExprEq` business was a huge hack and was at the same time vastly

too powerful and not powerful enough to encode negative term equalities,

i.e. facts of the form "forall y. x ≁ Just y".

This patch introduces the concept of 'refutable shapes': What matters

for the pattern match checker is being able to encode knowledge of the

form "x can no longer be the literal 5" or "x can no longer be Just y,

for any y". We encode this knowledge in the form of a `PmRefutEnv`,

storing a set of newly introduced `PmAltCon`s (literals and `ConLike`s)

for each variable denoting equations of the above form.

So, say we have `x ≁ Just ∈ refuts` in the term oracle context and

try to solve an equality like `x ~ Just 5`. The entry in the refutable

environment will immediately lead to a contradiction.

This machinery makes the whole `PmExprEq` business completely

unnecessary, getting rid of a lot of (mostly dead) code.

Note that the PmAltConLike case is currently unnecessary. This is bound

to change in a follow-up patch. If we began to use PmAltConLike, we'd

even profit from nicer error messages as is currently the case for

negative literal equalities.

See the Note [Refutable shapes] in TmOracle for a place to start.

</pre>

</li>

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<h4>4 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#bd37d71fa68b0980d832d992b427fd6a6bdb891d">

compiler/deSugar/Check.hs

</a>

</li>

<li class="file-stats">

<a href="#7589abbc710cc40f6e48245c2bc16d69f556b714">

compiler/deSugar/PmExpr.hs

</a>

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<li class="file-stats">

<a href="#379674a5063221cec43f0f659c2eb67b30339f45">

compiler/deSugar/TmOracle.hs

</a>

</li>

<li class="file-stats">

<a href="#2cbc08c5f3b1dcbc9c763a836b51491224c05e50">

compiler/utils/ListSetOps.hs

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="bd37d71fa68b0980d832d992b427fd6a6bdb891d">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/0e1b15dbd63928d9edbf336189f037abaa3876cf#bd37d71fa68b0980d832d992b427fd6a6bdb891d"><strong>compiler/deSugar/Check.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1672,11 +1672,6 @@ mkGuard pv e = do</td>

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<pre style="margin: 0;"> <span id="LC1672" class="line" lang="haskell">     <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">{}</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">PmFake</span></span>

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<pre style="margin: 0;"> <span id="LC1673" class="line" lang="haskell">     <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>              <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmGrd</span> <span class="n" style="color: #333;">pv</span> <span class="n" style="color: #333;">expr</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC1674" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC1675" class="line" lang="haskell"><span class="cd">-- | Create a term equality of the form: `(False ~ (x ~ lit))`</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1676" class="line" lang="haskell"><span class="n" style="color: #333;">mkNegEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC1677" class="line" lang="haskell"><span class="n" style="color: #333;">mkNegEq</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">falsePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="p">`</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span><span class="p">`</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC1678" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE mkNegEq #-}</span></span>

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<pre style="margin: 0;">-<span id="LC1679" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC1675" class="line" lang="haskell"><span class="cd">-- | Create a term equality of the form: `(x ~ lit)`</span></span>

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<pre style="margin: 0;"> <span id="LC1676" class="line" lang="haskell"><span class="n" style="color: #333;">mkPosEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span></span>

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<pre style="margin: 0;"> <span id="LC1677" class="line" lang="haskell"><span class="n" style="color: #333;">mkPosEq</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">x</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -2116,7 +2111,8 @@ pmcheckHd (p@(PmLit l)) ps guards (PmVar x) (ValVec vva delta)</td>

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<pre style="margin: 0;"> <span id="LC2111" class="line" lang="haskell">                             <span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="n" style="color: #333;">vva</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span> <span class="p">{</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm_state</span><span class="p">})</span></span>

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2117

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2112

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<pre style="margin: 0;"> <span id="LC2112" class="line" lang="haskell">          <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>       <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">mempty</span></span>

</pre>

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2118

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<td class="diff-line-num new_line" data-linenumber="2113" 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">

2113

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<pre style="margin: 0;"> <span id="LC2113" 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 old_line" data-linenumber="2119" 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">

2119

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<td class="diff-line-num new_line old" data-linenumber="2114" 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="LC2119" class="line" lang="haskell">    <span class="n" style="color: #333;">us</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;">tm_state</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">solveOneEq</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">mkNegEq</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2120" 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="2114" 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">

2114

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<pre style="margin: 0;">+<span id="LC2114" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Refutable shapes] in TmOracle</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2115" 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">

2115

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<pre style="margin: 0;">+<span id="LC2115" class="line" lang="haskell">    <span class="n" style="color: #333;">us</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;">tm_state</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addSolveRefutableAltCon</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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2120

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<td class="diff-line-num new_line" data-linenumber="2116" 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">

2116

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<pre style="margin: 0;"> <span id="LC2116" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmNLit</span> <span class="n" style="color: #333;">x</span> <span class="p">[</span><span class="n" style="color: #333;">l</span><span class="p">]</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">vva</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span> <span class="p">{</span> <span class="n" style="color: #333;">delta_tm_cs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm_state</span> <span class="p">})]</span></span>

</pre>

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2121

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<td class="diff-line-num new_line" data-linenumber="2117" 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">

2117

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<pre style="margin: 0;"> <span id="LC2117" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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2122

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<td class="diff-line-num new_line" data-linenumber="2118" 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">

2118

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<pre style="margin: 0;"> <span id="LC2118" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2136" 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="2132" 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">@@ -2136,7 +2132,8 @@ pmcheckHd (p@(PmLit l)) ps guards</td>

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2136

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2132

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<pre style="margin: 0;"> <span id="LC2132" class="line" lang="haskell">                <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="n" style="color: #333;">vva</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span> <span class="p">{</span> <span class="n" style="color: #333;">delta_tm_cs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm_state</span> <span class="p">}))</span></span>

</pre>

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2137

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<td class="diff-line-num new_line" data-linenumber="2133" 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">

2133

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<pre style="margin: 0;"> <span id="LC2133" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">non_matched</span></span>

</pre>

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2138

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<td class="diff-line-num new_line" data-linenumber="2134" 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">

2134

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<pre style="margin: 0;"> <span id="LC2134" 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 old_line" data-linenumber="2139" 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">

2139

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<td class="diff-line-num new_line old" data-linenumber="2135" 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="LC2139" class="line" lang="haskell">    <span class="n" style="color: #333;">us</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;">tm_state</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">solveOneEq</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">mkNegEq</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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2135

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<pre style="margin: 0;">+<span id="LC2135" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Refutable shapes] in TmOracle</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2136" 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">

2136

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<pre style="margin: 0;">+<span id="LC2136" class="line" lang="haskell">    <span class="n" style="color: #333;">us</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;">tm_state</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">addSolveRefutableAltCon</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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2140

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<pre style="margin: 0;"> <span id="LC2137" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmNLit</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">vva</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">delta</span> <span class="p">{</span> <span class="n" style="color: #333;">delta_tm_cs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tm_state</span> <span class="p">})]</span></span>

</pre>

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2138

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<pre style="margin: 0;"> <span id="LC2138" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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2142

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2139

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<pre style="margin: 0;"> <span id="LC2139" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2478" 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="2475" 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">@@ -2478,9 +2475,9 @@ isAnyPmCheckEnabled dflags (DsMatchContext kind _loc)</td>

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<pre style="margin: 0;"> <span id="LC2475" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2476" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC2477" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="n" style="color: #333;">vva</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2481" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">re<span class="idiff left right">sidual_eq</span>s</span><span class="p">,</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrapUpTmState</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2482" class="line" lang="haskell">          <span class="n" style="color: #333;">vector</span>          <span class="idiff left right">      </span><span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substInValAbs</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">vva</span></span>

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<pre style="margin: 0;">-<span id="LC2483" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">in</span>  <span class="n" style="color: #333;">ppr_uncovered</span> <span class="p">(</span><span class="n" style="color: #333;">vector</span><span class="p">,</span> <span class="n" style="color: #333;">re<span class="idiff left right">sidual_eq</span>s</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC2478" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">re<span class="idiff left right">fut</span>s</span><span class="p">,</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">wrapUpTmState</span> <span class="p">(</span><span class="n" style="color: #333;">delta_tm_cs</span> <span class="n" style="color: #333;">delta</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2484" 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="LC2479" class="line" lang="haskell">          <span class="n" style="color: #333;">vector</span>          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substInValAbs</span> <span class="n" style="color: #333;">subst</span> <span class="n" style="color: #333;">vva</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="2480" 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="LC2480" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">in</span>  <span class="n" style="color: #333;">ppr_uncovered</span> <span class="p">(</span><span class="n" style="color: #333;">vector</span><span class="p">,</span> <span class="n" style="color: #333;">re<span class="idiff left right">fut</span>s</span><span class="p">)</span></span>

</pre>

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2481

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<pre style="margin: 0;"> <span id="LC2481" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2482" class="line" lang="haskell"><span class="cd">-- | Apply a term substitution to a value vector abstraction. All VAs are</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2483" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- transformed to PmExpr (used only before pretty printing).</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2490" 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="2487" 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">@@ -2490,8 +2487,8 @@ substInValAbs subst = map (exprDeepLookup subst . vaToPmExpr)</td>

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<pre style="margin: 0;"> <span id="LC2487" class="line" lang="haskell"><span class="cd">-- | Wrap up the term oracle's state once solving is complete. Drop any</span></span>

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<pre style="margin: 0;"> <span id="LC2488" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- information about unhandled constraints (involving HsExprs) and flatten</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="2489" 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="LC2489" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (height 1) the substitution.</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2490" 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="LC2493" class="line" lang="haskell"><span class="n" style="color: #333;">wrapUpTmState</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(<span class="idiff left">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ComplexEq</span></span><span class="p"><span class="idiff right">]</span>,</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2490" 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="LC2494" class="line" lang="haskell"><span class="n" style="color: #333;">wrapUpTmState</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">residual</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">subst</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff right">residual</span></span><span class="p">,</span> <span class="n" style="color: #333;">flattenPmVarEnv</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span></span>

