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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/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d">5ccfbb40</a></strong>

<div>

<span>by Sebastian Graf</span>

<i>at 2019-05-31T16:06:15Z</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

kind "x can no longer be the literal 5". We encode this knowledge in a

`PmRefutEnv`, mapping a set of newly introduced `PmAltCon`s (which are

just `PmLit`s at the moment) to each variable denoting above

inequalities.

So, say we have `x ≁ 42 ∈ refuts` in the term oracle context and

try to solve an equality like `x ~ 42`. The entry in the refutable

environment will immediately lead to a contradiction.

This machinery renders the whole `PmExprEq` business unnecessary,

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

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

</pre>

</li>

</ul>

<h4>7 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#49d2d51d42e9c209de33c35681b9c9b1e912cda9">

compiler/basicTypes/NameEnv.hs

</a>

</li>

<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>

</li>

<li class="file-stats">

<a href="#584407121afc66978c814dbdb5c252118d27656a">

<span class="new-file">

+

compiler/deSugar/PmPpr.hs

</span>

</a>

</li>

<li class="file-stats">

<a href="#379674a5063221cec43f0f659c2eb67b30339f45">

compiler/deSugar/TmOracle.hs

</a>

</li>

<li class="file-stats">

<a href="#0f33fd88c617246c7f89c4477d2d1d24f942df23">

compiler/ghc.cabal.in

</a>

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<li class="file-stats">

<a href="#2cbc08c5f3b1dcbc9c763a836b51491224c05e50">

compiler/utils/ListSetOps.hs

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="49d2d51d42e9c209de33c35681b9c9b1e912cda9">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#49d2d51d42e9c209de33c35681b9c9b1e912cda9"><strong>compiler/basicTypes/NameEnv.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="25" style="width: 35px; color: rgba(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="25" style="width: 35px; color: rgba(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">@@ -25,6 +25,7 @@ module NameEnv (</td>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">emptyDNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">lookupDNameEnv</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">delFromDNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">mapDNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">alterDNameEnv</span><span class="p">,</span></span>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- ** Dependency analysis</span></span>

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<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="diff-line-num unfold js-unfold new_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">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -147,6 +148,9 @@ emptyDNameEnv = emptyUDFM</td>

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<pre style="margin: 0;"> <span id="LC148" class="line" lang="haskell"><span class="n" style="color: #333;">lookupDNameEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</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;">Name</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;">a</span></span>

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell"><span class="n" style="color: #333;">lookupDNameEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">lookupUDFM</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="LC151" class="line" lang="haskell"><span class="n" style="color: #333;">delFromDNameEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</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;">Name</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</span> <span class="n" style="color: #333;">a</span></span>

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"><span class="n" style="color: #333;">delFromDNameEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">delFromUDFM</span></span>

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<pre style="margin: 0;">+<span id="LC153" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell"><span class="n" style="color: #333;">mapDNameEnv</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;">b</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</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;">DNameEnv</span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"><span class="n" style="color: #333;">mapDNameEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapUDFM</span></span>

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<pre style="margin: 0;"> <span id="LC156" class="line" lang="haskell"></span>

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<br>

</li>

<li id="bd37d71fa68b0980d832d992b427fd6a6bdb891d">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#bd37d71fa68b0980d832d992b427fd6a6bdb891d"><strong>compiler/deSugar/Check.hs</strong></a>

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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="25" style="width: 35px; color: rgba(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">@@ -25,6 +25,7 @@ module Check (</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;">GhcPrelude</span></span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>

</pre>

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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;">TmOracle</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;">PmPpr</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;">Unify</span><span class="p">(</span> <span class="n" style="color: #333;">tcMatchTy</span> <span class="p">)</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;">DynFlags</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;">HsSyn</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1672" style="width: 35px; color: rgba(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="1673" style="width: 35px; color: rgba(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">@@ -1672,11 +1673,6 @@ mkGuard pv e = do</td>

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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="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="LC1674" 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>

</pre>

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<pre style="margin: 0;"> <span id="LC1675" class="line" lang="haskell"></span>

</pre>

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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>

</pre>

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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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1679" 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">

1679

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<td class="diff-line-num new_line old" data-linenumber="1676" 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="LC1679" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1680" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1680

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1676

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<pre style="margin: 0;"> <span id="LC1676" class="line" lang="haskell"><span class="cd">-- | Create a term equality of the form: `(x ~ lit)`</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1681" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1681

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<td class="diff-line-num new_line" data-linenumber="1677" style="width: 35px; color: rgba(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="LC1677" 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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1682" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1682

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1678

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<pre style="margin: 0;"> <span id="LC1678" class="line" lang="haskell"><span class="n" style="color: #333;">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="diff-line-num unfold js-unfold old_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">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="2112" style="width: 35px; color: rgba(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">@@ -2116,7 +2112,8 @@ pmcheckHd (p@(PmLit l)) ps guards (PmVar x) (ValVec vva delta)</td>

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<td class="diff-line-num old_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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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;">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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<td class="diff-line-num old_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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<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="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>

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<td class="diff-line-num old_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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<td class="diff-line-num new_line" data-linenumber="2114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2114

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<pre style="margin: 0;"> <span id="LC2114" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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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="2115" 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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2115

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<pre style="margin: 0;">+<span id="LC2115" 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 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="2116" 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">

2116

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<pre style="margin: 0;">+<span id="LC2116" 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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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="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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<td class="diff-line-num old_line" data-linenumber="2121" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2121

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2118

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<pre style="margin: 0;"> <span id="LC2118" 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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<td class="diff-line-num old_line" data-linenumber="2122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2122

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<td class="diff-line-num new_line" data-linenumber="2119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2119

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<pre style="margin: 0;"> <span id="LC2119" class="line" lang="haskell"></span>

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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="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">...</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 +2133,8 @@ pmcheckHd (p@(PmLit l)) ps guards</td>

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<pre style="margin: 0;"> <span id="LC2133" 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>

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2137

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2134

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<pre style="margin: 0;"> <span id="LC2134" 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="2135" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2135

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<pre style="margin: 0;"> <span id="LC2135" 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="2136" 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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2136

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<pre style="margin: 0;">+<span id="LC2136" 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="2137" 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">

2137

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<pre style="margin: 0;">+<span id="LC2137" 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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<td class="diff-line-num new_line" data-linenumber="2138" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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="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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<td class="diff-line-num old_line" data-linenumber="2141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2141

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2139

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<pre style="margin: 0;"> <span id="LC2139" 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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<td class="diff-line-num old_line" data-linenumber="2142" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2142

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<td class="diff-line-num new_line" data-linenumber="2140" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2140

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<pre style="margin: 0;"> <span id="LC2140" 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="2476" style="width: 35px; color: rgba(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">@@ -2478,21 +2476,15 @@ isAnyPmCheckEnabled dflags (DsMatchContext kind _loc)</td>

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2478

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2476

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<pre style="margin: 0;"> <span id="LC2476" class="line" lang="haskell"></span>

</pre>

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2479

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<td class="diff-line-num new_line" data-linenumber="2477" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2477

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<pre style="margin: 0;"> <span id="LC2477" 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>

</pre>

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2480

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<td class="diff-line-num new_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">

2478

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<pre style="margin: 0;"> <span id="LC2478" 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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2481

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<td class="diff-line-num new_line old" data-linenumber="2479" 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="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;"><span class="idiff left">residual_eqs</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">subst</span></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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2482

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<td class="diff-line-num new_line old" data-linenumber="2479" 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="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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2483" 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">

2483

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<td class="diff-line-num new_line old" data-linenumber="2479" 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="LC2483" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">in</span>  <span class="n" style="color: #333;">ppr<span class="idiff left">_uncovered</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vector</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">residual_eq</span>s</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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2479

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<pre style="margin: 0;">+<span id="LC2479" 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;"><span class="idiff left">subst</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="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 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="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 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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<td class="diff-line-num new new_line" data-linenumber="2481" 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="LC2481" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">in</span>  <span class="n" style="color: #333;">ppr<span class="idiff left">Uncovered</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">vector</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">refut</span>s</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2484" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2484

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<td class="diff-line-num new_line" data-linenumber="2482" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2482

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<pre style="margin: 0;"> <span id="LC2482" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2485" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2485

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<td class="diff-line-num new_line" data-linenumber="2483" style="width: 35px; color: rgba(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="LC2483" 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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<td class="diff-line-num old_line" data-linenumber="2486" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2486

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<td class="diff-line-num new_line" data-linenumber="2484" style="width: 35px; color: rgba(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="LC2484" 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 old_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">

2487

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<td class="diff-line-num new_line" data-linenumber="2485" style="width: 35px; color: rgba(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="LC2485" class="line" lang="haskell"><span class="n" style="color: #333;">substInValAbs</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">ValAbs</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;">PmExpr</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2488" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2488

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<td class="diff-line-num new_line" data-linenumber="2486" style="width: 35px; color: rgba(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="LC2486" class="line" lang="haskell"><span class="n" style="color: #333;">substInValAbs</span> <span class="n" style="color: #333;">subst</span> <span class="o" style="font-weight: 600;">=</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;">subst</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">vaToPmExpr</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_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">

2489

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<td class="diff-line-num 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">

2487

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<pre style="margin: 0;"> <span id="LC2487" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" 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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<td class="diff-line-num new_line old" data-linenumber="2488" 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="LC2490" class="line" lang="haskell"><span class="cd">-- | Wrap up the term oracle's state once solving is complete. Drop any</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2491" 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">

2491

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<td class="diff-line-num new_line old" data-linenumber="2488" 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="LC2491" 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 old old_line" data-linenumber="2492" 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="2488" 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="LC2492" 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 old old_line" data-linenumber="2493" 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">

2493

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<td class="diff-line-num new_line old" data-linenumber="2488" 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><span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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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<td class="diff-line-num old old_line" data-linenumber="2494" 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="2488" 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;">residual</span><span class="p">,</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</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="p">(</span><span class="n" style="color: #333;">residual</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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<td class="diff-line-num old old_line" data-linenumber="2495" 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">

2495

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<td class="diff-line-num new_line old" data-linenumber="2488" 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="LC2495" 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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<td class="diff-line-num new_line" data-linenumber="2488" style="width: 35px; color: rgba(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="LC2488" class="line" lang="haskell"><span class="cd">-- | Issue all the warnings (coverage, exhaustiveness, inaccessibility)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2497" style="width: 35px; color: rgba(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="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="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 old_line" data-linenumber="2498" style="width: 35px; color: rgba(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="LC2490" class="line" lang="haskell"><span class="n" style="color: #333;">dsPmWarn</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">ctx</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">loc</span><span class="p">)</span> <span class="n" style="color: #333;">pm_result</span></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2532" style="width: 35px; color: rgba(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="2524" style="width: 35px; color: rgba(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">@@ -2532,10 +2524,11 @@ dsPmWarn dflags ctx@(DsMatchContext kind loc) pm_result</td>

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<td class="diff-line-num old_line" data-linenumber="2532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2532

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2524

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<pre style="margin: 0;"> <span id="LC2524" class="line" lang="haskell">    <span class="n" style="color: #333;">maxPatterns</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maxUncoveredPatterns</span> <span class="n" style="color: #333;">dflags</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2533

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<td class="diff-line-num new_line" data-linenumber="2525" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2525

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<pre style="margin: 0;"> <span id="LC2525" class="line" lang="haskell"></span>

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<td class="diff-line-num old_line" data-linenumber="2534" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2534

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<td class="diff-line-num new_line" data-linenumber="2526" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2526

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<pre style="margin: 0;"> <span id="LC2526" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Print a single clause (for redundant/with-inaccessible-rhs)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2535" 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">

2535

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<td class="diff-line-num new_line old" data-linenumber="2527" 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="LC2535" class="line" lang="haskell">    <span class="n" style="color: #333;">pprEqn</span> <span class="n" style="color: #333;">q</span> <span class="n" style="color: #333;">txt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp_context</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="n" style="color: #333;">txt</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr_eqn</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">q</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2536" 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="2527" 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">

