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<h3>

 Marge Bot pushed to branch master

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/e8a5d81b9358466f8889f679bfea9f796d85f7f3">e8a5d81b</a></strong>

<div>

<span>by Jonathan DK Gibbons</span>

<i>at 2020-04-22T23:10:28-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor the `MatchResult` type in the desugarer

This way, it does a better job of proving whether or not the fail operator is used.

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dcb7fe5aa2bc331fa71b537b042ec08a7c79b1ac">dcb7fe5a</a></strong>

<div>

<span>by John Ericson</span>

<i>at 2020-04-22T23:10:28-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove panic in dsHandleMonadicFailure

Rework dsHandleMonadicFailure to be correct by construction instead of

using an unreachable panic.

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cde23cd47170cc33845b6859a47dd06ee85094d8">cde23cd4</a></strong>

<div>

<span>by John Ericson</span>

<i>at 2020-04-22T23:10:28-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Inline `adjustMatchResult`

It is just `fmap`

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/72cb6bcc23d2540274aac7d1b80682ef092f1615">72cb6bcc</a></strong>

<div>

<span>by John Ericson</span>

<i>at 2020-04-22T23:10:28-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Generalize type of `matchCanFail`

</pre>

</li>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/401f7bb312aa6c570287d313f8b587aaebca72b2">401f7bb3</a></strong>

<div>

<span>by John Ericson</span>

<i>at 2020-04-22T23:10:28-04:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">`MatchResult'` -> `MatchResult`

Inline `MatchResult` alias accordingly.

</pre>

</li>

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<h4>9 changed files:</h4>

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<li class="file-stats">

<a href="#6bdd5abc649727f2a802bc96ce5c276de19d3726">

compiler/GHC/HsToCore/Expr.hs

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<li class="file-stats">

<a href="#0f81db91b67c3e47ac75aa942ac3aa080f676036">

compiler/GHC/HsToCore/Expr.hs-boot

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<a href="#83f0b13548ac43fe13b1813fb407249ff9b825f7">

compiler/GHC/HsToCore/GuardedRHSs.hs

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<li class="file-stats">

<a href="#085703923f9c18f6ac9f926ac9a4c7c7e6d9d9ed">

compiler/GHC/HsToCore/Match.hs

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<li class="file-stats">

<a href="#7c474b472edbb70d6316b45cccdb0c78321e94d3">

compiler/GHC/HsToCore/Match.hs-boot

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<li class="file-stats">

<a href="#b370399ae1ab68e37f0e631d98a45da6df9f011c">

compiler/GHC/HsToCore/Match/Constructor.hs

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<li class="file-stats">

<a href="#f017e4c978a9ff341ce5a7b838787fd2a4758b59">

compiler/GHC/HsToCore/Match/Literal.hs

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<li class="file-stats">

<a href="#c8a27621f82549165d8946ae8e9f467660958059">

compiler/GHC/HsToCore/Monad.hs

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<li class="file-stats">

<a href="#94864be2e2eb1959a038d5d903a6c784e5cfb32a">

compiler/GHC/HsToCore/Utils.hs

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<h4>Changes:</h4>

<li id="6bdd5abc649727f2a802bc96ce5c276de19d3726">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#6bdd5abc649727f2a802bc96ce5c276de19d3726"><strong>compiler/GHC/HsToCore/Expr.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1014" style="width: 35px; color: rgba(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="1014" style="width: 35px; color: rgba(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">@@ -1014,26 +1014,26 @@ dsDo stmts</td>

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<td class="diff-line-num old_line" data-linenumber="1014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1014

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<td class="diff-line-num new_line" data-linenumber="1014" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1014

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<pre style="margin: 0;"> <span id="LC1014" 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;">ParStmt</span>   <span class="p">{})</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"dsDo ParStmt"</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1015

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<td class="diff-line-num new_line" data-linenumber="1015" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1015

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<pre style="margin: 0;"> <span id="LC1015" 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;">TransStmt</span> <span class="p">{})</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"dsDo TransStmt"</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1016

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<td class="diff-line-num new_line" data-linenumber="1016" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1016

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<pre style="margin: 0;"> <span id="LC1016" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1017" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1017

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<td class="diff-line-num new_line old" data-linenumber="1017" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC1017" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="o" style="font-weight: 600;">::</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FailOperator</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1018" style="width: 35px; color: rgba(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="1017" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1017

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<pre style="margin: 0;">+<span id="LC1017" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="o" style="font-weight: 600;">::</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FailOperator</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1018" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1018

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<td class="diff-line-num new_line" data-linenumber="1018" style="width: 35px; color: rgba(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="LC1018" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- In a do expression, pattern-match failure just calls</span></span>

</pre>

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1019

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<td class="diff-line-num new_line" data-linenumber="1019" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1019

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<pre style="margin: 0;"> <span id="LC1019" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- the monadic 'fail' rather than throwing an exception</span></span>

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<td class="diff-line-num old old_line" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1020

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<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC1020" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">match</span> <span class="n" style="color: #333;">m_fail_op</span></span>

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<td class="diff-line-num old old_line" data-linenumber="1021" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1021

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<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC1021" class="line" lang="haskell">  <span class="o" style="font-weight: 600;"><span class="idiff left">|</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">matchCanFail</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">do</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1022" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1022

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<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC1022" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">fail_op</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><-</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">case</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m_fail_op</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">of</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1023

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<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC1023" class="line" lang="haskell">    <span class="idiff left">  </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Note that (non-monadic) list comprehension, pattern guards, etc could</span></span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1024