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<td class="diff-line-num new old_line" data-linenumber="2495" 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="LC2490" class="line" lang="haskell"><span class="n" style="color: #333;">wrapUpTmState</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">PmRefutEnv</span></span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC2491" class="line" lang="haskell"><span class="n" style="color: #333;">wrapUpTmState</span> <span class="p">(</span><span class="kr" style="font-weight: 600;"><span class="idiff left">_</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">subst</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">refuts</span></span><span class="p"><span class="idiff">))</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">,</span> <span class="n" style="color: #333;">flattenPmVarEnv</span> <span class="n" style="color: #333;">subst</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2492" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2496" 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="LC2493" class="line" lang="haskell"><span class="cd">-- | Issue all the warnings (coverage, exhaustiveness, inaccessibility)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2494" class="line" lang="haskell"><span class="n" style="color: #333;">dsPmWarn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DynFlags</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2640" 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="2637" 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">@@ -2640,18 +2637,21 @@ ppr_pats kind pats</td>

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<pre style="margin: 0;"> <span id="LC2637" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_eqn</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsMatchContext</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">LPat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;"> <span id="LC2638" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_eqn</span> <span class="n" style="color: #333;">prefixF</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">eqn</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">prefixF</span> <span class="p">(</span><span class="n" style="color: #333;">ppr_pats</span> <span class="n" style="color: #333;">kind</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">unLoc</span> <span class="n" style="color: #333;">eqn</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC2639" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC2643" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_constraint</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,[</span><span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">])</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;">-<span id="LC2644" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_constraint</span> <span class="p">(</span><span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"is not one of"</span></span>

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<td class="diff-line-num old old_line" data-linenumber="2645" 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">

2645

</td>

<td class="diff-line-num new_line old" data-linenumber="2640" 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="LC2645" class="line" lang="haskell">                                 <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">braces</span> <span class="p">(</span><span class="n" style="color: #333;">pprWithCommas</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2646" 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="2640" 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">

2640

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<pre style="margin: 0;">+<span id="LC2640" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_constraint</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,[</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">])</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2646" 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="2641" 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">

2641

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<pre style="margin: 0;">+<span id="LC2641" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_constraint</span> <span class="p">(</span><span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2646" 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="2642" 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">

2642

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<pre style="margin: 0;">+<span id="LC2642" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"is not one of"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">braces</span> <span class="p">(</span><span class="n" style="color: #333;">pprWithCommas</span> <span class="n" style="color: #333;">ppr_alt</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2646" 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="2643" 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">

2643

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<pre style="margin: 0;">+<span id="LC2643" 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="2646" 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="2644" 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">

2644

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<pre style="margin: 0;">+<span id="LC2644" class="line" lang="haskell">    <span class="n" style="color: #333;">ppr_alt</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span>      <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">lit</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2646" 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="2645" 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">

2645

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<pre style="margin: 0;">+<span id="LC2645" class="line" lang="haskell">    <span class="n" style="color: #333;">ppr_alt</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</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;">ppr</span> <span class="n" style="color: #333;">cl</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2646" 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">

2646

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<td class="diff-line-num new_line" data-linenumber="2646" 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">

2646

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<pre style="margin: 0;"> <span id="LC2646" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2647" 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">

2647

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<td class="diff-line-num new_line old" data-linenumber="2647" 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="LC2647" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_uncovered</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">],</span> <span class="p"><span class="idiff left">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ComplexEq</span></span><span class="p"><span class="idiff right">]</span>)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2648" 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">

2648

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<td class="diff-line-num new_line old" data-linenumber="2647" 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="LC2648" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_uncovered</span> <span class="p">(</span><span class="n" style="color: #333;">expr_vec</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">complex</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2649" 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="2647" 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">

2647

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<pre style="margin: 0;">+<span id="LC2647" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_uncovered</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">PmRefutEnv</span></span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2649" 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="2648" 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">

2648

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<pre style="margin: 0;">+<span id="LC2648" class="line" lang="haskell"><span class="n" style="color: #333;">ppr_uncovered</span> <span class="p">(</span><span class="n" style="color: #333;">expr_vec</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">refuts</span></span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2649" 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">

2649

</td>

<td class="diff-line-num new_line" data-linenumber="2649" 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">

2649

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<pre style="margin: 0;"> <span id="LC2649" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">cs</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fsep</span> <span class="n" style="color: #333;">vec</span> <span class="c1" style="color: #998; font-style: italic;">-- there are no literal constraints</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2650" 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">

2650

</td>

<td class="diff-line-num new_line" data-linenumber="2650" 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">

2650

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<pre style="margin: 0;"> <span id="LC2650" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">fsep</span> <span class="n" style="color: #333;">vec</span><span class="p">)</span> <span class="mi" style="color: #099;">4</span> <span class="o" style="font-weight: 600;">$</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2651" 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">

2651

</td>

<td class="diff-line-num new_line" data-linenumber="2651" 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">

2651

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<pre style="margin: 0;"> <span id="LC2651" class="line" lang="haskell">                  <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"where"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">vcat</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr_constraint</span> <span class="n" style="color: #333;">cs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2652" 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">

2652

</td>

<td class="diff-line-num new_line" data-linenumber="2652" 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">

2652

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<pre style="margin: 0;"> <span id="LC2652" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

</td>

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<pre style="margin: 0;"> <span id="LC2653" class="line" lang="haskell">    <span class="n" style="color: #333;">sdoc_vec</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">expr_vec</span></span>

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<pre style="margin: 0;">-<span id="LC2654" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">vec</span><span class="p">,</span><span class="n" style="color: #333;">cs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runPmPprM</span> <span class="n" style="color: #333;">sdoc_vec</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">filterComplex</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">complex</span></span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC2654" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">vec</span><span class="p">,</span><span class="n" style="color: #333;">cs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runPmPprM</span> <span class="n" style="color: #333;">sdoc_vec</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">prepareRefuts</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC2655" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC2656" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Representation of Term Equalities]</span></span>

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<pre style="margin: 0;"> <span id="LC2657" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<br>

</li>

<li id="7589abbc710cc40f6e48245c2bc16d69f556b714">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/0e1b15dbd63928d9edbf336189f037abaa3876cf#7589abbc710cc40f6e48245c2bc16d69f556b714"><strong>compiler/deSugar/PmExpr.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="8" 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="8" 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">@@ -8,10 +8,9 @@ Haskell expressions (as used by the pattern matching checker) and utilities.</td>

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<pre style="margin: 0;"> <span id="LC8" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ViewPatterns #-}</span></span>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">PmExpr</span> <span class="p">(</span></span>

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<pre style="margin: 0;">-<span id="LC11" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">SimpleEq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">toComplex</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">eqPmLit</span><span class="p">,</span></span>

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">truePmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">falsePmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isTruePmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isFalsePmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isNotPmExprOther</span><span class="p">,</span></span>

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">lhsExprToPmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hsExprToPmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">substComplexEq</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">filterComplex</span><span class="p">,</span></span>

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">pprPmExprWithParens</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">runPmPprM</span></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">SimpleEq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">toComplex</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">eqPmLit</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">isNotPmExprOther</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lhsExprToPmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">hsExprToPmExpr</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">substComplexEq</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">prepareRefuts</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprPmExprWithParens</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">runPmPprM</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="15" 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="14" 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="LC14" class="line" lang="haskell">    <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<td class="diff-line-num old_line" data-linenumber="16" 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="15" 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="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"HsVersions.h"</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="26" 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>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -26,14 +25,13 @@ import Name</td>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">NameSet</span></span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">DataCon</span></span>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ConLike</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TcType</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">isStringTy</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TcType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Type</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">isStringTy</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TysWiredIn</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Util</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="32" 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="LC32" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">SrcLoc</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="35" 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="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Maybe</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">mapMaybe</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="35" 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="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">groupBy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">sortBy</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">nubBy</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="37" 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="35" 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="LC35" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Trans.State.Lazy</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="38" 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="36" 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="LC36" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

</pre>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -61,7 +59,6 @@ refer to variables that are otherwise substituted away.</td>

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<pre style="margin: 0;"> <span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span>   <span class="kt" style="color: #458; font-weight: 600;">Name</span></span>

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span>   <span class="kt" style="color: #458; font-weight: 600;">ConLike</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span>   <span class="kt" style="color: #458; font-weight: 600;">PmLit</span></span>

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<pre style="margin: 0;">-<span id="LC64" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span>    <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span>  <span class="c1" style="color: #998; font-style: italic;">-- Syntactic equality</span></span>

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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">HsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span>  <span class="c1" style="color: #998; font-style: italic;">-- Note [PmExprOther in PmExpr]</span></span>

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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="79" 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="76" 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">@@ -79,6 +76,35 @@ eqPmLit (PmOLit b1 l1) (PmOLit b2 l2) = b1 == b2 && l1 == l2</td>

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<pre style="margin: 0;"> <span id="LC76" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- See Note [Undecidable Equality for Overloaded Literals]</span></span>

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="n" style="color: #333;">eqPmLit</span> <span class="kr" style="font-weight: 600;">_</span>              <span class="kr" style="font-weight: 600;">_</span>              <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC79" class="line" lang="haskell"><span class="cd">-- | Represents a match against a 'ConLike' or literal. We mostly use it to</span></span>

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<pre style="margin: 0;">+<span id="LC80" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- to encode shapes for a variable that immediately lead to a refutation.</span></span>

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<pre style="margin: 0;">+<span id="LC81" 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="LC82" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Refutable shapes] in TmOracle.</span></span>

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<pre style="margin: 0;">+<span id="LC83" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Type</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC84" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- ^ The types are the argument types of the 'ConLike' application</span></span>

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<pre style="margin: 0;">+<span id="LC85" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span>     <span class="kt" style="color: #458; font-weight: 600;">PmLit</span></span>

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<pre style="margin: 0;">+<span id="LC86" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC87" class="line" lang="haskell"><span class="cd">-- | This instance won't compare the argument types of the 'ConLike', as we</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC88" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- carry them for recovering COMPLETE match groups only. The 'PmRefutEnv' below</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC89" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- should never have different 'PmAltConLike's with the same 'ConLike' for the</span></span>

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<pre style="margin: 0;">+<span id="LC90" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- same variable. See Note [Refutable shapes] in TmOracle.</span></span>

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<pre style="margin: 0;">+<span id="LC91" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl1</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;">PmAltConLike</span> <span class="n" style="color: #333;">cl2</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cl1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">cl2</span></span>