2527

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<pre style="margin: 0;">+<span id="LC2527" class="line" lang="haskell">    <span class="n" style="color: #333;">pprEqn</span> <span class="n" style="color: #333;">q</span> <span class="n" style="color: #333;">txt</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprContext</span> <span class="kt" style="color: #458; font-weight: 600;">True</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="n" style="color: #333;">txt</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2536" 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="2528" 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">

2528

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<pre style="margin: 0;">+<span id="LC2528" class="line" lang="haskell">      <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">pprPats</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;">q</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2536" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2536

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<td class="diff-line-num new_line" data-linenumber="2529" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2529

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<pre style="margin: 0;"> <span id="LC2529" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2537" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2537

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<td class="diff-line-num new_line" data-linenumber="2530" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2530

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<pre style="margin: 0;"> <span id="LC2530" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Print several clauses (for uncovered clauses)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2538" 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">

2538

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<td class="diff-line-num new_line old" data-linenumber="2531" 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="LC2538" class="line" lang="haskell">    <span class="n" style="color: #333;">pprEqns</span> <span class="n" style="color: #333;">qs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp<span class="idiff left right">_c</span>ontext</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"are non-exhaustive"</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2539" 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="2531" 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">

2531

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<pre style="margin: 0;">+<span id="LC2531" class="line" lang="haskell">    <span class="n" style="color: #333;">pprEqns</span> <span class="n" style="color: #333;">qs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp<span class="idiff left right">rC</span>ontext</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"are non-exhaustive"</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2539" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2539

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<td class="diff-line-num new_line" data-linenumber="2532" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2532

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<pre style="margin: 0;"> <span id="LC2532" class="line" lang="haskell">      <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">qs</span> <span class="kr" style="font-weight: 600;">of</span> <span class="c1" style="color: #998; font-style: italic;">-- See #11245</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2540" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2540

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<td class="diff-line-num new_line" data-linenumber="2533" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2533

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<pre style="margin: 0;"> <span id="LC2533" class="line" lang="haskell">           <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">ValVec</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2541

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<td class="diff-line-num new_line" data-linenumber="2534" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2534

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<pre style="margin: 0;"> <span id="LC2534" class="line" lang="haskell">                    <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Guards do not cover entire pattern space"</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2546" style="width: 35px; color: rgba(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="2539" style="width: 35px; color: rgba(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">@@ -2546,7 +2539,7 @@ dsPmWarn dflags ctx@(DsMatchContext kind loc) pm_result</td>

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2546

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2539

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<pre style="margin: 0;"> <span id="LC2539" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2547" style="width: 35px; color: rgba(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="LC2540" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Print a type-annotated wildcard (for non-exhaustive `EmptyCase`s for</span></span>

</pre>

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2548

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<td class="diff-line-num new_line" data-linenumber="2541" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2541

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<pre style="margin: 0;"> <span id="LC2541" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- which we only know the type and have no inhabitants at hand)</span></span>

</pre>

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2549

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<td class="diff-line-num new_line old" data-linenumber="2542" 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="LC2549" class="line" lang="haskell">    <span class="n" style="color: #333;">warnEmptyCase</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp<span class="idiff left right">_c</span>ontext</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"are non-exhaustive"</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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2542

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<pre style="margin: 0;">+<span id="LC2542" class="line" lang="haskell">    <span class="n" style="color: #333;">warnEmptyCase</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pp<span class="idiff left right">rC</span>ontext</span> <span class="kt" style="color: #458; font-weight: 600;">False</span> <span class="n" style="color: #333;">ctx</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"are non-exhaustive"</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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2550

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<td class="diff-line-num new_line" data-linenumber="2543" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2543

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<pre style="margin: 0;"> <span id="LC2543" class="line" lang="haskell">      <span class="n" style="color: #333;">hang</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Patterns not matched:"</span><span class="p">)</span> <span class="mi" style="color: #099;">4</span> <span class="p">(</span><span class="n" style="color: #333;">underscore</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">dcolon</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span></span>

</pre>

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2551

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2544

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<pre style="margin: 0;"> <span id="LC2544" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2552" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2552

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<td class="diff-line-num new_line" data-linenumber="2545" style="width: 35px; color: rgba(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="LC2545" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Inaccessible warnings for record updates]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2618" style="width: 35px; color: rgba(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="2611" style="width: 35px; color: rgba(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">@@ -2618,8 +2611,8 @@ exhaustiveWarningFlag (StmtCtxt {}) = Nothing -- Don't warn about incomplete pat</td>

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2618

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<td class="diff-line-num new_line" data-linenumber="2611" style="width: 35px; color: rgba(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="LC2611" class="line" lang="haskell">                                       <span class="c1" style="color: #998; font-style: italic;">-- incomplete</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2619" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2619

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<td class="diff-line-num new_line" data-linenumber="2612" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2612

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<pre style="margin: 0;"> <span id="LC2612" class="line" lang="haskell"></span>

</pre>

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2620

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<pre style="margin: 0;"> <span id="LC2613" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- True <==> singular</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="2614" 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="LC2621" class="line" lang="haskell"><span class="n" style="color: #333;">pp<span class="idiff left right">_c</span>ontext</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</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;">SDoc</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;">SDoc</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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<td class="diff-line-num new_line old" data-linenumber="2614" 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="LC2622" class="line" lang="haskell"><span class="n" style="color: #333;">pp<span class="idiff left right">_c</span>ontext</span> <span class="n" style="color: #333;">singular</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">_loc</span><span class="p">)</span> <span class="n" style="color: #333;">msg</span> <span class="n" style="color: #333;">rest_of_msg_fun</span></span>

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<td class="diff-line-num new new_line" data-linenumber="2614" 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="LC2614" class="line" lang="haskell"><span class="n" style="color: #333;">pp<span class="idiff left right">rC</span>ontext</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</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;">SDoc</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;">SDoc</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 new_line" data-linenumber="2615" 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="LC2615" class="line" lang="haskell"><span class="n" style="color: #333;">pp<span class="idiff left right">rC</span>ontext</span> <span class="n" style="color: #333;">singular</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">_loc</span><span class="p">)</span> <span class="n" style="color: #333;">msg</span> <span class="n" style="color: #333;">rest_of_msg_fun</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2623" style="width: 35px; color: rgba(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="2616" style="width: 35px; color: rgba(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="LC2616" class="line" lang="haskell">  <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;">text</span> <span class="n" style="color: #333;">txt</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">msg</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="2617" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2617

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<pre style="margin: 0;"> <span id="LC2617" class="line" lang="haskell">          <span class="n" style="color: #333;">sep</span> <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"In"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr_match</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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2625" style="width: 35px; color: rgba(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="2618" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2618

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<pre style="margin: 0;"> <span id="LC2618" class="line" lang="haskell">              <span class="p">,</span> <span class="n" style="color: #333;">nest</span> <span class="mi" style="color: #099;">4</span> <span class="p">(</span><span class="n" style="color: #333;">rest_of_msg_fun</span> <span class="n" style="color: #333;">pref</span><span class="p">)]]</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="2633" style="width: 35px; color: rgba(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="2626" style="width: 35px; color: rgba(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">@@ -2633,26 +2626,10 @@ pp_context singular (DsMatchContext kind _loc) msg rest_of_msg_fun</td>

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<td class="diff-line-num old_line" data-linenumber="2633" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2633

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<td class="diff-line-num new_line" data-linenumber="2626" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2626

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<pre style="margin: 0;"> <span id="LC2626" class="line" lang="haskell">                  <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">pprMatchContext</span> <span class="n" style="color: #333;">kind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">pp</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">fun</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">pp</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2634

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<td class="diff-line-num new_line" data-linenumber="2627" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2627

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<pre style="margin: 0;"> <span id="LC2627" class="line" lang="haskell">             <span class="kr" style="font-weight: 600;">_</span>    <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">pprMatchContext</span> <span class="n" style="color: #333;">kind</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="n" style="color: #333;">pp</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pp</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2635

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<td class="diff-line-num new_line" data-linenumber="2628" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2628

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<pre style="margin: 0;"> <span id="LC2628" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2636" 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">

2636

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<td class="diff-line-num new_line old" data-linenumber="2629" 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="LC2636" class="line" lang="haskell"><span class="n" style="color: #333;">ppr<span class="idiff left right">_p</span>ats</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;">Pat</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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2637" 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">

2637

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<td class="diff-line-num new_line old" data-linenumber="2629" 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="LC2637" class="line" lang="haskell"><span class="n" style="color: #333;">ppr<span class="idiff left right">_p</span>ats</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">pats</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2638" 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="2629" 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">

2629

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<pre style="margin: 0;">+<span id="LC2629" class="line" lang="haskell"><span class="n" style="color: #333;">ppr<span class="idiff left right">P</span>ats</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;">Pat</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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="2638" 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="2630" 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">

2630

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<pre style="margin: 0;">+<span id="LC2630" class="line" lang="haskell"><span class="n" style="color: #333;">ppr<span class="idiff left right">P</span>ats</span> <span class="n" style="color: #333;">kind</span> <span class="n" style="color: #333;">pats</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2638" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2638

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<td class="diff-line-num new_line" data-linenumber="2631" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2631

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<pre style="margin: 0;"> <span id="LC2631" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sep</span> <span class="p">[</span><span class="n" style="color: #333;">sep</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">pats</span><span class="p">),</span> <span class="n" style="color: #333;">matchSeparator</span> <span class="n" style="color: #333;">kind</span><span class="p">,</span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"..."</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2639" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2639

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<td class="diff-line-num new_line" data-linenumber="2632" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2632

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<pre style="margin: 0;"> <span id="LC2632" class="line" lang="haskell"></span>

</pre>

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

2640

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="LC2640" 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>

</pre>

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

2641

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="LC2641" 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>

</pre>

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

2642

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="LC2642" class="line" lang="haskell"></span>

</pre>

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

2643

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2644" 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">

2644

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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>

</pre>

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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

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<td class="diff-line-num new_line old" data-linenumber="2633" 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 old old_line" data-linenumber="2646" 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">

2646

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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="2633" 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><span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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 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="2633" 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;">complex</span><span class="p">)</span></span>

</pre>

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

2649

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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 old_line" data-linenumber="2650" 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">

2650

</td>

<td class="diff-line-num new_line old" data-linenumber="2633" 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="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 old_line" data-linenumber="2651" 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">

2651

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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 old_line" data-linenumber="2652" 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">

2652

</td>

<td class="diff-line-num new_line old" data-linenumber="2633" 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="LC2652" 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="2653" 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">

2653

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2654" 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">

2654

</td>

<td class="diff-line-num new_line old" data-linenumber="2633" 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="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;">filterComplex</span> <span class="n" style="color: #333;">complex</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="2655" 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">

2655

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<td class="diff-line-num new_line old" data-linenumber="2633" 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="LC2655" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2656" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2656

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<td class="diff-line-num new_line" data-linenumber="2633" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2633

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<pre style="margin: 0;"> <span id="LC2633" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Representation of Term Equalities]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2657" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2657

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<td class="diff-line-num new_line" data-linenumber="2634" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2634

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<pre style="margin: 0;"> <span id="LC2634" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="2658" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2658

</td>

<td class="diff-line-num new_line" data-linenumber="2635" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

2635

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<pre style="margin: 0;"> <span id="LC2635" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In the paper, term constraints always take the form (x ~ e). Of course, a more</span></span>

</pre>

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<br>

</li>

<li id="7589abbc710cc40f6e48245c2bc16d69f556b714">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#7589abbc710cc40f6e48245c2bc16d69f556b714"><strong>compiler/deSugar/PmExpr.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="6" style="width: 35px; color: rgba(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="6" style="width: 35px; color: rgba(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">@@ -6,12 +6,12 @@ Haskell expressions (as used by the pattern matching checker) and utilities.</td>

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6

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6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

7

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<td class="diff-line-num new_line" data-linenumber="7" style="width: 35px; color: rgba(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="LC7" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>

</pre>

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<td class="diff-line-num 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">

8

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<td class="diff-line-num 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">