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<pre style="margin: 0;">+<span id="LC93" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l1</span>        <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l2</span>        <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">eqPmLit</span> <span class="n" style="color: #333;">l1</span> <span class="n" style="color: #333;">l2</span></span>

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<pre style="margin: 0;">+<span id="LC94" 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;">_</span>                  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;">+<span id="LC95" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC96" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC97" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</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;">ppr</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'@'</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>

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<pre style="margin: 0;">+<span id="LC98" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span>          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">l</span></span>

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<pre style="margin: 0;">+<span id="LC99" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC100" class="line" lang="haskell"><span class="cd">-- | An environment assigning shapes to variables that immediately lead to a</span></span>

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<pre style="margin: 0;">+<span id="LC101" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- refutation. So, if @x ≁ Just [Bool] ∈ env@, then trying to solve a</span></span>

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<pre style="margin: 0;">+<span id="LC102" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'ComplexEq' like @x ~ Just False@ immediately leads to a contradiction.</span></span>

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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Determinism is important since we use this for warning messages.</span></span>

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<pre style="margin: 0;">+<span id="LC104" 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="LC105" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Refutable shapes] in TmOracle.</span></span>

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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">])]</span></span>

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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC108" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Undecidable Equality for Overloaded Literals]</span></span>

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

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<td class="diff-line-num new_line" data-linenumber="110" 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="LC110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Equality on overloaded literals is undecidable in the general case. Consider</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="171" 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">@@ -145,9 +171,6 @@ impact of this is the following:</td>

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">       appearance of the warnings and is, in practice safe.</span></span>

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<pre style="margin: 0;"> <span id="LC172" 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="LC173" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC148" class="line" lang="haskell"><span class="n" style="color: #333;">nubPmLit</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC149" class="line" lang="haskell"><span class="n" style="color: #333;">nubPmLit</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">nubBy</span> <span class="n" style="color: #333;">eqPmLit</span></span>

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<pre style="margin: 0;">-<span id="LC150" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell"><span class="cd">-- | Term equalities</span></span>

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<pre style="margin: 0;"> <span id="LC175" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">SimpleEq</span>  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Id</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- We always use this orientation</span></span>

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<pre style="margin: 0;"> <span id="LC176" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">)</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="179" 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">@@ -156,14 +179,6 @@ type ComplexEq = (PmExpr, PmExpr)</td>

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="n" style="color: #333;">toComplex</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SimpleEq</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="157" 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="LC180" class="line" lang="haskell"><span class="n" style="color: #333;">toComplex</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">x</span><span class="p">),</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="158" 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">

158

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<td class="diff-line-num new_line" data-linenumber="181" 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">

181

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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="159" 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="182" 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="LC159" class="line" lang="haskell"><span class="cd">-- | Expression `True'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="160" 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="LC160" class="line" lang="haskell"><span class="n" style="color: #333;">truePmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span></span>

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<td class="diff-line-num old old_line" data-linenumber="161" 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="182" 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="LC161" class="line" lang="haskell"><span class="n" style="color: #333;">truePmExpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPmExprData</span> <span class="n" style="color: #333;">trueDataCon</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="162" 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="LC162" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="163" 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="LC163" class="line" lang="haskell"><span class="cd">-- | Expression `False'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="164" 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="LC164" class="line" lang="haskell"><span class="n" style="color: #333;">falsePmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="165" 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="LC165" class="line" lang="haskell"><span class="n" style="color: #333;">falsePmExpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkPmExprData</span> <span class="n" style="color: #333;">falseDataCon</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC166" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="167" 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="LC182" 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="168" 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="LC183" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ** Predicates on PmExpr</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="169" 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="184" 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">

184

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="177" 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="192" 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">@@ -177,29 +192,11 @@ isNegatedPmLit :: PmLit -> Bool</td>

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<td class="diff-line-num new_line" data-linenumber="192" 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="LC192" class="line" lang="haskell"><span class="n" style="color: #333;">isNegatedPmLit</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmOLit</span> <span class="n" style="color: #333;">b</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;">b</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="193" 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="LC193" class="line" lang="haskell"><span class="n" style="color: #333;">isNegatedPmLit</span> <span class="n" style="color: #333;">_other_lit</span>   <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="179" 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="194" 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="LC194" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="180" 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="LC180" class="line" lang="haskell"><span class="cd">-- | Check whether a PmExpr is syntactically equal to term `True'.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC181" class="line" lang="haskell"><span class="n" style="color: #333;">isTruePmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">-<span id="LC182" class="line" lang="haskell"><span class="n" style="color: #333;">isTruePmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">trueDataCon</span></span>

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<pre style="margin: 0;">-<span id="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">isTruePmExpr</span> <span class="n" style="color: #333;">_other_expr</span>      <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;">-<span id="LC184" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC185" class="line" lang="haskell"><span class="cd">-- | Check whether a PmExpr is syntactically equal to term `False'.</span></span>

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<pre style="margin: 0;">-<span id="LC186" class="line" lang="haskell"><span class="n" style="color: #333;">isFalsePmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">-<span id="LC187" class="line" lang="haskell"><span class="n" style="color: #333;">isFalsePmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">falseDataCon</span></span>

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<pre style="margin: 0;">-<span id="LC188" class="line" lang="haskell"><span class="n" style="color: #333;">isFalsePmExpr</span> <span class="n" style="color: #333;">_other_expr</span>      <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC189" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell"><span class="cd">-- | Check whether a PmExpr is syntactically e</span></span>

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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"><span class="n" style="color: #333;">isNilPmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"><span class="n" style="color: #333;">isNilPmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</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;">c</span> <span class="o" style="font-weight: 600;">==</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">nilDataCon</span></span>

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<pre style="margin: 0;"> <span id="LC198" class="line" lang="haskell"><span class="n" style="color: #333;">isNilPmExpr</span> <span class="n" style="color: #333;">_other_expr</span>     <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;"> <span id="LC199" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC195" class="line" lang="haskell"><span class="cd">-- | Check whether a PmExpr is syntactically equal to (x == y).</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC196" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Since (==) is overloaded and can have an arbitrary implementation, we use</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC197" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the PmExprEq constructor to represent only equalities with non-overloaded</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC198" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- literals where it coincides with a syntactic equality check.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC199" class="line" lang="haskell"><span class="n" style="color: #333;">isPmExprEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC200" class="line" lang="haskell"><span class="n" style="color: #333;">isPmExprEq</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span><span class="p">)</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;">e1</span><span class="p">,</span><span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC201" class="line" lang="haskell"><span class="n" style="color: #333;">isPmExprEq</span> <span class="n" style="color: #333;">_other_expr</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="LC202" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC200" class="line" lang="haskell"><span class="cd">-- | Check if a DataCon is (:).</span></span>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="haskell"><span class="n" style="color: #333;">isConsDataCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;"> <span id="LC202" class="line" lang="haskell"><span class="n" style="color: #333;">isConsDataCon</span> <span class="n" style="color: #333;">con</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">consDataCon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">con</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -216,9 +213,6 @@ substPmExpr x e1 e =</td>

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell">                <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">ps</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">ps'</span><span class="p">,</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapAndUnzip</span> <span class="p">(</span><span class="n" style="color: #333;">substPmExpr</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e1</span><span class="p">)</span> <span class="n" style="color: #333;">ps</span></span>

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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell">                      <span class="kr" style="font-weight: 600;">in</span>  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">ps'</span><span class="p">,</span> <span class="n" style="color: #333;">or</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC219" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">ex</span> <span class="n" style="color: #333;">ey</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">ex'</span><span class="p">,</span> <span class="n" style="color: #333;">bx</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substPmExpr</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">ex</span></span>

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<pre style="margin: 0;">-<span id="LC220" class="line" lang="haskell">                          <span class="p">(</span><span class="n" style="color: #333;">ey'</span><span class="p">,</span> <span class="n" style="color: #333;">by</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">substPmExpr</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">ey</span></span>

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<pre style="margin: 0;">-<span id="LC221" class="line" lang="haskell">                      <span class="kr" style="font-weight: 600;">in</span>  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">ex'</span> <span class="n" style="color: #333;">ey'</span><span class="p">,</span> <span class="n" style="color: #333;">bx</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">by</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell">    <span class="n" style="color: #333;">_other_expr</span>    <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- The rest are terminals (We silently ignore</span></span>

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<pre style="margin: 0;"> <span id="LC217" class="line" lang="haskell">                                 <span class="c1" style="color: #998; font-style: italic;">-- Other). See Note [PmExprOther in PmExpr]</span></span>

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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -341,28 +335,15 @@ Check.hs) to be more precice.</td>

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<pre style="margin: 0;"> <span id="LC335" 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="LC336" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC337" 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="LC344" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ** Transform re<span class="idiff left right">sidual constraint</span>s in appropriate form for pretty printing</span></span>

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<pre style="margin: 0;">+<span id="LC338" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ** Transform re<span class="idiff left right">futation</span>s in appropriate form for pretty printing</span></span>

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<pre style="margin: 0;"> <span id="LC339" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC346" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">PmNegLitCt</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Pm<span class="idiff left right">Lit</span></span><span class="p">]))</span></span>

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<pre style="margin: 0;">+<span id="LC340" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">PmNegLitCt</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Pm<span class="idiff left right">AltCon</span></span><span class="p">]))</span></span>

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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC348" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">filterComplex</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ComplexEq</span></span><span class="p"><span class="idiff">]</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmNegLitCt</span></span><span class="p"><span class="idiff right">]</span></span></span>

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<pre style="margin: 0;">-<span id="LC349" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">filterComplex</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">zipWith</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rename</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">nameList</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">map</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mkGroup</span></span></span>

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<pre style="margin: 0;">-<span id="LC350" class="line" lang="haskell"><span class="idiff left">              </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">groupBy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">name</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">sortBy</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">order</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mapMaybe</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">isNegLitCs</span></span></span>

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<pre style="margin: 0;">+<span id="LC342" class="line" lang="haskell"><span class="cd"><span class="idiff left right">-- | Call this on a list of negative equalities</span></span></span>

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<pre style="margin: 0;">+<span id="LC343" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">prepareRefuts</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmRefutEnv</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmNegLitCt</span></span><span class="p"><span class="idiff right">]</span></span></span>