8

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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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="9" 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="9" 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="LC9" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE GeneralisedNewtypeDeriving #-}</span></span>

</pre>

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<td class="diff-line-num 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">

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<td class="diff-line-num new_line" data-linenumber="10" style="width: 35px; color: rgba(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="LC10" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="10" style="width: 35px; color: rgba(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="LC11" 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>

</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="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>

</pre>

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

</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;">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>

</pre>

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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>

</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;">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;">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>

</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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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell">        <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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<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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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">substComplexEq</span></span>

</pre>

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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 class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new_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>

</pre>

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<pre style="margin: 0;"> <span id="LC17" 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>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="23" style="width: 35px; color: rgba(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="23" style="width: 35px; color: rgba(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">@@ -23,7 +23,6 @@ import FastString (FastString, unpackFS)</td>

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<pre style="margin: 0;"> <span id="LC23" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">HsSyn</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Id</span></span>

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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;">Name</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;">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>

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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="nf" style="color: #900; font-weight: 600;">isStringTy</span><span class="p">)</span></span>

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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="31" style="width: 35px; color: rgba(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">@@ -32,10 +31,6 @@ import Outputable</td>

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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>

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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>

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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;">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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<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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<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;">Control.Monad.Trans.State.Lazy</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC38" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC34" 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="LC35" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">%************************************************************************</span></span>

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<td class="diff-line-num old_line" data-linenumber="41" style="width: 35px; color: rgba(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 class="cm" style="color: #998; font-style: italic;">%*                                                                      *</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="61" style="width: 35px; color: rgba(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="56" style="width: 35px; color: rgba(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">@@ -61,7 +56,6 @@ refer to variables that are otherwise substituted away.</td>

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<pre style="margin: 0;"> <span id="LC56" 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="LC57" 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>

</pre>

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<pre style="margin: 0;"> <span id="LC58" 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="LC59" 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="LC60" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC61" 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>

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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">@@ -79,6 +73,16 @@ eqPmLit (PmOLit b1 l1) (PmOLit b2 l2) = b1 == b2 && l1 == l2</td>

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<pre style="margin: 0;"> <span id="LC73" 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="LC74" 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="LC75" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"><span class="cd">-- | Represents a match against a literal. We mostly use it to to encode shapes</span></span>

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<pre style="margin: 0;">+<span id="LC77" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- for a variable that immediately lead to a refutation.</span></span>

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<pre style="margin: 0;">+<span id="LC78" 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="LC79" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Refutable shapes] in TmOracle. Really similar to 'CoreSyn.AltCon'.</span></span>

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<pre style="margin: 0;">+<span id="LC80" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</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;">PmAltLit</span> <span class="kt" style="color: #458; font-weight: 600;">PmLit</span></span>

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<pre style="margin: 0;">+<span id="LC81" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="kt" style="color: #458; font-weight: 600;">Outputable</span></span>

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<pre style="margin: 0;">+<span id="LC82" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC83" 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="LC84" 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>

</pre>

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<pre style="margin: 0;">+<span id="LC85" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC86" 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="LC87" 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="LC88" 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="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">...</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 +149,6 @@ impact of this is the following:</td>

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<pre style="margin: 0;"> <span id="LC149" 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="LC150" 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="LC151" 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="LC152" class="line" lang="haskell"><span class="cd">-- | Term equalities</span></span>

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<pre style="margin: 0;"> <span id="LC153" 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="LC154" 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 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">...</td>

<td class="diff-line-num unfold js-unfold new_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">...</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 +157,6 @@ type ComplexEq = (PmExpr, PmExpr)</td>

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<pre style="margin: 0;"> <span id="LC157" 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>

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<pre style="margin: 0;"> <span id="LC158" 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>

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC159" class="line" lang="haskell"><span class="cd">-- | Expression `True'</span></span>

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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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<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>

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<pre style="margin: 0;">-<span id="LC162" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC163" class="line" lang="haskell"><span class="cd">-- | Expression `False'</span></span>

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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>

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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>

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

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<pre style="margin: 0;"> <span id="LC160" 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="LC161" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ** Predicates on PmExpr</span></span>

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<pre style="margin: 0;"> <span id="LC162" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_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">...</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">@@ -172,38 +165,6 @@ isNotPmExprOther :: PmExpr -> Bool</td>

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<pre style="margin: 0;"> <span id="LC165" class="line" lang="haskell"><span class="n" style="color: #333;">isNotPmExprOther</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;">False</span></span>

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<pre style="margin: 0;"> <span id="LC166" class="line" lang="haskell"><span class="n" style="color: #333;">isNotPmExprOther</span> <span class="n" style="color: #333;">_expr</span>           <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<pre style="margin: 0;"> <span id="LC167" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC175" class="line" lang="haskell"><span class="cd">-- | Check whether a literal is negated</span></span>

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<pre style="margin: 0;">-<span id="LC176" class="line" lang="haskell"><span class="n" style="color: #333;">isNegatedPmLit</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;">Bool</span></span>

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<pre style="margin: 0;">-<span id="LC177" 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>

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<pre style="margin: 0;">-<span id="LC178" 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>

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<pre style="margin: 0;">-<span id="LC179" class="line" lang="haskell"></span>

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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>

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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>

</pre>

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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="LC190" 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="LC191" 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="LC192" 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>

</pre>

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<pre style="margin: 0;">-<span id="LC193" 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>

</pre>

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<pre style="margin: 0;">-<span id="LC194" 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="LC203" class="line" lang="haskell"><span class="cd">-- | Check if a DataCon is (:).</span></span>

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<pre style="margin: 0;">-<span id="LC204" 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="LC205" 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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<pre style="margin: 0;">-<span id="LC206" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC168" 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="LC169" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ** Substitution in PmExpr</span></span>

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<pre style="margin: 0;"> <span id="LC170" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="216" style="width: 35px; color: rgba(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">@@ -216,9 +177,6 @@ substPmExpr x e1 e =</td>

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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 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="LC178" 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="LC179" 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="LC180" 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="LC181" 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="LC182" class="line" lang="haskell"></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="312" style="width: 35px; color: rgba(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="270" style="width: 35px; color: rgba(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">@@ -312,155 +270,23 @@ stringExprToList src s = foldr cons nil (map charToPmExpr (unpackFS s))</td>

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<pre style="margin: 0;"> <span id="LC270" 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="LC271" 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="LC272" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC315" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- 1. Literals</span></span>

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<pre style="margin: 0;">-<span id="LC316" 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="LC317" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Starting with a function definition like:</span></span>

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<pre style="margin: 0;">-<span id="LC318" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f :: Int -> Bool</span></span>

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<pre style="margin: 0;">-<span id="LC320" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f 5 = True</span></span>

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<pre style="margin: 0;">-<span id="LC321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f 6 = True</span></span>

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<pre style="margin: 0;">-<span id="LC322" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC323" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The uncovered set looks like:</span></span>

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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    { var |> False == (var == 5), False == (var == 6) }</span></span>

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<pre style="margin: 0;">-<span id="LC325" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC326" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Yet, we would like to print this nicely as follows:</span></span>

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<pre style="margin: 0;">-<span id="LC327" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   x , where x not one of {5,6}</span></span>

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<pre style="margin: 0;">-<span id="LC328" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC329" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Function `filterComplex' takes the set of residual constraints and packs</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC330" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">together the negative constraints that refer to the same variable so we can do</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC331" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">just this. Since these variables will be shown to the programmer, we also give</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC332" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">them better names (t1, t2, ..), hence the SDoc in PmNegLitCt.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC333" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC334" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Residual Constraints</span></span>

</pre>

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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>

</pre>

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<pre style="margin: 0;">-<span id="LC336" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Unhandled constraints that refer to HsExpr are typically ignored by the solver</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC337" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(it does not even substitute in HsExpr so they are even printed as wildcards).</span></span>

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<pre style="margin: 0;">-<span id="LC338" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Additionally, the oracle returns a substitution if it succeeds so we apply this</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC339" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitution to the vectors before printing them out (see function `pprOne' in</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC340" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Check.hs) to be more precice.</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC341" 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="LC342" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC343" 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 residual constraints in appropriate form for pretty printing</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC345" class="line" lang="haskell"></span>

</pre>

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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;">PmLit</span><span class="p">]))</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC347" 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;">filterComplex</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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;">PmNegLitCt</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;">filterComplex</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;">rename</span> <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;">mkGroup</span></span>

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

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<pre style="margin: 0;">-<span id="LC351" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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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>

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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>

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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>

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<pre style="margin: 0;">-<span id="LC355" 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>

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

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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>

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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>

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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>

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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>

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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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<pre style="margin: 0;">-<span id="LC361" class="line" lang="haskell"></span>

</pre>

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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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<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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<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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<pre style="margin: 0;">-<span id="LC365" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC366" 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="LC367" 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>

</pre>

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<pre style="margin: 0;">-<span id="LC368" 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>

</pre>

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<pre style="margin: 0;">-<span id="LC369" class="line" lang="haskell">                 <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="p">(</span><span class="sc" style="color: #d14;">'t'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">u</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">u</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[(</span><span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span><span class="o" style="font-weight: 600;">..</span><span class="p">]</span> <span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC370" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC371" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- ----------------------------------------------------------------------------</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC372" class="line" lang="haskell"></span>

</pre>

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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;">PmLit</span><span class="p">])])</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC374" 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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<pre style="margin: 0;">-<span id="LC375" 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="376" 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="LC376" 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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<pre style="margin: 0;">-<span id="LC377" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC378" class="line" lang="haskell">    <span class="n" style="color: #333;">is_used</span> <span class="p">(</span><span class="n" style="color: #333;">x</span><span class="p">,(</span><span class="n" style="color: #333;">name</span><span class="p">,</span> <span class="n" style="color: #333;">lits</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC379" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">elemNameSet</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">used</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;">name</span><span class="p">,</span> <span class="n" style="color: #333;">lits</span><span class="p">)</span></span>

</pre>

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

380

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC380" 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="381" 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">

381

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC381" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="382" 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">

382

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC382" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</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="kt" style="color: #458; font-weight: 600;">State</span> <span class="p">([</span><span class="kt" style="color: #458; font-weight: 600;">PmNegLitCt</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span><span class="p">)</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="383" 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">

383

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC383" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (the first part of the state is read only. make it a reader?)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="384" 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">

384

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC384" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="385" 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">

385

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<pre style="margin: 0;">-<span id="LC385" class="line" lang="haskell"><span class="n" style="color: #333;">addUsed</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;">PmPprM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="386" 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="LC386" class="line" lang="haskell"><span class="n" style="color: #333;">addUsed</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">modify</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">negated</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="p">(</span><span class="n" style="color: #333;">negated</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameSet</span> <span class="n" style="color: #333;">used</span> <span class="n" style="color: #333;">x</span><span class="p">))</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="387" 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">

387

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<pre style="margin: 0;">-<span id="LC387" class="line" lang="haskell"></span>

</pre>

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

388

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<pre style="margin: 0;">-<span id="LC388" class="line" lang="haskell"><span class="n" style="color: #333;">checkNegation</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;">PmPprM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- the clean name if it is negated</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="389" 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="LC389" class="line" lang="haskell"><span class="n" style="color: #333;">checkNegation</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="390" 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">

390

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<pre style="margin: 0;">-<span id="LC390" class="line" lang="haskell">  <span class="n" style="color: #333;">negated</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">gets</span> <span class="n" style="color: #333;">fst</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="391" 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">

391

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC391" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">negated</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="392" 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">

392

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<pre style="margin: 0;">-<span id="LC392" 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;">new</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="n" style="color: #333;">new</span></span>

</pre>

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

393

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<pre style="margin: 0;">-<span id="LC393" 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;">Nothing</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="394" 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">

394

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC394" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="395" 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">

395

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<pre style="margin: 0;">-<span id="LC395" class="line" lang="haskell"><span class="cd">-- | Pretty print a pmexpr, but remember to prettify the names of the variables</span></span>

</pre>

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396

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<pre style="margin: 0;">-<span id="LC396" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- that refer to neg-literals. The ones that cannot be shown are printed as</span></span>

</pre>

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

397

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<pre style="margin: 0;">-<span id="LC397" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- underscores.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="398" 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">

398

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<pre style="margin: 0;">-<span id="LC398" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</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;">PmPprM</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="399" 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">

399

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<pre style="margin: 0;">-<span id="LC399" 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;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="400" 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">

400

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<pre style="margin: 0;">-<span id="LC400" class="line" lang="haskell">  <span class="n" style="color: #333;">mb_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkNegation</span> <span class="n" style="color: #333;">x</span></span>

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<td class="diff-line-num old old_line" data-linenumber="401" 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">

401

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<pre style="margin: 0;">-<span id="LC401" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_name</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="402" 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">

402

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<pre style="margin: 0;">-<span id="LC402" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">addUsed</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">name</span></span>

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<td class="diff-line-num old old_line" data-linenumber="403" 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">

403

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<pre style="margin: 0;">-<span id="LC403" 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;">underscore</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="404" 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">

404

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<pre style="margin: 0;">-<span id="LC404" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="405" 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">

405

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<pre style="margin: 0;">-<span id="LC405" 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 old_line" data-linenumber="406" 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="LC406" 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">

407

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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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<td class="diff-line-num old old_line" data-linenumber="408" 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">

408

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<pre style="margin: 0;">-<span id="LC408" 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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="409" 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">

409

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<pre style="margin: 0;">-<span id="LC409" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="410" 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">

410

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<pre style="margin: 0;">-<span id="LC410" 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>

</pre>

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

411

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<pre style="margin: 0;">-<span id="LC411" 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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="412" 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="LC412" 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>

</pre>

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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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<td class="diff-line-num old old_line" data-linenumber="414" 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="LC414" 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 old old_line" data-linenumber="415" 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="LC415" 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="LC416" 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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<pre style="margin: 0;">-<span id="LC417" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">isConsDataCon</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">es</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="LC418" 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;">True</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC419" 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;">PatSynCon</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="n" style="color: #333;">es</span><span class="p">)</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;">null</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="LC420" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC421" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprWithParens</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;">PmPprM</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC422" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="423" 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="LC423" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">needsParens</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC424" 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;">pprPmExpr</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC425" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC426" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC427" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">con</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC428" 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;">con</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTuple</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC429" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <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;">pretty_list</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="430" 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">

430

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<pre style="margin: 0;">-<span id="LC430" 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="431" 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">

431

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<pre style="margin: 0;">-<span id="LC431" class="line" lang="haskell">    <span class="n" style="color: #333;">mkTuple</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="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="432" 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">

432

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<pre style="margin: 0;">-<span id="LC432" class="line" lang="haskell">    <span class="n" style="color: #333;">mkTuple</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span>     <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fsep</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="433" 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">

433

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<pre style="margin: 0;">-<span id="LC433" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="434" 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">

434

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<pre style="margin: 0;">-<span id="LC434" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- lazily, to be used in the list case only</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="435" 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">

435

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC435" class="line" lang="haskell">    <span class="n" style="color: #333;">pretty_list</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</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="436" 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">

436

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC436" class="line" lang="haskell">    <span class="n" style="color: #333;">pretty_list</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">isNilPmExpr</span> <span class="p">(</span><span class="n" style="color: #333;">last</span> <span class="n" style="color: #333;">list</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="437" 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">

437

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<pre style="margin: 0;">-<span id="LC437" 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="n" style="color: #333;">brackets</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fsep</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="n" style="color: #333;">init</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="438" 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">

438

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<pre style="margin: 0;">-<span id="LC438" 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="n" style="color: #333;">parens</span>   <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">hcat</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">list</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="439" 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">

439

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC439" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="440" 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">

440

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<pre style="margin: 0;">-<span id="LC440" class="line" lang="haskell">    <span class="n" style="color: #333;">list</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">list_elements</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="441" 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">

441

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<pre style="margin: 0;">-<span id="LC441" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="442" 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">

442

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC442" class="line" lang="haskell">    <span class="n" style="color: #333;">list_elements</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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="443" 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">

443

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<td class="diff-line-num new_line old" data-linenumber="273" 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="LC443" 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="n" style="color: #333;">c</span> <span class="n" style="color: #333;">es</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">y</span><span class="p">,</span>  <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">nilDataCon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="444" 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">

444

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<pre style="margin: 0;">-<span id="LC444" class="line" lang="haskell">          <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">es</span><span class="p">)</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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="445" 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">

445

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<pre style="margin: 0;">-<span id="LC445" 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="n" style="color: #333;">c</span> <span class="n" style="color: #333;">es</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">consDataCon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c</span></span>

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<pre style="margin: 0;">-<span id="LC446" 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;">list_elements</span> <span class="n" style="color: #333;">es</span></span>

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<pre style="margin: 0;">-<span id="LC447" 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="p">,</span><span class="n" style="color: #333;">y</span><span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC448" class="line" lang="haskell">    <span class="n" style="color: #333;">list_elements</span> <span class="n" style="color: #333;">list</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"list_elements:"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC449" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">args</span></span>

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<pre style="margin: 0;">-<span id="LC450" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">conLikeIsInfix</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">args</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">-<span id="LC451" class="line" lang="haskell">      <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="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">x'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">x</span></span>

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<pre style="margin: 0;">-<span id="LC452" class="line" lang="haskell">                   <span class="n" style="color: #333;">y'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">y</span></span>

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<pre style="margin: 0;">-<span id="LC453" class="line" lang="haskell">                   <span class="n" style="color: #333;">return</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;">ppr</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">y'</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC454" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- can it be infix but have more than two arguments?</span></span>

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<pre style="margin: 0;">-<span id="LC455" class="line" lang="haskell">      <span class="n" style="color: #333;">list</span>   <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"pprPmExprCon:"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC456" 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;">args</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;">cl</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC457" 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="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">args'</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;">args</span></span>

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<pre style="margin: 0;">-<span id="LC458" class="line" lang="haskell">                   <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">fsep</span> <span class="p">(</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;">args'</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC459" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC273" 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;">PmLit</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC274" 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;">PmSLit</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;">pmPprHsLit</span> <span class="n" style="color: #333;">l</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="462" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

462

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<td class="diff-line-num new_line" data-linenumber="275" style="width: 35px; color: rgba(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="LC275" 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;">PmOLit</span> <span class="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">l</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">neg</span> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">char</span> <span class="sc" style="color: #d14;">'-'</span> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">empty</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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="463" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

463

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<pre style="margin: 0;"> <span id="LC276" class="line" lang="haskell"></span>

</pre>

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464

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<td class="diff-line-num new_line old" data-linenumber="277" 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="LC464" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- not really useful for pmexprs per se</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="465" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

465

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<pre style="margin: 0;"> <span id="LC277" 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;">PmExpr</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="278" 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="LC466" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">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;">runPmPprM</span> <span class="p">(</span><span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">e</span><span class="p">)</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span></pre>

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<pre style="margin: 0;">+<span id="LC278" class="line" lang="haskell">  <span class="n" style="color: #333;">ppr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="p">(</span><span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="279" 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="LC279" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC280" class="line" lang="haskell">      <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">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;">ppr</span> <span class="n" style="color: #333;">l</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC281" class="line" lang="haskell">      <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprVar</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;">ppr</span> <span class="n" style="color: #333;">v</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="282" 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="LC282" class="line" lang="haskell">      <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprOther</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;">angleBrackets</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">e</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC283" class="line" lang="haskell">      <span class="n" style="color: #333;">go</span> <span class="kr" style="font-weight: 600;">_</span>    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PmExprCon</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">dc</span><span class="p">)</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="284" 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="LC284" 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;">dc</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">comma_sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC285" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">dc</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;">brackets</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">comma_sep</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">ppr</span> <span class="p">(</span><span class="n" style="color: #333;">list_cells</span> <span class="n" style="color: #333;">args</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC286" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC287" class="line" lang="haskell">          <span class="n" style="color: #333;">comma_sep</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fsep</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC288" class="line" lang="haskell">          <span class="n" style="color: #333;">list_cells</span> <span class="p">(</span><span class="n" style="color: #333;">hd</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">tl</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">hd</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">list_cells</span> <span class="n" style="color: #333;">tl</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC289" class="line" lang="haskell">          <span class="n" style="color: #333;">list_cells</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;">[]</span></span>

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<pre style="margin: 0;">+<span id="LC290" class="line" lang="haskell">      <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">prec</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="n" style="color: #333;">args</span><span class="p">)</span></span>

</pre>

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291

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<pre style="margin: 0;">+<span id="LC291" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">cparen</span> <span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">args</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">prec</span> <span class="o" style="font-weight: 600;">></span> <span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">hcat</span> <span class="p">(</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;">map</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="mi" style="color: #099;">1</span><span class="p">)</span> <span class="n" style="color: #333;">args</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC292" class="line" lang="haskell"></span></pre>

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<br>

</li>

<li id="584407121afc66978c814dbdb5c252118d27656a">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#584407121afc66978c814dbdb5c252118d27656a"><strong>compiler/deSugar/PmPpr.hs</strong></a>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="cd">-- | Provides factilities for pretty-printing 'PmExpr's in a way approriate for</span></span>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- user facing pattern match warnings.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">PmPpr</span> <span class="p">(</span></span>

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">pprUncovered</span></span>

</pre>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell">    <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>

</pre>

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9

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<pre style="margin: 0;">+<span id="LC9" 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>

</pre>

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10

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

</pre>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GhcPrelude</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Name</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">NameEnv</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">NameSet</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">UniqDFM</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">UniqSet</span></span>

</pre>

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18

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<pre style="margin: 0;">+<span id="LC18" 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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19

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">DataCon</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC20" 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="LC21" 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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22

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Trans.State.Strict</span></span>

</pre>

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23

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<pre style="margin: 0;">+<span id="LC23" 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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<td class="diff-line-num new new_line" data-linenumber="24" 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">

24

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<pre style="margin: 0;">+<span id="LC24" 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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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>

</pre>

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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;">TmOracle</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="cd">-- | Pretty-print the guts of an uncovered value vector abstraction, i.e., its</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- components and refutable shapes associated to any mentioned variables.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Example for @([Just p, q], [p :-> [3,4], q :-> [0,5]]):</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (Just p) q</span></span>

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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--     where p is not one of {3, 4}</span></span>

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--           q is not one of {0, 5}</span></span>

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<pre style="margin: 0;">+<span id="LC37" 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="LC38" class="line" lang="haskell"><span class="n" style="color: #333;">pprUncovered</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;">PmRefutEnv</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="LC39" class="line" lang="haskell"><span class="n" style="color: #333;">pprUncovered</span> <span class="p">(</span><span class="n" style="color: #333;">expr_vec</span><span class="p">,</span> <span class="n" style="color: #333;">refuts</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC40" 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>

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<pre style="margin: 0;">+<span id="LC41" 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>

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<pre style="margin: 0;">+<span id="LC42" 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;">pprRefutableShapes</span> <span class="n" style="color: #333;">cs</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">+<span id="LC44" 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="LC45" 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;">runPmPpr</span> <span class="n" style="color: #333;">sdoc_vec</span> <span class="p">(</span><span class="n" style="color: #333;">prettifyRefuts</span> <span class="n" style="color: #333;">refuts</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="cd">-- | Output refutable shapes of a variable in the form of @var is not one of {2,</span></span>

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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Nothing, 3}@.</span></span>

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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"><span class="n" style="color: #333;">pprRefutableShapes</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>

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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"><span class="n" style="color: #333;">pprRefutableShapes</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>

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<pre style="margin: 0;">+<span id="LC51" 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>

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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC53" 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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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- 1. Literals</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC56" 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="LC57" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Starting with a function definition like:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC58" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC59" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f :: Int -> Bool</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC60" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f 5 = True</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC61" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    f 6 = True</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC62" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC63" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The uncovered set looks like:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC64" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    { var |> var /= 5, var /= 6 }</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC65" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC66" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Yet, we would like to print this nicely as follows:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   x , where x not one of {5,6}</span></span>