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<pre style="margin: 0;">+<span id="LC344" class="line" lang="haskell"><span class="n" style="color: #333;"><span class="idiff left">prepareRefuts</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">zipWith</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rename</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">nameList</span></span></span>

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<pre style="margin: 0;"> <span id="LC345" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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352

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<pre style="margin: 0;">-<span id="LC352" class="line" lang="haskell">    <span class="n" style="color: #333;">order</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">compare</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">y</span><span class="p">)</span></span>

</pre>

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353

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<pre style="margin: 0;">-<span id="LC353" class="line" lang="haskell">    <span class="n" style="color: #333;">name</span>  <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC354" class="line" lang="haskell">    <span class="n" style="color: #333;">mkGroup</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="p">(</span><span class="n" style="color: #333;">head</span> <span class="n" style="color: #333;">l</span><span class="p">),</span> <span class="n" style="color: #333;">nubPmLit</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">snd</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="355" 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">

355

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<pre style="margin: 0;"> <span id="LC346" class="line" lang="haskell">    <span class="n" style="color: #333;">rename</span> <span class="n" style="color: #333;">new</span> <span class="p">(</span><span class="n" style="color: #333;">old</span><span class="p">,</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">old</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">new</span><span class="p">,</span> <span class="n" style="color: #333;">lits</span><span class="p">))</span></span>

</pre>

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356

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<pre style="margin: 0;">-<span id="LC356" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC357" class="line" lang="haskell">    <span class="n" style="color: #333;">isNegLitCs</span> <span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span><span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="358" 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="LC358" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFalsePmExpr</span> <span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isPmExprEq</span> <span class="n" style="color: #333;">e2</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isNegLitCs'</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="359" 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">

359

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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;">isFalsePmExpr</span> <span class="n" style="color: #333;">e2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span><span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">isPmExprEq</span> <span class="n" style="color: #333;">e1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isNegLitCs'</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="360" 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">

360

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<td class="diff-line-num new_line old" data-linenumber="347" 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="LC360" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</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 old old_line" data-linenumber="361" 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="347" 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="LC361" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="362" 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="LC362" class="line" lang="haskell">    <span class="n" style="color: #333;">isNegLitCs'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</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;">x</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

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363

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<pre style="margin: 0;">-<span id="LC363" class="line" lang="haskell">    <span class="n" style="color: #333;">isNegLitCs'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</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;">x</span><span class="p">,</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="364" 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="347" 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="LC364" class="line" lang="haskell">    <span class="n" style="color: #333;">isNegLitCs'</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span>             <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="365" 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="347" 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="LC365" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="366" 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="LC347" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Try nice names p,q,r,s,t before using the (ugly) t_i</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell">    <span class="n" style="color: #333;">nameList</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell">    <span class="n" style="color: #333;">nameList</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">text</span> <span class="p">[</span><span class="s" style="color: #d14;">"p"</span><span class="p">,</span><span class="s" style="color: #d14;">"q"</span><span class="p">,</span><span class="s" style="color: #d14;">"r"</span><span class="p">,</span><span class="s" style="color: #d14;">"s"</span><span class="p">,</span><span class="s" style="color: #d14;">"t"</span><span class="p">]</span> <span class="o" style="font-weight: 600;">++</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="370" 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="351" 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">@@ -370,7 +351,7 @@ filterComplex = zipWith rename nameList . map mkGroup</td>

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

</pre>

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<pre style="margin: 0;"> <span id="LC352" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ----------------------------------------------------------------------------</span></span>

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<td class="diff-line-num new_line" data-linenumber="353" 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="LC353" class="line" lang="haskell"></span>

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<td class="diff-line-num old old_line" data-linenumber="373" 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="354" 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="LC373" class="line" lang="haskell"><span class="n" style="color: #333;">runPmPprM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmNegLitCt</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,[</span><span class="kt" style="color: #458; font-weight: 600;">Pm<span class="idiff left right">Lit</span></span><span class="p">])])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="374" 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="354" 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="LC354" class="line" lang="haskell"><span class="n" style="color: #333;">runPmPprM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmNegLitCt</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="p">,</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">,[</span><span class="kt" style="color: #458; font-weight: 600;">Pm<span class="idiff left right">AltCon</span></span><span class="p">])])</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="355" 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="LC355" class="line" lang="haskell"><span class="n" style="color: #333;">runPmPprM</span> <span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">lit_env</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">result</span><span class="p">,</span> <span class="n" style="color: #333;">mapMaybe</span> <span class="n" style="color: #333;">is_used</span> <span class="n" style="color: #333;">lit_env</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="375" 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="356" 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="LC356" 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="376" 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="357" 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="LC357" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">result</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">_lit_env</span><span class="p">,</span> <span class="n" style="color: #333;">used</span><span class="p">))</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">runState</span> <span class="n" style="color: #333;">m</span> <span class="p">(</span><span class="n" style="color: #333;">lit_env</span><span class="p">,</span> <span class="n" style="color: #333;">emptyNameSet</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="404" 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="385" 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">@@ -404,13 +385,11 @@ pprPmExpr (PmExprVar x) = do</td>

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<pre style="margin: 0;"> <span id="LC385" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="405" 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="386" 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="LC386" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">con</span> <span class="n" style="color: #333;">args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPmExprCon</span> <span class="n" style="color: #333;">con</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<td class="diff-line-num old_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">

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<td class="diff-line-num new_line" data-linenumber="387" 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="LC387" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span>        <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="407" 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="388" 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="LC407" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="kr" style="font-weight: 600;">_</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;">return</span> <span class="n" style="color: #333;">underscore</span> <span class="c1" style="color: #998; font-style: italic;">-- don't show</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC388" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</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;">return</span> <span class="n" style="color: #333;">underscore</span> <span class="c1" style="color: #998; font-style: italic;">-- don't show</span></span>

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

</pre>

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<td class="diff-line-num old_line" data-linenumber="410" 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="390" 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="LC390" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<td class="diff-line-num old_line" data-linenumber="411" 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">

411

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<td class="diff-line-num new_line" data-linenumber="391" 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="LC391" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span>   <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<td class="diff-line-num old_line" data-linenumber="412" 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="392" 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="LC392" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span>    <span class="n" style="color: #333;">l</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isNegatedPmLit</span> <span class="n" style="color: #333;">l</span></span>

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<td class="diff-line-num new_line old" data-linenumber="393" 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="LC413" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span>    <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="c1" style="color: #998; font-style: italic;">-- will become a wildcard</span></span>

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<pre style="margin: 0;"> <span id="LC393" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="c1" style="color: #998; font-style: italic;">-- will become a wildcard</span></span>

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<td class="diff-line-num new_line" data-linenumber="394" 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="LC394" class="line" lang="haskell"><span class="n" style="color: #333;">needsParens</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">c</span><span class="p">)</span> <span class="n" style="color: #333;">es</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC395" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTupleDataCon</span> <span class="n" style="color: #333;">c</span></span>

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<br>

</li>

<li id="379674a5063221cec43f0f659c2eb67b30339f45">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/0e1b15dbd63928d9edbf336189f037abaa3876cf#379674a5063221cec43f0f659c2eb67b30339f45"><strong>compiler/deSugar/TmOracle.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="9" 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="9" 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">@@ -9,12 +9,13 @@ The term equality oracle. The main export of the module is function `tmOracle'.</td>

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">TmOracle</span> <span class="p">(</span></span>

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- re-exported from PmExpr</span></span>

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">SimpleEq</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ComplexEq</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">PmVarEnv</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">falsePmExpr</span></span><span class="p">,</span></span>

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<td class="diff-line-num new_line old" data-linenumber="12" 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="LC13" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left">eqPmLit</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">filterComplex</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">isNotPmExprOther</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">runPmPprM</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">lhsExprToPmExp</span>r</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="12" 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="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">hsExprToPmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprPmExprWithParens</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">PmAltCon</span></span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff">),</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">SimpleEq</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">ComplexEq</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">PmVarEnv</span></span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="15" 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="13" 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="LC13" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">PmRefutEnv</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">eqPmLit</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">prepareRefuts</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">isNotPmExprOthe</span>r</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="15" 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="14" 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="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;"><span class="idiff left">runPmPprM</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">lhsExprToPmExpr</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff right"> </span><span class="nf" style="color: #900; font-weight: 600;">hsExprToPmExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pprPmExprWithParens</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="15" 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="15" 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="LC15" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="16" 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="LC16" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- the term oracle</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="17" 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="LC17" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">tmOracle</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">initialTmState</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">solveOneEq</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">extendSubst</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">canDiverge</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">addSolveRefutableAltCon</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lookupRefutableAltCons</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="19" 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="LC19" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- misc.</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="21" 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="LC21" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">toComplex</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">exprDeepLookup</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">pmLitType</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">flattenPmVarEnv</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="32" 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="33" 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">@@ -32,7 +33,9 @@ import Type</td>

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">HsLit</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">TcHsSyn</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC35" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">MonadUtils</span></span>

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">ListSetOps</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">assocAlter</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">insertNoDup</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC37" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Util</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="38" 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="LC38" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC39" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC40" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">NameEnv</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -50,16 +53,20 @@ type PmVarEnv = NameEnv PmExpr</td>

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="cd">-- | The environment of the oracle contains</span></span>

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     1. A Bool (are there any constraints we cannot handle? (PmExprOther)).</span></span>

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<pre style="margin: 0;">-<span id="LC53" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     2. A substitution we extend with every step and return as a result.</span></span>

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<pre style="margin: 0;">-<span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">TmOracleEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     2. A substitution with solutions we extend with every step and return</span></span>

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<pre style="margin: 0;">+<span id="LC57" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--        as a result.</span></span>

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<pre style="margin: 0;">+<span id="LC58" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     3. A 'PmRefutEnv' assigning shapes to variables that immediately lead to</span></span>

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<pre style="margin: 0;">+<span id="LC59" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--        a refutation. See Note [Refutable shapes].</span></span>

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<pre style="margin: 0;">+<span id="LC60" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">TmOracleEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC61" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell"><span class="cd">-- | Check whether a constraint (x ~ BOT) can succeed,</span></span>