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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Since these variables will be shown to the programmer, we give them better names</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC70" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(t1, t2, ..) in 'prettifyRefuts', hence the SDoc in 'PrettyPmRefutEnv'.</span></span>

</pre>

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71

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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"></span>

</pre>

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72

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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">2. Residual Constraints</span></span>

</pre>

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73

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<pre style="margin: 0;">+<span id="LC73" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="74" 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">

74

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<pre style="margin: 0;">+<span id="LC74" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Unhandled constraints that refer to HsExpr are typically ignored by the solver</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="75" 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">

75

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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">(it does not even substitute in HsExpr so they are even printed as wildcards).</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="76" 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">

76

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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Additionally, the oracle returns a substitution if it succeeds so we apply this</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC77" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">substitution to the vectors before printing them out (see function `pprOne' in</span></span>

</pre>

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78

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<pre style="margin: 0;">+<span id="LC78" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Check.hs) to be more precise.</span></span>

</pre>

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79

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<pre style="margin: 0;">+<span id="LC79" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

</pre>

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80

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<pre style="margin: 0;">+<span id="LC80" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC81" class="line" lang="haskell"><span class="cd">-- | A 'PmRefutEnv' with pretty names for the occuring variables.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC82" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</span> <span class="kt" style="color: #458; font-weight: 600;">PrettyPmRefutEnv</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">DNameEnv</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;">PmAltCon</span><span class="p">])</span></span>

</pre>

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83

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<pre style="margin: 0;">+<span id="LC83" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC84" class="line" lang="haskell"><span class="cd">-- | Assigns pretty names to constraint variables in the domain of the given</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC85" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'PmRefutEnv'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC86" class="line" lang="haskell"><span class="n" style="color: #333;">prettifyRefuts</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;">PrettyPmRefutEnv</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC87" class="line" lang="haskell"><span class="n" style="color: #333;">prettifyRefuts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">listToUDFM</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">zipWith</span> <span class="n" style="color: #333;">rename</span> <span class="n" style="color: #333;">nameList</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">udfmToList</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="88" 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="LC88" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC89" 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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90

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<pre style="margin: 0;">+<span id="LC90" 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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<td class="diff-line-num new new_line" data-linenumber="91" 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">

91

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<pre style="margin: 0;">+<span id="LC91" 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>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="92" 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="LC92" 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>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="93" 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="LC93" class="line" lang="haskell">                 <span class="p">[</span> <span class="n" style="color: #333;">text</span> <span class="p">(</span><span class="sc" style="color: #d14;">'t'</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">show</span> <span class="n" style="color: #333;">u</span><span class="p">)</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">u</span> <span class="o" style="font-weight: 600;"><-</span> <span class="p">[(</span><span class="mi" style="color: #099;">0</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span><span class="o" style="font-weight: 600;">..</span><span class="p">]</span> <span class="p">]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="94" 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">

94

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<pre style="margin: 0;">+<span id="LC94" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC95" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</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="kt" style="color: #458; font-weight: 600;">State</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PrettyPmRefutEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NameSet</span><span class="p">)</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="96" 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">

96

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<pre style="margin: 0;">+<span id="LC96" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (the first part of the state is read only. make it a reader?)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="97" 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">

97

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<pre style="margin: 0;">+<span id="LC97" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="98" 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="LC98" class="line" lang="haskell"><span class="n" style="color: #333;">runPmPpr</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="kt" style="color: #458; font-weight: 600;">PrettyPmRefutEnv</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;">PmAltCon</span><span class="p">])])</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC99" class="line" lang="haskell"><span class="n" style="color: #333;">runPmPpr</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="p">(</span><span class="n" style="color: #333;">udfmToList</span> <span class="n" style="color: #333;">lit_env</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC100" 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="101" 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="LC101" 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 new new_line" data-linenumber="102" 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="LC102" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_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">

103

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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell">    <span class="n" style="color: #333;">is_used</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>

</pre>

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

104

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<pre style="margin: 0;">+<span id="LC104" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">elemUniqSet_Directly</span> <span class="n" style="color: #333;">k</span> <span class="n" style="color: #333;">used</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;">v</span></span>

</pre>

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

105

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<pre style="margin: 0;">+<span id="LC105" 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="LC106" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"><span class="n" style="color: #333;">addUsed</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;">PmPprM</span> <span class="nb" style="color: #0086b3;">()</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"><span class="n" style="color: #333;">addUsed</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">modify</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">negated</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="p">(</span><span class="n" style="color: #333;">negated</span><span class="p">,</span> <span class="n" style="color: #333;">extendNameSet</span> <span class="n" style="color: #333;">used</span> <span class="n" style="color: #333;">x</span><span class="p">))</span></span>

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109

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

</pre>

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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="n" style="color: #333;">checkNegation</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;">PmPprM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- the clean name if it is negated</span></span>

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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell"><span class="n" style="color: #333;">checkNegation</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC112" class="line" lang="haskell">  <span class="n" style="color: #333;">negated</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">gets</span> <span class="n" style="color: #333;">fst</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC113" class="line" lang="haskell">  <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupDNameEnv</span> <span class="n" style="color: #333;">negated</span> <span class="n" style="color: #333;">x</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">+<span id="LC114" 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;">new</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="n" style="color: #333;">new</span></span>

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<pre style="margin: 0;">+<span id="LC115" 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;">Nothing</span></span>

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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"><span class="cd">-- | Pretty print a pmexpr, but remember to prettify the names of the variables</span></span>

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<pre style="margin: 0;">+<span id="LC118" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- that refer to neg-literals. The ones that cannot be shown are printed as</span></span>

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<pre style="margin: 0;">+<span id="LC119" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- underscores.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC120" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExpr</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;">PmPprM</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

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<pre style="margin: 0;">+<span id="LC121" 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;">PmExprVar</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>

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<pre style="margin: 0;">+<span id="LC122" class="line" lang="haskell">  <span class="n" style="color: #333;">mb_name</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">checkNegation</span> <span class="n" style="color: #333;">x</span></span>

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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="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_name</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="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">

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<pre style="margin: 0;">+<span id="LC124" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">name</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">addUsed</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">>></span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">name</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="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;">underscore</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">

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<pre style="margin: 0;">+<span id="LC126" 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 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="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 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="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>

</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">

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<pre style="margin: 0;">+<span id="LC129" class="line" lang="haskell"></span>

</pre>

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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;">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>

</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;">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>

</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">

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<pre style="margin: 0;">+<span id="LC132" 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>

</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">

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<pre style="margin: 0;">+<span id="LC133" 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>

</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">

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<pre style="margin: 0;">+<span id="LC134" 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>

</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">

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<pre style="margin: 0;">+<span id="LC135" 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>

</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="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">isConsDataCon</span> <span class="n" style="color: #333;">c</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">es</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 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="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;">True</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;">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;">PatSynCon</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="n" style="color: #333;">es</span><span class="p">)</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;">null</span> <span class="n" style="color: #333;">es</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">

139

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<pre style="margin: 0;">+<span id="LC139" class="line" lang="haskell"></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">

140

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<pre style="margin: 0;">+<span id="LC140" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprWithParens</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;">PmPprM</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</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 class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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

142

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<pre style="margin: 0;">+<span id="LC142" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">needsParens</span> <span class="n" style="color: #333;">expr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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

143

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<pre style="margin: 0;">+<span id="LC143" 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;">pprPmExpr</span> <span class="n" style="color: #333;">expr</span></span>

</pre>

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

144

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<pre style="margin: 0;">+<span id="LC144" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_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">

145

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<pre style="margin: 0;">+<span id="LC145" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ConLike</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</span> <span class="kt" style="color: #458; font-weight: 600;">SDoc</span></span>

</pre>

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

146

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<pre style="margin: 0;">+<span id="LC146" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">con</span><span class="p">)</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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

147

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<pre style="margin: 0;">+<span id="LC147" 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;">con</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkTuple</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">args</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="o" style="font-weight: 600;">|</span> <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;">pretty_list</span></span>

</pre>

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

149

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<pre style="margin: 0;">+<span id="LC149" 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="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="n" style="color: #333;">mkTuple</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="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 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="n" style="color: #333;">mkTuple</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parens</span>     <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fsep</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span></span>

</pre>

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<td class="diff-line-num new new_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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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"></span>

</pre>

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

153

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<pre style="margin: 0;">+<span id="LC153" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- lazily, to be used in the list case only</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="154" 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="LC154" class="line" lang="haskell">    <span class="n" style="color: #333;">pretty_list</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">PmPprM</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="0" 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="155" 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="LC155" class="line" lang="haskell">    <span class="n" style="color: #333;">pretty_list</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">isNilPmExpr</span> <span class="p">(</span><span class="n" style="color: #333;">last</span> <span class="n" style="color: #333;">list</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC156" 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="n" style="color: #333;">brackets</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">fsep</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">comma</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="p">(</span><span class="n" style="color: #333;">init</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC157" 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="n" style="color: #333;">parens</span>   <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">hcat</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">punctuate</span> <span class="n" style="color: #333;">colon</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">pprPmExpr</span> <span class="n" style="color: #333;">list</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="158" 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="LC158" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_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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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell">    <span class="n" style="color: #333;">list</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">list_elements</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="160" 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">

160

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<pre style="margin: 0;">+<span id="LC160" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC161" class="line" lang="haskell">    <span class="n" style="color: #333;">list_elements</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>

</pre>

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<td class="diff-line-num new new_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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<pre style="margin: 0;">+<span id="LC162" 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="n" style="color: #333;">c</span> <span class="n" style="color: #333;">es</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">y</span><span class="p">,</span>  <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">nilDataCon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c</span></span>

</pre>

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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="kt" style="color: #458; font-weight: 600;">ASSERT</span><span class="p">(</span><span class="n" style="color: #333;">null</span> <span class="n" style="color: #333;">es</span><span class="p">)</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>

</pre>

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<pre style="margin: 0;">+<span id="LC164" 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="n" style="color: #333;">c</span> <span class="n" style="color: #333;">es</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">y</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">RealDataCon</span> <span class="n" style="color: #333;">consDataCon</span> <span class="o" style="font-weight: 600;">==</span> <span class="n" style="color: #333;">c</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="165" 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="LC165" 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;">list_elements</span> <span class="n" style="color: #333;">es</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="166" 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="LC166" 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="p">,</span><span class="n" style="color: #333;">y</span><span class="p">]</span></span>

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<td class="diff-line-num new new_line" data-linenumber="167" 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="LC167" class="line" lang="haskell">    <span class="n" style="color: #333;">list_elements</span> <span class="n" style="color: #333;">list</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"list_elements:"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="168" 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="LC168" class="line" lang="haskell"><span class="n" style="color: #333;">pprPmExprCon</span> <span class="n" style="color: #333;">cl</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="169" 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="LC169" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">conLikeIsInfix</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">args</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="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">

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<pre style="margin: 0;">+<span id="LC170" class="line" lang="haskell">      <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="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">x'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="171" 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="LC171" class="line" lang="haskell">                   <span class="n" style="color: #333;">y'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">pprPmExprWithParens</span> <span class="n" style="color: #333;">y</span></span>

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<pre style="margin: 0;">+<span id="LC172" class="line" lang="haskell">                   <span class="n" style="color: #333;">return</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;">ppr</span> <span class="n" style="color: #333;">cl</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">y'</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- can it be infix but have more than two arguments?</span></span>

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<pre style="margin: 0;">+<span id="LC174" class="line" lang="haskell">      <span class="n" style="color: #333;">list</span>   <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pprPanic</span> <span class="s" style="color: #d14;">"pprPmExprCon:"</span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">list</span><span class="p">)</span></span>

</pre>

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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;">null</span> <span class="n" style="color: #333;">args</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;">cl</span><span class="p">)</span></span>

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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="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">args'</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;">args</span></span>

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<pre style="margin: 0;">+<span id="LC177" class="line" lang="haskell">                   <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">fsep</span> <span class="p">(</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;">args'</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC178" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC179" class="line" lang="haskell"><span class="cd">-- | Check whether a literal is negated</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC180" class="line" lang="haskell"><span class="n" style="color: #333;">isNegatedPmLit</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;">Bool</span></span>