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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- given the resulting state of the term oracle.</span></span>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">-<span id="LC59" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">_unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC65" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">_unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">_refuts</span></span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- If the variable seems not evaluated, there is a possibility for</span></span>

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<pre style="margin: 0;">-<span id="LC61" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- constraint x ~ BOT to be satisfiable.</span></span>

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<pre style="margin: 0;">-<span id="LC62" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="c1" style="color: #998; font-style: italic;">-- seems not forced</span></span>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- constraint x ~ BOT to be satisfiable. That's the case when we haven't found</span></span>

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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- a solution (i.e. some equivalent literal or constructor) for it yet.</span></span>

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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="c1" style="color: #998; font-style: italic;">-- seems not forced</span></span>

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<pre style="margin: 0;"> <span id="LC70" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- If it is involved (directly or indirectly) in any equality in the</span></span>

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<pre style="margin: 0;"> <span id="LC71" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- worklist, we can assume that it is already indirectly evaluated,</span></span>

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<pre style="margin: 0;"> <span id="LC72" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- as a side-effect of equality checking. If not, then we can assume</span></span>

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<pre style="margin: 0;"> <span id="LC85" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span>    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">y</span></span>

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<pre style="margin: 0;"> <span id="LC86" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">es</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">varIn</span><span class="p">`)</span> <span class="n" style="color: #333;">es</span></span>

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<pre style="margin: 0;"> <span id="LC87" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;">-<span id="LC81" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">varIn</span><span class="p">`</span> <span class="n" style="color: #333;">e1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">||</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="p">`</span><span class="n" style="color: #333;">varIn</span><span class="p">`</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="kr" style="font-weight: 600;">_</span>  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC90" class="line" lang="haskell"><span class="cd">-- | Check whether the equality @x ~ e@ leads to a refutation. Make sure that</span></span>

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<pre style="margin: 0;">+<span id="LC91" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @x@ and @e@ are completely substituted before!</span></span>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="haskell"><span class="n" style="color: #333;">isRefutable</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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<pre style="margin: 0;">+<span id="LC93" class="line" lang="haskell"><span class="n" style="color: #333;">isRefutable</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">env</span></span>

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<pre style="margin: 0;">+<span id="LC94" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fromMaybe</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">elem</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">exprToAlt</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;"><*></span> <span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">env</span></span>

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<pre style="margin: 0;">+<span id="LC95" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC96" class="line" lang="haskell"><span class="cd">-- | Flatten the DAG (Could be improved in terms of performance.).</span></span>

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<pre style="margin: 0;"> <span id="LC97" class="line" lang="haskell"><span class="n" style="color: #333;">flattenPmVarEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span></span>

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<pre style="margin: 0;"> <span id="LC98" class="line" lang="haskell"><span class="n" style="color: #333;">flattenPmVarEnv</span> <span class="n" style="color: #333;">env</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapNameEnv</span> <span class="p">(</span><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">env</span></span>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="103" 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">@@ -91,25 +103,52 @@ type TmState = ([ComplexEq], TmOracleEnv)</td>

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<pre style="margin: 0;"> <span id="LC103" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC104" class="line" lang="haskell"><span class="cd">-- | Initial state of the oracle.</span></span>

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<pre style="margin: 0;"> <span id="LC105" class="line" lang="haskell"><span class="n" style="color: #333;">initialTmState</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span></span>

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<pre style="margin: 0;">-<span id="LC94" class="line" lang="haskell"><span class="n" style="color: #333;">initialTmState</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</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;">False</span><span class="p">,</span> <span class="n" style="color: #333;">emptyNameEnv</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell"><span class="n" style="color: #333;">initialTmState</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</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;">False</span><span class="p">,</span> <span class="n" style="color: #333;">emptyNameEnv</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">[]</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="107" 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="LC107" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="96" 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="108" 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="LC108" class="line" lang="haskell"><span class="cd">-- | Solve a complex equality (top-level).</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="97" 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="109" 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="LC109" class="line" lang="haskell"><span class="n" style="color: #333;">solveOneEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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;">TmState</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC98" class="line" lang="haskell"><span class="n" style="color: #333;">solveOneEq</span> <span class="n" style="color: #333;">solver_env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="n" style="color: #333;">env</span><span class="p">))</span> <span class="n" style="color: #333;">complex</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="n" style="color: #333;">solveOneEq</span> <span class="n" style="color: #333;">solver_env</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><span class="p">))</span> <span class="n" style="color: #333;">complex</span></span>

</pre>

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99

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<td class="diff-line-num new_line" data-linenumber="111" 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">

111

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_env</span> <span class="c1" style="color: #998; font-style: italic;">-- do the actual *merging* with existing state</span></span>

</pre>

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100

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<pre style="margin: 0;">-<span id="LC100" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">simplifyComplexEq</span>               <span class="c1" style="color: #998; font-style: italic;">-- simplify as much as you can</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="101" 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">

101

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112

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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">applySubstComplexEq</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">complex</span> <span class="c1" style="color: #998; font-style: italic;">-- replace everything we already know</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="102" 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">

102

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113

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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="103" 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="114" 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">

114

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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell"><span class="n" style="color: #333;">exprToAlt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</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;">PmAltCon</span></span>

</pre>

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115

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<pre style="margin: 0;">+<span id="LC115" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Note how this deliberately chooses bogus argument types for PmAltConLike.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is only safe for doing lookup in a 'PmRefutEnv'!</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="117" 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">

117

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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"><span class="n" style="color: #333;">exprToAlt</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">cl</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmAltConLike</span> <span class="n" style="color: #333;">cl</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 new new_line" data-linenumber="118" 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">

118

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<pre style="margin: 0;">+<span id="LC118" class="line" lang="haskell"><span class="n" style="color: #333;">exprToAlt</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</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;">PmAltLit</span> <span class="n" style="color: #333;">l</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="119" 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">

119

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<pre style="margin: 0;">+<span id="LC119" class="line" lang="haskell"><span class="n" style="color: #333;">exprToAlt</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>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="120" 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="LC120" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="121" 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="LC121" class="line" lang="haskell"><span class="cd">-- | Record that a particular 'Id' can't take the shape of a 'PmAltCon' in the</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC122" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'TmState' and refute if that leads to a contradiction.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="123" 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="LC123" class="line" lang="haskell"><span class="n" style="color: #333;">addSolveRefutableAltCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmAltCon</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;">TmState</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="124" 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">

124

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<pre style="margin: 0;">+<span id="LC124" class="line" lang="haskell"><span class="n" style="color: #333;">addSolveRefutableAltCon</span> <span class="n" style="color: #333;">original</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">refuts</span><span class="p">))</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">nalt</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="125" 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="LC125" 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;">exprToAlt</span> <span class="n" style="color: #333;">e</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="126" 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">

126

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<pre style="margin: 0;">+<span id="LC126" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Nothing</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;">extended</span>         <span class="c1" style="color: #998; font-style: italic;">-- Not solved yet</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="127" 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">

127

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<pre style="margin: 0;">+<span id="LC127" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">alt</span>                         <span class="c1" style="color: #998; font-style: italic;">-- We have a solution</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="128" 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">

128

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<pre style="margin: 0;">+<span id="LC128" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">alt</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">nalt</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>       <span class="c1" style="color: #998; font-style: italic;">-- ... which is contradictory</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="129" 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">

129

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<pre style="margin: 0;">+<span id="LC129" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</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;">original</span> <span class="c1" style="color: #998; font-style: italic;">-- ... which is compatible, rendering the</span></span>

</pre>

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130

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<pre style="margin: 0;">+<span id="LC130" class="line" lang="haskell">                                       <span class="c1" style="color: #998; font-style: italic;">--     refutation redundant</span></span>

</pre>

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131

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<pre style="margin: 0;">+<span id="LC131" 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 new_line" data-linenumber="132" 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">

132

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<pre style="margin: 0;">+<span id="LC132" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">x</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="133" 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">

133

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<pre style="margin: 0;">+<span id="LC133" class="line" lang="haskell">    <span class="n" style="color: #333;">extended</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">refuts'</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="134" 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">

134

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<pre style="margin: 0;">+<span id="LC134" class="line" lang="haskell">    <span class="n" style="color: #333;">refuts'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">assocAlter</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="n" style="color: #333;">insertNoDup</span> <span class="n" style="color: #333;">nalt</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fromMaybe</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">)</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">refuts</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="135" 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">

135

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<pre style="margin: 0;">+<span id="LC135" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="136" 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="LC136" class="line" lang="haskell"><span class="cd">-- | Return all 'PmAltCon' shapes that are impossible for 'Id' to take, i.e.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="137" 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="LC137" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- would immediately lead to a refutation by the term oracle.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="138" 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="LC138" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefutableAltCons</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">PmAltCon</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="139" 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="LC139" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefutableAltCons</span> <span class="n" style="color: #333;">x</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">refuts</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="140" 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="LC140" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fromMaybe</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="p">(</span><span class="n" style="color: #333;">lookup</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">refuts</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="141" 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">

141

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell"><span class="cd">-- | Solve a complex equality.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="104" 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">

104

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<td class="diff-line-num new_line" data-linenumber="143" 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">

143

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Nothing => definitely unsatisfiable</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="105" 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">

105

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<td class="diff-line-num new_line" data-linenumber="144" 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">

144

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<pre style="margin: 0;"> <span id="LC144" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Just tms => I have added the complex equality and added</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="106" 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">

106

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<td class="diff-line-num new_line" data-linenumber="145" 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">

145

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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--             it to the tmstate; the result may or may not be</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="107" 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">

107

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<td class="diff-line-num new_line" data-linenumber="146" 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">

146

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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--             satisfiable</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="108" 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">

108

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<td class="diff-line-num new_line" data-linenumber="147" 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="LC147" class="line" lang="haskell"><span class="n" style="color: #333;">solveComplexEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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;">TmState</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="109" 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">

109

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<td class="diff-line-num new_line old" data-linenumber="148" 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="LC109" class="line" lang="haskell"><span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">unhandled</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">env</span></span><span class="p">))</span> <span class="n" style="color: #333;">eq</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">eq</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="148" 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="LC148" class="line" lang="haskell"><span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;"><span class="idiff left">_unhandled</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span> <span class="n" style="color: #333;">eq</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">eq</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="110" 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">

110

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<td class="diff-line-num new_line" data-linenumber="149" 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">

149

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We cannot do a thing about these cases</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="111" 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">

111

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<td class="diff-line-num new_line old" data-linenumber="150" 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="LC111" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span>            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="112" 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">

112

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<td class="diff-line-num new_line old" data-linenumber="150" 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="LC112" class="line" lang="haskell">  <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span>            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="113" 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="150" 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="LC150" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kr" style="font-weight: 600;">_</span><span class="p">)</span>            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="113" 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="151" 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="LC151" class="line" lang="haskell">  <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span>            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="113" 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">

113

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<td class="diff-line-num new_line" data-linenumber="152" 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="LC152" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="114" 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">

114

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<td class="diff-line-num new_line" data-linenumber="153" 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="LC153" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">eqPmLit</span> <span class="n" style="color: #333;">l1</span> <span class="n" style="color: #333;">l2</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="115" 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="LC154" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Undecidable Equality for Overloaded Literals]</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="119" 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="158" 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">@@ -119,12 +158,6 @@ solveComplexEq solver_state@(standby, (unhandled, env)) eq@(e1, e2) = case eq of</td>

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c1</span> <span class="n" style="color: #333;">ts1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c2</span> <span class="n" style="color: #333;">ts2</span><span class="p">)</span></span>

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<td class="diff-line-num new_line" data-linenumber="159" 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="LC159" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">c1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c2</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</span> <span class="p">(</span><span class="n" style="color: #333;">zip</span> <span class="n" style="color: #333;">ts1</span> <span class="n" style="color: #333;">ts2</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC160" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</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="LC122" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC123" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTruePmExpr</span> <span class="n" style="color: #333;">e1</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</span> <span class="p">(</span><span class="n" style="color: #333;">t1</span><span class="p">,</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC124" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFalsePmExpr</span> <span class="n" style="color: #333;">e1</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;">eq</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

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<pre style="margin: 0;">-<span id="LC125" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="kr" style="font-weight: 600;">_</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="LC126" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isTruePmExpr</span> <span class="n" style="color: #333;">e2</span>   <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</span> <span class="p">(</span><span class="n" style="color: #333;">t1</span><span class="p">,</span> <span class="n" style="color: #333;">t2</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC127" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isFalsePmExpr</span> <span class="n" style="color: #333;">e2</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;">eq</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC161" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC163" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">y</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;">solver_state</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="133" 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="166" 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">@@ -133,110 +166,56 @@ solveComplexEq solver_state@(standby, (unhandled, env)) eq@(e1, e2) = case eq of</td>

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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">extendSubstAndSolve</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e2</span> <span class="n" style="color: #333;">solver_state</span></span>

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<td class="diff-line-num new_line" data-linenumber="167" 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">

167

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell">  <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">extendSubstAndSolve</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">solver_state</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="135" 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">

135

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<td class="diff-line-num new_line" data-linenumber="168" 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">

168

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<pre style="margin: 0;"> <span id="LC168" class="line" lang="haskell"></span>

</pre>

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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="136" 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">

136

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<td class="diff-line-num new_line old" data-linenumber="169" 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="LC136" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">eq</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="137" 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">

137

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<td class="diff-line-num new_line old" data-linenumber="169" 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="LC137" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="138" 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">

138

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<td class="diff-line-num new_line" data-linenumber="169" 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">

169

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<pre style="margin: 0;"> <span id="LC169" class="line" lang="haskell">  <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;">WARN</span><span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"solveComplexEq: Catch all"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">eq</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="139" 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">

139

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<td class="diff-line-num new_line old" data-linenumber="170" 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="LC139" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span> <span class="c1" style="color: #998; font-style: italic;">-- I HATE CATCH-ALLS</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="140" 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="170" 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">

170

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span> <span class="c1" style="color: #998; font-style: italic;">-- I HATE CATCH-ALLS</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="140" 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">

140

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<td class="diff-line-num new_line" data-linenumber="171" 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">

171

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<pre style="margin: 0;"> <span id="LC171" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="141" 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">

141

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<td class="diff-line-num new_line" data-linenumber="172" 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">

172

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<pre style="margin: 0;"> <span id="LC172" class="line" lang="haskell"><span class="cd">-- | Extend the substitution and solve the (possibly updated) constraints.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="142" 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">

142

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<td class="diff-line-num new_line" data-linenumber="173" 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">

173

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<pre style="margin: 0;"> <span id="LC173" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubstAndSolve</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</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;">TmState</span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="143" 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">

143

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<td class="diff-line-num new_line old" data-linenumber="174" 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="LC143" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubstAndSolve</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="144" 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">

144

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<td class="diff-line-num new_line old" data-linenumber="174" 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="LC144" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">new_incr_state</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">simplifyComplexEq</span> <span class="n" style="color: #333;">changed</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="145" 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="174" 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">

174

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubstAndSolve</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">,</span> <span class="n" style="color: #333;">refuts</span><span class="p">))</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="145" 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="175" 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">

175

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<pre style="margin: 0;">+<span id="LC175" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isRefutable</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span> <span class="n" style="color: #333;">refuts</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="145" 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="176" 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">

176

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<pre style="margin: 0;">+<span id="LC176" 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>

</td>

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<td class="diff-line-num new old_line" data-linenumber="145" 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="177" 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">

177

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

</td>

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

<td class="diff-line-num new old_line" data-linenumber="145" 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="178" 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">

178

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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldlM</span> <span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">new_incr_state</span> <span class="n" style="color: #333;">changed</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="145" 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">

145

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<td class="diff-line-num new_line" data-linenumber="179" 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">

179

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<pre style="margin: 0;"> <span id="LC179" 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="146" 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">

146

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<td class="diff-line-num new_line" data-linenumber="180" 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">

180

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Apply the substitution to the worklist and partition them to the ones</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="147" 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">

147

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<td class="diff-line-num new_line" data-linenumber="181" 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">

181

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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- that had some progress and the rest. Then, recurse over the ones that</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="148" 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">

148

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<td class="diff-line-num new_line" data-linenumber="182" 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">

182

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- had some progress. Careful about performance:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="149" 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">

149

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<td class="diff-line-num new_line" data-linenumber="183" 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">

183

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<pre style="margin: 0;"> <span id="LC183" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Representation of Term Equalities] in deSugar/Check.hs</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="150" 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">

150

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<td class="diff-line-num new_line" data-linenumber="184" 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">

184

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<pre style="margin: 0;"> <span id="LC184" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">changed</span><span class="p">,</span> <span class="n" style="color: #333;">unchanged</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">partitionWith</span> <span class="p">(</span><span class="n" style="color: #333;">substComplexEq</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="n" style="color: #333;">standby</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="151" 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">

151

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<td class="diff-line-num new_line old" data-linenumber="185" 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="LC151" class="line" lang="haskell">    <span class="n" style="color: #333;">new_incr_state</span>       <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">unchanged</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="152" 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="185" 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="LC185" class="line" lang="haskell">    <span class="n" style="color: #333;">new_incr_state</span>       <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">unchanged</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="152" 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">

152

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<td class="diff-line-num new_line" data-linenumber="186" 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">

186

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<pre style="margin: 0;"> <span id="LC186" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="153" 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">

153

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<td class="diff-line-num new_line" data-linenumber="187" 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">

187

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<pre style="margin: 0;"> <span id="LC187" class="line" lang="haskell"><span class="cd">-- | When we know that a variable is fresh, we do not actually have to</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="154" 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">

154

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<td class="diff-line-num new_line" data-linenumber="188" 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">

188

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<pre style="margin: 0;"> <span id="LC188" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- check whether anything changes, we know that nothing does. Hence,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="155" 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">

155

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<td class="diff-line-num new_line" data-linenumber="189" 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">

189

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<pre style="margin: 0;"> <span id="LC189" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- `extendSubst` simply extends the substitution, unlike what</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="156" 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">

156

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<td class="diff-line-num new_line" data-linenumber="190" 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">

190

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<pre style="margin: 0;"> <span id="LC190" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- `extendSubstAndSolve` does.</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="157" 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">

157

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<td class="diff-line-num new_line" data-linenumber="191" 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">

191

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<pre style="margin: 0;"> <span id="LC191" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubst</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">TmState</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="158" 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="192" 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="LC158" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubst</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="159" 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="192" 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="LC192" class="line" lang="haskell"><span class="n" style="color: #333;">extendSubst</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">e</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC193" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNotPmExprOther</span> <span class="n" style="color: #333;">simpl_e</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="160" 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="194" 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="LC160" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">simpl_e</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="161" 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">

161

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<td class="diff-line-num new_line old" data-linenumber="194" 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="LC161" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="162" 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="194" 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="LC194" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="n" style="color: #333;">unhandled</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">simpl_e</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="162" 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="195" 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="LC195" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">standby</span><span class="p">,</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">,</span> <span class="n" style="color: #333;">env</span><span class="p"><span class="idiff left">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refuts</span></span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="162" 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="196" 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="LC196" 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="163" 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="197" 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="LC197" class="line" lang="haskell">    <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="164" 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="198" 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="LC164" class="line" lang="haskell">    <span class="n" style="color: #333;">simpl_e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="165" 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="198" 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="LC165" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="166" 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="198" 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="LC166" class="line" lang="haskell"><span class="cd">-- | Simplify a complex equality.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="167" 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="198" 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="LC167" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyComplexEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="168" 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="198" 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="LC168" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyComplexEq</span> <span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">fst</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="169" 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="198" 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="LC169" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="170" 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="198" 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="LC170" class="line" lang="haskell"><span class="cd">-- | Simplify an expression. The boolean indicates if there has been any</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="171" 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="198" 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="LC171" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- simplification or if the operation was a no-op.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="172" 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">

172

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC172" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyPmExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="173" 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="198" 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="LC173" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Deep equalities]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="174" 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="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">e</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="175" 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="LC175" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">ts</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mapAndUnzip</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">ts</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="176" 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="198" 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="LC176" class="line" lang="haskell">                      <span class="p">(</span><span class="n" style="color: #333;">ts'</span><span class="p">,</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">ts'</span><span class="p">,</span> <span class="n" style="color: #333;">or</span> <span class="n" style="color: #333;">bs</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="177" 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="LC177" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">t1</span> <span class="n" style="color: #333;">t2</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">simplifyEqExpr</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 old_line" data-linenumber="178" 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="LC178" class="line" lang="haskell">  <span class="n" style="color: #333;">_other_expr</span>    <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">e</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- the others are terminals</span></span>