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<pre style="margin: 0;">+<span id="LC181" 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>

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<pre style="margin: 0;">+<span id="LC182" 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>

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<pre style="margin: 0;">+<span id="LC183" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell"><span class="cd">-- | Check whether a PmExpr is syntactically e</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC185" 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="LC186" 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="LC187" 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="LC188" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC189" class="line" lang="haskell"><span class="cd">-- | Check if a DataCon is (:).</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC190" 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>

</pre>

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

191

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<pre style="margin: 0;">+<span id="LC191" 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></pre>

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<br>

</li>

<li id="379674a5063221cec43f0f659c2eb67b30339f45">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#379674a5063221cec43f0f659c2eb67b30339f45"><strong>compiler/deSugar/TmOracle.hs</strong></a>

<hr>

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1

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1

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<pre style="margin: 0;"> <span id="LC1" 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="LC2" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Author: George Karachalias <george.karachalias@cs.kuleuven.be></span></span>

</pre>

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3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="haskell"></span>

</pre>

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4

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The term equality oracle. The main export of the module is function `tmOracle'.</span></span>

</pre>

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5

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3

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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>

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4

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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell"></span>

</pre>

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5

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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP, MultiWayIf #-}</span></span>

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8

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6

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cd">-- | The term equality oracle. The main export of the module are the functions</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'tmOracle', 'solveOneEq' and 'addSolveRefutableAltCon'.</span></span>

</pre>

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9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- If you are looking for an oracle that can solve type-level constraints, look</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- at 'TcSimplify.tcCheckSatisfiability'.</span></span>

</pre>

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9

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<pre style="margin: 0;"> <span id="LC12" 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>

</pre>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- re-exported from PmExpr</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;">SimpleEq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">falsePmExpr</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="13" 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">

13

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<td class="diff-line-num new_line old" data-linenumber="15" 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;">eqPmLit</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">filterComplex</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;">runPmPprM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">lhsExprToPmExpr</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="14" 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">

14

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<td class="diff-line-num new_line old" data-linenumber="15" 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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<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">

</td>

<td class="diff-line-num new new_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">

15

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<pre style="margin: 0;">+<span id="LC15" 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;">SimpleEq</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">ComplexEq</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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<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">

</td>

<td class="diff-line-num new new_line" data-linenumber="16" 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">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</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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<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">

15

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<td class="diff-line-num new_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">

17

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<pre style="margin: 0;"> <span id="LC17" 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">

16

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<td class="diff-line-num new_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

18

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<pre style="margin: 0;"> <span id="LC18" 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 old_line" data-linenumber="17" 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">

17

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<td class="diff-line-num new_line old" data-linenumber="19" 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="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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<td class="diff-line-num new old_line" data-linenumber="18" 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="19" 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">

19

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<pre style="margin: 0;">+<span id="LC19" 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;">wrapUpTmState</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">solveOneEq</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="18" 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="20" 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="LC20" class="line" lang="haskell">        <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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<td class="diff-line-num new old_line" data-linenumber="18" 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="21" 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="LC21" 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 old_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

18

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<td class="diff-line-num new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

22

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

<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_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">

19

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<td class="diff-line-num new_line" data-linenumber="23" style="width: 35px; color: rgba(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="LC23" 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 old old_line" data-linenumber="20" 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">

20

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<td class="diff-line-num new_line old" data-linenumber="24" 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="LC20" 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 class="idiff left">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">flattenPmVarEnv</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="21" 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="24" 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="LC24" 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>

</pre>

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<td class="diff-line-num old_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">

21

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<td class="diff-line-num new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

25

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="haskell">    <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

22

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<td class="diff-line-num new_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">

26

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

<pre style="margin: 0;"> <span id="LC26" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="23" style="width: 35px; color: rgba(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="LC27" 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 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">...</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 +36,9 @@ import Type</td>

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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;">HsLit</span></span>

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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;">TcHsSyn</span></span>

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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;">MonadUtils</span></span>

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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;">ListSetOps</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">insertNoDup</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">unionLists</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC40" 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="LC41" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Maybes</span></span>

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<pre style="margin: 0;"> <span id="LC42" 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="LC43" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC44" 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="diff-line-num unfold js-unfold old_line" data-linenumber="48" style="width: 35px; color: rgba(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="54" style="width: 35px; color: rgba(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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<pre style="margin: 0;"> <span id="LC54" class="line" lang="haskell"><span class="cd">-- | The type of substitutions.</span></span>

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<pre style="margin: 0;"> <span id="LC55" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</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;">NameEnv</span> <span class="kt" style="color: #458; font-weight: 600;">PmExpr</span></span>

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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC51" 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="LC52" 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="LC57" 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="LC58" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- refutation. So, if this maps @x :-> [Just]@, then trying to solve a</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;">-- 'ComplexEq' like @x ~ Just False@ immediately leads to a contradiction.</span></span>

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<pre style="margin: 0;">+<span id="LC60" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Determinism is important since we use this for warning messages in</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;">-- 'PmPpr.pprUncovered'. We don't do the same for 'PmVarEnv', so that is a plain</span></span>

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<pre style="margin: 0;">+<span id="LC62" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'NameEnv'.</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;">--</span></span>

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<pre style="margin: 0;">+<span id="LC64" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See also Note [Refutable shapes] in TmOracle.</span></span>

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<pre style="margin: 0;">+<span id="LC65" 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="kt" style="color: #458; font-weight: 600;">DNameEnv</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="LC66" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC67" class="line" lang="haskell"><span class="cd">-- | The state of the term oracle. Tracks all term-level facts we know,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC68" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- giving special treatment to constraints of the form "x is @True@" ('tm_pos')</span></span>

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<pre style="margin: 0;">+<span id="LC69" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and "x is not @5@" ('tm_neg').</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;">--</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC71" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Subject to Note [The Pos/Neg invariant].</span></span>

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<pre style="margin: 0;">+<span id="LC72" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</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;">TmS</span></span>

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<pre style="margin: 0;">+<span id="LC73" class="line" lang="haskell">  <span class="p">{</span> <span class="n" style="color: #333;">tm_facts</span>   <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</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="LC74" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- ^ Complex equalities we may assume to hold. We have not (yet) brought them</span></span>

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<pre style="margin: 0;">+<span id="LC75" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- into a form leading to a contradiction or a 'SimpleEq'. Otherwise, we would</span></span>

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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- store the 'SimpleEq' as a solution in the 'tm_pos' env, where it could be</span></span>

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<pre style="margin: 0;">+<span id="LC77" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- used to simplify other equations. All 'ComplexEq's are fully substituted</span></span>

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<pre style="margin: 0;">+<span id="LC78" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- according to (i.e., fixed-points under) 'tm_pos'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC79" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">tm_pos</span>     <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">PmVarEnv</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC80" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- ^ A substitution with solutions we extend with every step and return as a</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC81" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- result. Think of it as any 'ComplexEq' from 'tm_facts' we managed to</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;">-- bring into the form of a 'SimpleEq'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC83" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Contrary to 'tm_facts', the substitution is in /triangular form/: It might</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;">-- map @x@ to @y@ where @y@ itself occurs in the domain of 'tm_pos', rendering</span></span>

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<pre style="margin: 0;">+<span id="LC85" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- lookup non-idempotent. This means that 'varDeepLookup' potentially has to</span></span>

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<pre style="margin: 0;">+<span id="LC86" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- walk along a chain of var-to-var mappings until we find the solution but</span></span>

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<pre style="margin: 0;">+<span id="LC87" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- has the advantage that when we update the solution for @y@ above, we</span></span>

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<pre style="margin: 0;">+<span id="LC88" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- automatically update the solution for @x@ in a union-find-like fashion.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC89" class="line" lang="haskell">  <span class="p">,</span> <span class="n" style="color: #333;">tm_neg</span>     <span class="o" style="font-weight: 600;">::</span> <span class="o" style="font-weight: 600;">!</span><span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</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;">-- ^ Maps each variable @x@ to a list of 'PmAltCon's that @x@ definitely</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;">-- cannot match. Example, @x :-> [3, 4]@ means that @x@ cannot match a literal</span></span>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- 3 or 4. Should we later solve @x@ to a variable @y@</span></span>

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<pre style="margin: 0;">+<span id="LC93" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- ('extendSubstAndSolve'), we merge the refutable shapes of @x@ into those of</span></span>

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<pre style="margin: 0;">+<span id="LC94" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- @y@. See also Note [The Pos/Neg invariant].</span></span>

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

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<pre style="margin: 0;">+<span id="LC96" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC97" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [The Pos/Neg invariant]</span></span>

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<pre style="margin: 0;">+<span id="LC98" 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="LC99" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Invariant: In any 'TmState', The domains of 'tm_pos' and 'tm_neg' are disjoint.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC100" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC101" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">For example, it would make no sense to say both</span></span>

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<pre style="margin: 0;">+<span id="LC102" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    tm_pos = [...x :-> 3 ...]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC103" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    tm_neg = [...x :-> [3,42]... ]</span></span>

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<pre style="margin: 0;">+<span id="LC104" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">The positive information is strictly more informative than the negative.</span></span>

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<pre style="margin: 0;">+<span id="LC105" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC106" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Suppose we are adding the (positive) fact @x :-> e@ to 'tm_pos'. Then we must</span></span>

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<pre style="margin: 0;">+<span id="LC107" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">delete any binding for @x@ from 'tm_neg', to uphold the invariant.</span></span>

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<pre style="margin: 0;">+<span id="LC108" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC109" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">But there is more! Suppose we are adding @x :-> y@ to 'tm_pos', and 'tm_neg'</span></span>

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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">contains @x :-> cs, y :-> ds@. Then we want to update 'tm_neg' to</span></span>

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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">@y :-> (cs ++ ds)@, to make use of the negative information we have about @x@.</span></span>

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<pre style="margin: 0;">+<span id="LC112" 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="LC113" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC114" class="line" lang="haskell"><span class="cd">-- | Initial state of the oracle.</span></span>

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<pre style="margin: 0;">+<span id="LC115" 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="LC116" 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;">TmS</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">emptyNameEnv</span> <span class="n" style="color: #333;">emptyDNameEnv</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC117" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC118" class="line" lang="haskell"><span class="cd">-- | Wrap up the term oracle's state once solving is complete. Drop any</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC119" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- information about non-simple constraints and flatten (height 1) the</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC120" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- substitution.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC121" 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;">PmVarEnv</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">PmRefutEnv</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC122" class="line" lang="haskell"><span class="n" style="color: #333;">wrapUpTmState</span> <span class="n" style="color: #333;">solver_state</span></span>

</pre>

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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="p">(</span><span class="n" style="color: #333;">flattenPmVarEnv</span> <span class="p">(</span><span class="n" style="color: #333;">tm_pos</span> <span class="n" style="color: #333;">solver_state</span><span class="p">),</span> <span class="n" style="color: #333;">tm_neg</span> <span class="n" style="color: #333;">solver_state</span><span class="p">)</span></span>

</pre>

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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="cd">-- | Flatten the triangular subsitution.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC126" 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>

</pre>

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<pre style="margin: 0;">+<span id="LC127" 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>

</pre>

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<pre style="margin: 0;"> <span id="LC128" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"><span class="cd">-- | Check whether a constraint (x ~ BOT) can succeed,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- given the resulting state of the term oracle.</span></span>

</pre>

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58

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<pre style="margin: 0;"> <span id="LC131" 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>

</pre>

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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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">_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 right">))</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC132" class="line" lang="haskell"><span class="n" style="color: #333;">canDiverge</span> <span class="n" style="color: #333;">x</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">TmS</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tm_pos</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">pos</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tm_facts</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">facts</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="60" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

60

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<td class="diff-line-num new_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">

133

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<pre style="margin: 0;"> <span id="LC133" 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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="61" 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">

61

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<td class="diff-line-num new_line old" data-linenumber="134" 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="LC61" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- constraint x ~ BOT to be satisfiable.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="62" 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">

62

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

</pre>

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<td class="diff-line-num new old_line" data-linenumber="63" 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="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="c1" style="color: #998; font-style: italic;">-- constraint x ~ BOT to be satisfiable. That's the case when we haven't found</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="63" 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="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">

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<pre style="margin: 0;">+<span id="LC135" 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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="63" 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="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">

136

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<pre style="margin: 0;">+<span id="LC136" 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;">pos</span> <span class="n" style="color: #333;">x</span> <span class="c1" style="color: #998; font-style: italic;">-- seems not forced</span></span>

</pre>

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63

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<td class="diff-line-num new_line" data-linenumber="137" style="width: 35px; color: rgba(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="LC137" 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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="64" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

64

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<td class="diff-line-num new_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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<pre style="margin: 0;"> <span id="LC138" 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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="65" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

65

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<td class="diff-line-num new_line" data-linenumber="139" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

139

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<pre style="margin: 0;"> <span id="LC139" 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>

</pre>

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66

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<td class="diff-line-num new_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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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- that the constraint is satisfiable.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="67" 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="141" 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="LC67" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">isForcedByEq</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;"><span class="idiff left">standby</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">any</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">isForcedByEq</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">standby</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">any</span> <span class="p">(</span><span class="n" style="color: #333;">isForcedByEq</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;"><span class="idiff left">facts</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">any</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">isForcedByEq</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">y</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">facts</span></span></span>

</pre>

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68

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<td class="diff-line-num new_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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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- Variable x is already in WHNF so the constraint is non-satisfiable</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="69" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

69

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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="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;">False</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="70" 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">

70

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<td class="diff-line-num new_line old" 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">

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<pre style="margin: 0;">-<span id="LC70" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="71" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

71

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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="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell">    <span class="n" style="color: #333;">isForcedByEq</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;">ComplexEq</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="LC146" class="line" lang="haskell">    <span class="n" style="color: #333;">isForcedByEq</span> <span class="n" style="color: #333;">y</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="n" style="color: #333;">varIn</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">e1</span> <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">varIn</span> <span class="n" style="color: #333;">y</span> <span class="n" style="color: #333;">e2</span></span>

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<pre style="margin: 0;"> <span id="LC151" 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="LC152" 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="LC153" 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="LC154" 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="LC155" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC84" 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="LC85" 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="LC86" 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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<pre style="margin: 0;">-<span id="LC87" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC88" class="line" lang="haskell"><span class="cd">-- | The state of the term oracle (includes complex constraints that cannot</span></span>

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<pre style="margin: 0;">-<span id="LC89" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- progress unless we get more information).</span></span>

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<pre style="margin: 0;">-<span id="LC90" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">type</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;">ComplexEq</span><span class="p">],</span> <span class="kt" style="color: #458; font-weight: 600;">TmOracleEnv</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC91" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC92" class="line" lang="haskell"><span class="cd">-- | Initial state of the oracle.</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="93" 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">

93

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<td class="diff-line-num new_line old" data-linenumber="156" 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="LC93" 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>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="94" 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">

94

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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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="95" 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="LC156" class="line" lang="haskell"><span class="cd">-- | Check whether the equality @x ~ e@ leads to a refutation. Make sure that</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="95" 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="157" 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="LC157" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @x@ and @e@ are completely substituted before!</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="95" 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="158" 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">

158

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<pre style="margin: 0;">+<span id="LC158" 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>

</pre>

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<td class="diff-line-num new new_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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<pre style="margin: 0;">+<span id="LC159" 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>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="95" 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="160" 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="LC160" 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;">lookupDNameEnv</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="161" style="width: 35px; color: rgba(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="LC161" 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="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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<pre style="margin: 0;"> <span id="LC162" 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="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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<pre style="margin: 0;"> <span id="LC163" 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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<td class="diff-line-num old old_line" data-linenumber="98" 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="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="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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<td class="diff-line-num old old_line" data-linenumber="99" 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="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="LC99" 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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<td class="diff-line-num old old_line" data-linenumber="100" 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="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="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 old_line" data-linenumber="101" 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="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="LC101" 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 new old_line" data-linenumber="102" 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="164" 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="LC164" 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="kt" style="color: #458; font-weight: 600;">TmS</span><span class="p">{</span> <span class="n" style="color: #333;">tm_pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pos</span> <span class="p">}</span> <span class="n" style="color: #333;">complex</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="102" 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="165" 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="LC165" 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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<td class="diff-line-num new old_line" data-linenumber="102" 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="166" 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">

166

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<pre style="margin: 0;">+<span id="LC166" 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;">pos</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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167

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell"></span>

</pre>

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

168

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<pre style="margin: 0;">+<span id="LC168" 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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<td class="diff-line-num new new_line" data-linenumber="169" 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">

169

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<pre style="margin: 0;">+<span id="LC169" 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="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="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="171" 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">

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 new new_line" data-linenumber="172" 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">

172

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<pre style="margin: 0;">+<span id="LC172" 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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173

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- 'TmState' and return @Nothing@ if that leads to a contradiction.</span></span>

</pre>

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<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">

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<pre style="margin: 0;">+<span id="LC174" 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="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="n" style="color: #333;">addSolveRefutableAltCon</span> <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;">TmS</span><span class="p">{</span> <span class="n" style="color: #333;">tm_pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pos</span><span class="p">,</span> <span class="n" style="color: #333;">tm_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</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="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="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="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="c1" style="color: #998; font-style: italic;">-- We have to take care to preserve Note [The Pos/Neg invariant]</span></span>

</pre>

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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">

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<pre style="margin: 0;">+<span id="LC178" 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="179" 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="LC179" 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 old_line" data-linenumber="102" 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="180" 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="LC180" 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="181" 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">

181

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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="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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<pre style="margin: 0;">+<span id="LC182" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span>                                <span class="c1" style="color: #998; font-style: italic;">--     refutation redundant</span></span>

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<pre style="margin: 0;">+<span id="LC183" 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;">pos</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>

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<pre style="margin: 0;">+<span id="LC184" class="line" lang="haskell">    <span class="n" style="color: #333;">extended</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">original</span> <span class="p">{</span> <span class="n" style="color: #333;">tm_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg'</span> <span class="p">}</span></span>

</pre>

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185

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<pre style="margin: 0;">+<span id="LC185" class="line" lang="haskell">    <span class="n" style="color: #333;">neg'</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">alterDNameEnv</span> <span class="p">(</span><span class="n" style="color: #333;">delNulls</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="n" style="color: #333;">neg</span> <span class="n" style="color: #333;">y</span></span>

</pre>

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186

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

</pre>

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<pre style="margin: 0;">+<span id="LC187" class="line" lang="haskell"><span class="cd">-- | When updating 'tm_neg', we want to delete any 'null' entries. This adapter</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC188" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- intends to provide a suitable interface for 'alterDNameEnv'.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC189" class="line" lang="haskell"><span class="n" style="color: #333;">delNulls</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 class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</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="kt" style="color: #458; font-weight: 600;">Maybe</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="LC190" class="line" lang="haskell"><span class="n" style="color: #333;">delNulls</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">mb_entry</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC191" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">ret</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><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="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">fromMaybe</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">mb_entry</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="n" style="color: #333;">ret</span></span>

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<pre style="margin: 0;">+<span id="LC192" 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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<pre style="margin: 0;">+<span id="LC193" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC194" 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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<pre style="margin: 0;">+<span id="LC195" 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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<pre style="margin: 0;">+<span id="LC196" 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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<pre style="margin: 0;">+<span id="LC197" class="line" lang="haskell"><span class="n" style="color: #333;">lookupRefutableAltCons</span> <span class="n" style="color: #333;">x</span> <span class="kt" style="color: #458; font-weight: 600;">TmS</span> <span class="p">{</span> <span class="n" style="color: #333;">tm_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</span> <span class="p">}</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC198" 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;">lookupDNameEnv</span> <span class="n" style="color: #333;">neg</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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<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">-- | Solve a complex equality.</span></span>

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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">

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Nothing => definitely unsatisfiable</span></span>

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<td class="diff-line-num unfold js-unfold 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">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="203" style="width: 35px; color: rgba(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">@@ -106,10 +203,10 @@ solveOneEq solver_env@(_,(_,env)) complex</td>

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<pre style="margin: 0;"> <span id="LC203" 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>

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--             satisfiable</span></span>

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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">

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<pre style="margin: 0;"> <span id="LC205" 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>

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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 class="idiff left">@</span></span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">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 right">))</span></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>

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<pre style="margin: 0;">+<span id="LC206" class="line" lang="haskell"><span class="n" style="color: #333;">solveComplexEq</span> <span class="n" style="color: #333;">solver_state</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>

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<pre style="margin: 0;"> <span id="LC207" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- We cannot do a thing about these cases</span></span>

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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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">True</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 right">))</span></span></span>

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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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">True</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 right">))</span></span></span>

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<pre style="margin: 0;">+<span id="LC208" 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="n" style="color: #333;"><span class="idiff left right">solver_state</span></span></span>

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<pre style="margin: 0;">+<span id="LC209" 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="n" style="color: #333;"><span class="idiff left right">solver_state</span></span></span>

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<pre style="margin: 0;"> <span id="LC210" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC211" 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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<pre style="margin: 0;"> <span id="LC212" 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="216" style="width: 35px; color: rgba(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 +216,6 @@ solveComplexEq solver_state@(standby, (unhandled, env)) eq@(e1, e2) = case eq of</td>

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<pre style="margin: 0;"> <span id="LC216" 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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<pre style="margin: 0;"> <span id="LC217" 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="LC218" 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="LC219" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC220" 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="LC221" 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="224" style="width: 35px; color: rgba(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 +224,66 @@ solveComplexEq solver_state@(standby, (unhandled, env)) eq@(e1, e2) = case eq of</td>

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<td class="diff-line-num new_line" data-linenumber="224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

224

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<pre style="margin: 0;"> <span id="LC224" 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>

</pre>

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<td class="diff-line-num old_line" data-linenumber="134" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

134

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<td class="diff-line-num new_line" data-linenumber="225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

225

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<pre style="margin: 0;"> <span id="LC225" 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="226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

226

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<pre style="margin: 0;"> <span id="LC226" class="line" lang="haskell"></span>

</pre>

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<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="227" 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="227" 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="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="227" style="width: 35px; color: rgba(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="LC227" 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="228" 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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">True</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 right">))</span></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">

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<td class="diff-line-num new new_line" data-linenumber="228" 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="LC228" class="line" lang="haskell">       <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;"><span class="idiff left right">solver_state</span></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="229" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

229

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<pre style="margin: 0;"> <span id="LC229" 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="230" style="width: 35px; color: rgba(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="LC230" 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="231" style="width: 35px; color: rgba(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="LC231" 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>

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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="232" 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="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="232" 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">

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<td class="diff-line-num new new_line" data-linenumber="232" 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="LC232" 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="kt" style="color: #458; font-weight: 600;">TmS</span><span class="p">{</span> <span class="n" style="color: #333;">tm_facts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">facts</span><span class="p">,</span> <span class="n" style="color: #333;">tm_pos</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">pos</span><span class="p">,</span> <span class="n" style="color: #333;">tm_neg</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</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">

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<td class="diff-line-num new new_line" data-linenumber="233" 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="LC233" 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;">neg</span> <span class="c1" style="color: #998; font-style: italic;">-- NB: e'</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">

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<td class="diff-line-num new new_line" data-linenumber="234" 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="LC234" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="235" 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">

235

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<pre style="margin: 0;">+<span id="LC235" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="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="236" 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">

236

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<pre style="margin: 0;">+<span id="LC236" 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="237" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

237

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<pre style="margin: 0;"> <span id="LC237" 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="238" style="width: 35px; color: rgba(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="LC238" 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="239" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

239

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<pre style="margin: 0;"> <span id="LC239" 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="240" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

240

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<pre style="margin: 0;"> <span id="LC240" 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="241" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