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<td class="diff-line-num old old_line" data-linenumber="179" 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="LC179" class="line" lang="haskell"></span>

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<td class="diff-line-num old old_line" data-linenumber="180" 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="LC180" class="line" lang="haskell"><span class="cd">-- | Simplify an equality expression. The equality is given in parts.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="181" 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="LC181" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyEqExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="182" 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="LC182" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Deep equalities]</span></span>

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<td class="diff-line-num old old_line" data-linenumber="183" 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="LC183" class="line" lang="haskell"><span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<td class="diff-line-num old old_line" data-linenumber="184" 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="LC184" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Varables</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="185" 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="LC185" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="186" 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="LC186" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">y</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">truePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="187" 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="198" 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="LC187" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="188" 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="LC188" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Literals</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="189" 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="198" 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="LC189" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprLit</span> <span class="n" style="color: #333;">l2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">eqPmLit</span> <span class="n" style="color: #333;">l1</span> <span class="n" style="color: #333;">l2</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<td class="diff-line-num old old_line" data-linenumber="190" 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="LC190" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- See Note [Undecidable Equality for Overloaded Literals]</span></span>

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191

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC191" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">True</span>  <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">truePmExpr</span><span class="p">,</span>  <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="192" 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">

192

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC192" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">falsePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="193" 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">

193

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC193" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="194" 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">

194

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC194" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Can potentially be simplified</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="195" 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">

195

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC195" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="p">{},</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e2</span><span class="p">)</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="196" 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">

196

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC196" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="197" 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">

197

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC197" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="198" 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">

198

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC198" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- cannot progress</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="199" 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">

199

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC199" class="line" lang="haskell">  <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="p">{})</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">e2</span><span class="p">)</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="200" 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">

200

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC200" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="201" 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">

201

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC201" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="202" 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">

202

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC202" class="line" lang="haskell">    <span class="p">((</span><span class="n" style="color: #333;">e1'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">),</span> <span class="p">(</span><span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">))</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1'</span> <span class="n" style="color: #333;">e2'</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- cannot progress</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="203" 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">

203

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC203" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="204" 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="198" 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="LC204" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Constructors</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="205" 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">

205

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC205" class="line" lang="haskell">  <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c1</span> <span class="n" style="color: #333;">ts1</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c2</span> <span class="n" style="color: #333;">ts2</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="206" 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="198" 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="LC206" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">c1</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c2</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="207" 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="198" 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="LC207" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">ts1'</span><span class="p">,</span> <span class="n" style="color: #333;">bs1</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapAndUnzip</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">ts1</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="208" 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="198" 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="LC208" class="line" lang="haskell">            <span class="p">(</span><span class="n" style="color: #333;">ts2'</span><span class="p">,</span> <span class="n" style="color: #333;">bs2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapAndUnzip</span> <span class="n" style="color: #333;">simplifyPmExpr</span> <span class="n" style="color: #333;">ts2</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="209" 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">

209

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC209" class="line" lang="haskell">            <span class="p">(</span><span class="n" style="color: #333;">tss</span><span class="p">,</span> <span class="n" style="color: #333;">_bss</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWithAndUnzip</span> <span class="n" style="color: #333;">simplifyEqExpr</span> <span class="n" style="color: #333;">ts1'</span> <span class="n" style="color: #333;">ts2'</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="210" 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="198" 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="LC210" class="line" lang="haskell">            <span class="n" style="color: #333;">worst_case</span>  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c1</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;">PmExprCon</span> <span class="n" style="color: #333;">c2</span> <span class="n" style="color: #333;">ts2'</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="211" 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="198" 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="LC211" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">in</span>  <span class="kr" style="font-weight: 600;">if</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">not</span> <span class="p">(</span><span class="n" style="color: #333;">or</span> <span class="n" style="color: #333;">bs1</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">or</span> <span class="n" style="color: #333;">bs2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">worst_case</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- no progress</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="212" 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="198" 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="LC212" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">all</span> <span class="n" style="color: #333;">isTruePmExpr</span>  <span class="n" style="color: #333;">tss</span>  <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">truePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="213" 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="198" 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="LC213" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">any</span> <span class="n" style="color: #333;">isFalsePmExpr</span> <span class="n" style="color: #333;">tss</span>  <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">falsePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="214" 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="198" 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="LC214" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>              <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">worst_case</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="215" 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="198" 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="LC215" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">falsePmExpr</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">True</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="216" 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="198" 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="LC216" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="217" 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="198" 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="LC217" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We cannot do anything about the rest..</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="218" 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="198" 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="LC218" class="line" lang="haskell">  <span class="n" style="color: #333;">_other_equality</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">original</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">False</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="219" 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">

219

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC219" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="220" 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">

220

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<td class="diff-line-num new_line old" data-linenumber="198" 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="LC220" 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 old_line" data-linenumber="221" 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="LC221" class="line" lang="haskell">    <span class="n" style="color: #333;">original</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span> <span class="c1" style="color: #998; font-style: italic;">-- reconstruct equality</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC198" class="line" lang="haskell">    <span class="n" style="color: #333;">simpl_e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC199" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC200" class="line" lang="haskell"><span class="cd">-- | Apply an (un-flattened) substitution to a simple equality.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="haskell"><span class="n" style="color: #333;">applySubstComplexEq</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC202" class="line" lang="haskell"><span class="n" style="color: #333;">applySubstComplexEq</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="n" style="color: #333;">e1</span><span class="p">,</span><span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e1</span><span class="p">,</span> <span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC203" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC227" class="line" lang="haskell"><span class="cd">-- | Apply an (un-flattened) substitution to a variable.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC228" class="line" lang="haskell"><span class="n" style="color: #333;">varDeepLookup</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC229" class="line" lang="haskell"><span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC230" 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;">e</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">lookupNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span> <span class="c1" style="color: #998; font-style: italic;">-- go deeper</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="231" 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="LC231" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>                  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span>          <span class="c1" style="color: #998; font-style: italic;">-- terminal</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC204" class="line" lang="haskell"><span class="cd">-- | Apply an (un-flattened) substitution to a variable and return its</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC205" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- representative in the triangular substitution @env@ and the completely</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC206" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- substituted expression. The latter may just be the representative wrapped</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC207" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with 'PmExprVar' if we haven't found a solution for it yet.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC208" class="line" lang="haskell"><span class="n" style="color: #333;">varDeepLookup</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Name</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC209" class="line" lang="haskell"><span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="210" 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="LC210" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">y</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">varDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="211" 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="LC211" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">e</span>             <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- go deeper</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">Nothing</span>            <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span>          <span class="c1" style="color: #998; font-style: italic;">-- terminal</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE varDeepLookup #-}</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC214" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"><span class="cd">-- | Apply an (un-flattened) substitution to an expression.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC236" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">varDeepLookup</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">x</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span>    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">snd</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">varDeepLookup</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">env</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="n" style="color: #333;">es</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="n" style="color: #333;">c</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span><span class="p">)</span> <span class="n" style="color: #333;">es</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC238" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="n" style="color: #333;">e1</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">PmExprEq</span> <span class="p">(</span><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e1</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC239" class="line" lang="haskell">                                               <span class="p">(</span><span class="n" style="color: #333;">exprDeepLookup</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">e2</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="219" 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="LC219" class="line" lang="haskell"><span class="n" style="color: #333;">exprDeepLookup</span> <span class="kr" style="font-weight: 600;">_</span>   <span class="n" style="color: #333;">other_expr</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">other_expr</span> <span class="c1" style="color: #998; font-style: italic;">-- PmExprLit, PmExprOther</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="220" 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="LC220" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC221" class="line" lang="haskell"><span class="cd">-- | External interface to the term oracle.</span></span>

</pre>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -248,18 +227,53 @@ pmLitType :: PmLit -> Type -- should be in PmExpr but gives cyclic imports :(</td>

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<pre style="margin: 0;"> <span id="LC227" class="line" lang="haskell"><span class="n" style="color: #333;">pmLitType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmSLit</span>   <span class="n" style="color: #333;">lit</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hsLitType</span>   <span class="n" style="color: #333;">lit</span></span>

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<pre style="margin: 0;"> <span id="LC228" class="line" lang="haskell"><span class="n" style="color: #333;">pmLitType</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmOLit</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">overLitType</span> <span class="n" style="color: #333;">lit</span></span>

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<pre style="margin: 0;"> <span id="LC229" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC251" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Deep equalities]</span></span>

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<pre style="margin: 0;">-<span id="LC252" 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="LC253" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Solving nested equalities is the most difficult part. The general strategy</span></span>

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<pre style="margin: 0;">-<span id="LC254" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">is the following:</span></span>

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<pre style="margin: 0;">-<span id="LC255" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC256" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Equalities of the form (True ~ (e1 ~ e2)) are transformed to just</span></span>

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<pre style="margin: 0;">-<span id="LC257" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    (e1 ~ e2) and then treated recursively.</span></span>

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<pre style="margin: 0;">-<span id="LC258" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC259" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">  * Equalities of the form (False ~ (e1 ~ e2)) cannot be analyzed unless</span></span>

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<pre style="margin: 0;">-<span id="LC260" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    we know more about the inner equality (e1 ~ e2). That's exactly what</span></span>

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<pre style="margin: 0;">-<span id="LC261" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    `simplifyEqExpr' tries to do: It takes e1 and e2 and either returns</span></span>

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<pre style="margin: 0;">-<span id="LC262" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    truePmExpr, falsePmExpr or (e1' ~ e2') in case it is uncertain. Note</span></span>

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<pre style="margin: 0;">-<span id="LC263" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    that it is not e but rather e', since it may perform some</span></span>

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<pre style="margin: 0;">-<span id="LC264" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    simplifications deeper.</span></span>

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<pre style="margin: 0;">-<span id="LC265" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span></pre>

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<pre style="margin: 0;">+<span id="LC230" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Refutable shapes]</span></span>

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<pre style="margin: 0;">+<span id="LC231" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC232" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Consider a pattern match like</span></span>

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<pre style="margin: 0;">+<span id="LC234" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC235" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    foo x</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC236" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | 0 <- x = 42</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC237" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | 0 <- x = 43</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC238" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | 1 <- x = 44</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC239" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | otherwise = 45</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC240" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC241" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When we handle the first pattern guard in Check, it will be desugared to a match</span></span>

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<pre style="margin: 0;">+<span id="LC242" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">of the form</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC243" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC244" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    0 x</span></span>

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<pre style="margin: 0;">+<span id="LC245" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    x y</span></span>

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<pre style="margin: 0;">+<span id="LC246" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC247" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Where the first line is the pattern vector and the second line is a value vector</span></span>

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<pre style="margin: 0;">+<span id="LC248" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">abstraction. In LitVar, this will split the value vector abstraction for `x`</span></span>

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<pre style="margin: 0;">+<span id="LC249" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">into a positive `PmLit 0` and a negative `PmLit x [0]` value abstraction. While</span></span>

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<pre style="margin: 0;">+<span id="LC250" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the former is immediately matched against the pattern vector, the latter (vector</span></span>

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<pre style="margin: 0;">+<span id="LC251" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">value abstraction `~[0] y`) is completely uncovered by the clause.</span></span>

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<pre style="margin: 0;">+<span id="LC252" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC253" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`pmcheck` proceeds by *discarding* the head of the value vector abstraction to</span></span>

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<pre style="margin: 0;">+<span id="LC254" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">accomodate for the desugaring of the guard. But this also discards the valuable</span></span>

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<pre style="margin: 0;">+<span id="LC255" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">information that `x` certainly is not the literal 0! Consequently, we wouldn't</span></span>

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<pre style="margin: 0;">+<span id="LC256" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">be able to report the second clause as redundant.</span></span>

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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC258" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">That's a typical example of why we need the term oracle, and in this specific</span></span>

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<pre style="margin: 0;">+<span id="LC259" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">case, the ability to encode that `x` certainly is not the literal 0. Equipped</span></span>

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<pre style="margin: 0;">+<span id="LC260" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">with that knowledge, the term oracle can immediately refute the constraint</span></span>

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<pre style="margin: 0;">+<span id="LC261" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`x ~ 0` generated by the second clause and report the clause as redundant.</span></span>

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<pre style="margin: 0;">+<span id="LC262" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">After the third clause, the set of such *refutable* literals is again extended</span></span>

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<pre style="margin: 0;">+<span id="LC263" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">to `[0, 1]`.</span></span>

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<pre style="margin: 0;">+<span id="LC264" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC265" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In general, we want to store a set of refutable shapes (`PmAltCon`) for each</span></span>

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<pre style="margin: 0;">+<span id="LC266" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">variable. That's the purpose of the `PmRefutEnv` in PmExpr. This extends to</span></span>

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<pre style="margin: 0;">+<span id="LC267" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`ConLike`s, where all value arguments are universally quantified implicitly.</span></span>

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<pre style="margin: 0;">+<span id="LC268" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">So, if the `PmRefutEnv` contains an entry for `x` with `Just [Bool]`, then this</span></span>

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<pre style="margin: 0;">+<span id="LC269" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">corresponds to the fact that `forall y. x ≁ Just @Bool y`.</span></span>

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<pre style="margin: 0;">+<span id="LC270" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC271" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`addSolveRefutableAltCon` will add such a refutable mapping to the `PmRefutEnv`</span></span>

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<pre style="margin: 0;">+<span id="LC272" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in the term oracles state and check if causes any immediate contradiction.</span></span>

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<pre style="margin: 0;">+<span id="LC273" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Whenever we record a solution in the substitution via `extendSubstAndSolve`, the</span></span>

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<pre style="margin: 0;">+<span id="LC274" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">refutable environment is checked for any matching refutable `PmAltCon`.</span></span>

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<pre style="margin: 0;">+<span id="LC275" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC276" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note that `PmAltConLike` carries a list of type arguments. This purely for the</span></span>

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<pre style="margin: 0;">+<span id="LC277" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">purpose of being able to reconstruct all other constructors of the matching</span></span>

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<pre style="margin: 0;">+<span id="LC278" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">group the `ConLike` is part of through calling `allCompleteMatches` in Check.</span></span>

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<pre style="margin: 0;">+<span id="LC279" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span></pre>

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<td class="line_content match" style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">\ No newline at end of file</td>

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<br>

</li>

<li id="2cbc08c5f3b1dcbc9c763a836b51491224c05e50">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/0e1b15dbd63928d9edbf336189f037abaa3876cf#2cbc08c5f3b1dcbc9c763a836b51491224c05e50"><strong>compiler/utils/ListSetOps.hs</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -12,9 +12,10 @@ module ListSetOps (</td>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Association lists</span></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">Assoc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">assoc</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">assocMaybe</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">assocUsing</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">assocDefault</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">assocDefaultUsing</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">assocAlter</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Duplicate handling</span></span>

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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">hasNoDups</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">removeDups</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">findDupsEq</span><span class="p">,</span></span>

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">hasNoDups</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">removeDups</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">findDupsEq</span><span class="p">,</span><span class="idiff left"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">insertNoDup</span></span><span class="p"><span class="idiff right">,</span></span></span>

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">equivClasses</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Indexing</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="27" 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="28" 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">@@ -27,6 +28,7 @@ import GhcPrelude</td>

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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Outputable</span></span>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Util</span></span>

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">listToMaybe</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span></span>

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.List.NonEmpty</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">NE</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="103" 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="105" 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">@@ -103,6 +105,7 @@ assocDefault      :: (Eq a) => b -> Assoc a b -> a -> b</td>

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<pre style="margin: 0;"> <span id="LC105" class="line" lang="haskell"><span class="n" style="color: #333;">assocUsing</span>        <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Assoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;"> <span id="LC106" class="line" lang="haskell"><span class="n" style="color: #333;">assocMaybe</span>        <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Assoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;"> <span id="LC107" class="line" lang="haskell"><span class="n" style="color: #333;">assocDefaultUsing</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Assoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="n" style="color: #333;">assocAlter</span>        <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="n" style="color: #333;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Assoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Assoc</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="haskell"><span class="n" style="color: #333;">assocDefaultUsing</span> <span class="kr" style="font-weight: 600;">_</span>  <span class="n" style="color: #333;">deflt</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span>             <span class="kr" style="font-weight: 600;">_</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">deflt</span></span>

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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"><span class="n" style="color: #333;">assocDefaultUsing</span> <span class="n" style="color: #333;">eq</span> <span class="n" style="color: #333;">deflt</span> <span class="p">((</span><span class="n" style="color: #333;">k</span><span class="p">,</span><span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">rest</span><span class="p">)</span> <span class="n" style="color: #333;">key</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="119" 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="122" 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">@@ -119,6 +122,14 @@ assocMaybe alist key</td>

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell">    <span class="n" style="color: #333;">lookup</span> <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;">Nothing</span></span>

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<td class="diff-line-num old_line" data-linenumber="120" 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="LC123" class="line" lang="haskell">    <span class="n" style="color: #333;">lookup</span> <span class="p">((</span><span class="n" style="color: #333;">tv</span><span class="p">,</span><span class="n" style="color: #333;">ty</span><span class="p">)</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">rest</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">key</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">tv</span> <span class="kr" style="font-weight: 600;">then</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">ty</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">rest</span></span>

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<pre style="margin: 0;"> <span id="LC124" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC125" class="line" lang="haskell"><span class="n" style="color: #333;">assocAlter</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">assocs</span></span>

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<pre style="margin: 0;">+<span id="LC126" 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;">v</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">mb_entry</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">k</span><span class="p">,</span><span class="n" style="color: #333;">v</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">assocs'</span></span>

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<td class="diff-line-num new new_line" data-linenumber="127" 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="LC127" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>            <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">assocs'</span></span>

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<td class="diff-line-num new new_line" data-linenumber="128" 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="LC128" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<td class="diff-line-num new old_line" data-linenumber="122" 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="129" 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="LC129" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="p">,</span> <span class="n" style="color: #333;">r</span><span class="p">)</span>   <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">break</span> <span class="p">((</span><span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">k</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fst</span><span class="p">)</span> <span class="n" style="color: #333;">assocs</span></span>

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<td class="diff-line-num new new_line" data-linenumber="130" 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="LC130" class="line" lang="haskell">    <span class="n" style="color: #333;">mb_entry</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">snd</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">listToMaybe</span> <span class="n" style="color: #333;">r</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="131" 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="LC131" class="line" lang="haskell">    <span class="n" style="color: #333;">assocs'</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">l</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">drop</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">r</span></span>

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<td class="diff-line-num new new_line" data-linenumber="132" 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="LC132" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC133" 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="LC134" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*                                                                      *</span></span>

</pre>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -169,3 +180,8 @@ findDupsEq _  [] = []</td>

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<td class="diff-line-num old_line" data-linenumber="169" 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">

169

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180

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<pre style="margin: 0;"> <span id="LC180" class="line" lang="haskell"><span class="n" style="color: #333;">findDupsEq</span> <span class="n" style="color: #333;">eq</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">xs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">eq_xs</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">findDupsEq</span> <span class="n" style="color: #333;">eq</span> <span class="n" style="color: #333;">xs</span></span>

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170

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<pre style="margin: 0;"> <span id="LC181" class="line" lang="haskell">                     <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>   <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">eq_xs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">findDupsEq</span> <span class="n" style="color: #333;">eq</span> <span class="n" style="color: #333;">neq_xs</span></span>

</pre>

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171

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182

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<pre style="margin: 0;"> <span id="LC182" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="n" style="color: #333;">eq_xs</span><span class="p">,</span> <span class="n" style="color: #333;">neq_xs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">partition</span> <span class="p">(</span><span class="n" style="color: #333;">eq</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">xs</span></span>

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="184" 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="LC184" class="line" lang="haskell"><span class="n" style="color: #333;">insertNoDup</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Eq</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">a</span><span class="p">]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell"><span class="n" style="color: #333;">insertNoDup</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">set</span></span>

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<pre style="margin: 0;">+<span id="LC186" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">find</span> <span class="p">(</span><span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">set</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">set</span></span>

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<pre style="margin: 0;">+<span id="LC187" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span>             <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">set</span></span></pre>

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