241

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<pre style="margin: 0;"> <span id="LC241" 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 old_line" 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">

150

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<td class="diff-line-num new_line old" data-linenumber="242" 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="LC150" 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="242" 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="242" 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="LC242" 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;">facts</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="243" 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="LC243" class="line" lang="haskell">    <span class="n" style="color: #333;">new_pos</span>              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extendNameEnv</span> <span class="n" style="color: #333;">pos</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">e</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="244" 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="LC244" class="line" lang="haskell"></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="245" 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="LC245" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Be careful to uphold Note [The Pos/Neg invariant] by adjusting 'tm_neg'</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="246" 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="LC246" 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;">new_pos</span> <span class="n" style="color: #333;">x</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="247" 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="LC247" class="line" lang="haskell">    <span class="n" style="color: #333;">neg'</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 class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">neg</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="248" 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="LC248" 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="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">lookupDNameEnv</span> <span class="n" style="color: #333;">neg</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 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="249" 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="LC249" 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;">neg</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC250" class="line" lang="haskell">                             <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">nalts</span> <span class="o" style="font-weight: 600;">-></span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="251" 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="LC251" class="line" lang="haskell">                               <span class="n" style="color: #333;">alterDNameEnv</span> <span class="p">(</span><span class="n" style="color: #333;">delNulls</span> <span class="p">(</span><span class="n" style="color: #333;">unionLists</span> <span class="n" style="color: #333;">nalts</span><span class="p">))</span> <span class="n" style="color: #333;">neg</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="252" 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="LC252" class="line" lang="haskell">    <span class="n" style="color: #333;">new_neg</span>              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">delFromDNameEnv</span> <span class="n" style="color: #333;">neg'</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="253" 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="LC253" class="line" lang="haskell">    <span class="n" style="color: #333;">new_incr_state</span>       <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">TmS</span> <span class="n" style="color: #333;">unchanged</span> <span class="n" style="color: #333;">new_pos</span> <span class="n" style="color: #333;">new_neg</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC255" 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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<pre style="margin: 0;"> <span id="LC256" 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>

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<pre style="margin: 0;">-<span id="LC155" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">`extendSubst`</span> simply extends the substitution, unlike what</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC156" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">`extendSubstAndSolve`</span> does.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">@extendSubst@</span> simply extends the substitution, unlike what</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC258" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- <span class="idiff left right">'extendSubstAndSolve'</span> does.</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC259" 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>

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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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">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 right">))</span></span></span>

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<pre style="margin: 0;">+<span id="LC260" 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="n" style="color: #333;"><span class="idiff left">solver_state</span></span><span class="o" style="font-weight: 600;"><span class="idiff">@</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">TmS</span></span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tm_pos</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">pos</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span></span>

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<pre style="margin: 0;"> <span id="LC261" 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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<pre style="margin: 0;">-<span id="LC160" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="p"><span class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">unhandled</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">extendNameEnv</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="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">simpl_e</span></span><span class="p"><span class="idiff right">))</span></span></span>

</pre>

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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 class="idiff left">(</span></span><span class="n" style="color: #333;"><span class="idiff">standby</span></span><span class="p"><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">True</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 right">))</span></span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="262" 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="LC262" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">solver_state</span></span><span class="idiff"> </span><span class="p"><span class="idiff">{</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">tm_pos</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">extendNameEnv</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pos</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">x</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">simpl_e</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">}</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="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="263" 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="LC263" 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;"><span class="idiff left right">solver_state</span></span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="264" style="width: 35px; color: rgba(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="LC264" 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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<pre style="margin: 0;"> <span id="LC265" 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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<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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<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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<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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<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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<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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<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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<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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<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">

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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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<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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<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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<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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<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>

</pre>

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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>

</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">-- | 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>

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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>

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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>

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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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<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>

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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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<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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<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>

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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>

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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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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="266" 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">

204

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<td class="diff-line-num new_line old" data-linenumber="266" 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="266" 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">

206

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<td class="diff-line-num new_line old" data-linenumber="266" 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="266" 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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<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">

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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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<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="266" 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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<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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<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="266" 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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<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="266" 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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<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="266" 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">

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<td class="diff-line-num new_line old" data-linenumber="266" 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">

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<td class="diff-line-num new_line old" data-linenumber="266" 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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<td class="diff-line-num new_line old" data-linenumber="266" 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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<td class="diff-line-num new old_line" data-linenumber="222" 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="266" 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="LC266" 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;">pos</span> <span class="n" style="color: #333;">e</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="222" style="width: 35px; color: rgba(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="LC267" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC268" 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="LC269" 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="LC270" 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="LC271" 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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<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="LC272" 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="LC273" 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="LC274" 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="LC275" 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="LC276" 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="LC277" 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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<pre style="margin: 0;">+<span id="LC278" 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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<pre style="margin: 0;">+<span id="LC279" 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>

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<pre style="margin: 0;">+<span id="LC280" 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>

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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# INLINE varDeepLookup #-}</span></span>

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<pre style="margin: 0;"> <span id="LC282" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC283" class="line" lang="haskell"><span class="cd">-- | Apply an (un-flattened) substitution to an expression.</span></span>

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<pre style="margin: 0;"> <span id="LC284" 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>

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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>

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<pre style="margin: 0;">+<span id="LC285" 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>

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<pre style="margin: 0;"> <span id="LC286" 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>

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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>

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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>

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<pre style="margin: 0;"> <span id="LC287" 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>

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<pre style="margin: 0;"> <span id="LC288" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC289" class="line" lang="haskell"><span class="cd">-- | External interface to the term oracle.</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="248" style="width: 35px; color: rgba(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="295" style="width: 35px; color: rgba(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">@@ -248,18 +295,49 @@ pmLitType :: PmLit -> Type -- should be in PmExpr but gives cyclic imports :(</td>

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<pre style="margin: 0;"> <span id="LC295" 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="LC296" 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>

</pre>

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- Note [Refutable shapes]</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC299" 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="LC300" class="line" lang="haskell"></span>

</pre>

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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>

</pre>

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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>

</pre>

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<pre style="margin: 0;">+<span id="LC301" 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="LC302" class="line" lang="haskell"></span>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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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>

</pre>

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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="LC303" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    foo x</span></span>

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<pre style="margin: 0;">+<span id="LC304" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | 0 <- x = 42</span></span>

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<pre style="margin: 0;">+<span id="LC305" 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="LC306" 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="LC307" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">      | otherwise = 45</span></span>

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<pre style="margin: 0;">+<span id="LC308" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC309" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">This will result in the following initial matching problem:</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC310" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC311" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    PatVec: x     (0 <- x)</span></span>

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<pre style="margin: 0;">+<span id="LC312" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    ValVec: $tm_y</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC313" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC314" 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 the value</span></span>

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<pre style="margin: 0;">+<span id="LC315" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">vector abstraction. When we handle the first pattern guard in Check, it will be</span></span>

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<pre style="margin: 0;">+<span id="LC316" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">desugared to a match of the form</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC317" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC318" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    PatVec: x     0</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">    ValVec: $tm_y x</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC320" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC321" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">In LitVar, this will split the value vector abstraction for `x` into a positive</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC322" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`PmLit 0` and a negative `PmLit x [0]` value abstraction. While the former is</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC323" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">immediately matched against the pattern vector, the latter (vector value</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC324" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">abstraction `~[0] $tm_y`) is completely uncovered by the clause.</span></span>

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<pre style="margin: 0;">+<span id="LC325" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC326" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`pmcheck` proceeds by *discarding* the the value vector abstraction involving</span></span>

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<pre style="margin: 0;">+<span id="LC327" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the guard to accomodate for the desugaring. But this also discards the valuable</span></span>

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<pre style="margin: 0;">+<span id="LC328" 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="LC329" 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="LC330" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC331" 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="LC332" 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. Now the</span></span>

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<pre style="margin: 0;">+<span id="LC333" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">term oracle can immediately refute the constraint `x ~ 0` generated by the</span></span>

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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">second clause and report the clause as redundant. After the third clause, the</span></span>

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<pre style="margin: 0;">+<span id="LC335" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">set of such *refutable* literals is again extended to `[0, 1]`.</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="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="LC338" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">variable. That's the purpose of the `PmRefutEnv`. `addSolveRefutableAltCon` will</span></span>

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<pre style="margin: 0;">+<span id="LC339" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">add such a refutable mapping to the `PmRefutEnv` in the term oracles state and</span></span>

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<pre style="margin: 0;">+<span id="LC340" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">check if causes any immediate contradiction. Whenever we record a solution in</span></span>

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<pre style="margin: 0;">+<span id="LC341" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the substitution via `extendSubstAndSolve`, the refutable environment is checked</span></span>

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<pre style="margin: 0;">+<span id="LC342" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">for any matching refutable `PmAltCon`.</span></span>

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<pre style="margin: 0;">+<span id="LC343" 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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<li id="0f33fd88c617246c7f89c4477d2d1d24f942df23">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#0f33fd88c617246c7f89c4477d2d1d24f942df23"><strong>compiler/ghc.cabal.in</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="324" style="width: 35px; color: rgba(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="324" style="width: 35px; color: rgba(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">@@ -324,6 +324,7 @@ Library</td>

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<pre style="margin: 0;"> <span id="LC324" class="line" lang="plaintext">        MkCore</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="325" style="width: 35px; color: rgba(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="LC325" class="line" lang="plaintext">        PprCore</span>

</pre>

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<pre style="margin: 0;"> <span id="LC326" class="line" lang="plaintext">        PmExpr</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="327" 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="LC327" class="line" lang="plaintext">        PmPpr</span>

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<pre style="margin: 0;"> <span id="LC328" class="line" lang="plaintext">        TmOracle</span>

</pre>

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<pre style="margin: 0;"> <span id="LC329" class="line" lang="plaintext">        Check</span>

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<pre style="margin: 0;"> <span id="LC330" class="line" lang="plaintext">        Coverage</span>

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<li id="2cbc08c5f3b1dcbc9c763a836b51491224c05e50">

<a href="https://gitlab.haskell.org/ghc/ghc/commit/5ccfbb4069ee9e9bb35bf7b81a3de0f2c09eaf9d#2cbc08c5f3b1dcbc9c763a836b51491224c05e50"><strong>compiler/utils/ListSetOps.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_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">...</td>

<td class="diff-line-num unfold js-unfold 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">...</td>

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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>

</pre>

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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>

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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;">-- Duplicate handling</span></span>

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<td class="diff-line-num old old_line" data-linenumber="17" 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="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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<td class="diff-line-num new old_line" data-linenumber="18" 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="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 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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<td class="diff-line-num old_line" data-linenumber="18" style="width: 35px; color: rgba(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="18" style="width: 35px; color: rgba(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="LC18" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">equivClasses</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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<td class="diff-line-num old_line" data-linenumber="20" style="width: 35px; color: rgba(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="LC20" 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="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">...</td>

<td class="diff-line-num unfold js-unfold 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">...</td>

<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 +169,10 @@ findDupsEq _  [] = []</td>

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169

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<pre style="margin: 0;"> <span id="LC169" 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>

</pre>

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170

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<td class="diff-line-num new_line" data-linenumber="170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

170

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<pre style="margin: 0;"> <span id="LC170" 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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<td class="diff-line-num old_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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<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 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>

</pre>

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

172

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

</pre>

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<td class="diff-line-num new old_line" data-linenumber="172" 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="173" 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">

173

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<pre style="margin: 0;">+<span id="LC173" class="line" lang="haskell"><span class="cd">-- | \( O(n) \). @'insertNoDup' x xs@ treats @xs@ as a set, inserting @x@ only</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="172" 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="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="c1" style="color: #998; font-style: italic;">-- when an equal element couldn't be found in @xs@.</span></span>

</pre>

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<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="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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<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="n" style="color: #333;">insertNoDup</span> <span class="n" style="color: #333;">x</span> <span class="n" style="color: #333;">set</span></span>

</pre>

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

</pre>

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<td class="diff-line-num new old_line" data-linenumber="172" 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;">otherwise</span>                  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">set</span></span></pre>

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