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1024" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- have fallible bindings without an explicit failure op, but this is</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1025" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1025

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1025" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- handled elsewhere. See Note [Failing pattern matches in Stmts] the</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1026" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1026

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1026" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- breakdown of regular and special binds.</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1027" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1027

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1027" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Nothing</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">pprPanic</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"missing fail op"</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1028" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1028

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1028" class="line" lang="haskell">        <span class="n" style="color: #333;"><span class="idiff left">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"Pattern match:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pat</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right"><+></span></span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1029" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1029

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1029" class="line" lang="haskell">        <span class="n" style="color: #333;"><span class="idiff left">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"is failable, and fail_expr was left unset"</span></span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1030" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1030

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1030" class="line" lang="haskell">      <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail_op</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">pure</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail_op</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old old_line" data-linenumber="1031" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1031

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1031" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">dflags</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 right">getDynFlags</span></span></span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1032" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1032

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1032" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">fail_msg</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">mkStringExpr</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mk_fail_msg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pat</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

</td>

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

<td class="diff-line-num old old_line" data-linenumber="1033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1033

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1033" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">fail_expr</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">dsSyntaxExpr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail_op</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="n" style="color: #333;"><span class="idiff">fail_msg</span></span><span class="p"><span class="idiff right">]</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1034" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1034

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

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<pre style="margin: 0;">-<span id="LC1034" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">extractMatchResult</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail_expr</span></span></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1035" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1035

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1035" class="line" lang="haskell">  <span class="o" style="font-weight: 600;"><span class="idiff left">|</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">otherwise</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">=</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old old_line" data-linenumber="1036" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1036

</td>

<td class="diff-line-num new_line old" data-linenumber="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

</td>

<td class="line_content old" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#fbe9eb">

<pre style="margin: 0;">-<span id="LC1036" class="line" lang="haskell">    <span class="n" style="color: #333;"><span class="idiff left">extractMatchResult</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">error</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"It can't fail"</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1020" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1020

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1020" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">match</span> <span class="n" style="color: #333;">m_fail_op</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">=</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1021" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1021

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1021" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;"><span class="idiff left">case</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">shareFailureHandler</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">of</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1022" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1022

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1022" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MR_Infallible</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body</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 right">body</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1023" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1023

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1023" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MR_Fallible</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">do</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1024" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1024

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1024" class="line" lang="haskell">      <span class="n" style="color: #333;"><span class="idiff left">fail_op</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff"><-</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">case</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m_fail_op</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">of</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1025" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1025

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1025" class="line" lang="haskell">      <span class="idiff left">  </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- Note that (non-monadic) list comprehension, pattern guards, etc could</span></span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1026" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1026

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1026" class="line" lang="haskell">      <span class="idiff left">  </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- have fallible bindings without an explicit failure op, but this is</span></span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1027" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1027

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1027" class="line" lang="haskell">      <span class="idiff left">  </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- handled elsewhere. See Note [Failing pattern matches in Stmts] the</span></span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1028" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1028

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1028" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;"><span class="idiff left right">-- breakdown of regular and special binds.</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1029" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1029

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1029" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Nothing</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">pprPanic</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"missing fail op"</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1030" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1030

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1030" class="line" lang="haskell">      <span class="idiff left">    </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff">"Pattern match:"</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">ppr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pat</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right"><+></span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1031" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1031

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1031" class="line" lang="haskell">    <span class="idiff left">      </span><span class="n" style="color: #333;"><span class="idiff">text</span></span><span class="idiff"> </span><span class="s" style="color: #d14;"><span class="idiff right">"is failable, and fail_expr was left unset"</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1032" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1032

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1032" class="line" lang="haskell">    <span class="idiff left">    </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Just</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail_op</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">pure</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail_op</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1033" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1033

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1033" class="line" lang="haskell">    <span class="idiff left">  </span><span class="n" style="color: #333;"><span class="idiff">dflags</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 right">getDynFlags</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1034" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1034

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1034" class="line" lang="haskell">    <span class="idiff left">  </span><span class="n" style="color: #333;"><span class="idiff">fail_msg</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">mkStringExpr</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mk_fail_msg</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">dflags</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pat</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1035" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1035

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1035" class="line" lang="haskell">  <span class="idiff left">    </span><span class="n" style="color: #333;"><span class="idiff">fail_expr</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">dsSyntaxExpr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail_op</span></span><span class="idiff"> </span><span class="p"><span class="idiff">[</span></span><span class="n" style="color: #333;"><span class="idiff">fail_msg</span></span><span class="p"><span class="idiff right">]</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num new old_line" data-linenumber="1037" style="width: 35px; color: rgba(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="1036" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1036

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1036" class="line" lang="haskell">    <span class="idiff left">  </span><span class="n" style="color: #333;"><span class="idiff">body</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail_expr</span></span></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1037" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1037

</td>

<td class="diff-line-num new_line" data-linenumber="1037" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1037

</td>

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

<pre style="margin: 0;"> <span id="LC1037" class="line" lang="haskell"></span>

</pre>

</td>

</tr>

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

<td class="diff-line-num old_line" data-linenumber="1038" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1038

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1038

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<pre style="margin: 0;"> <span id="LC1038" class="line" lang="haskell"><span class="n" style="color: #333;">mk_fail_msg</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;">Located</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">String</span></span>

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1039

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1039

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<pre style="margin: 0;"> <span id="LC1039" class="line" lang="haskell"><span class="n" style="color: #333;">mk_fail_msg</span> <span class="n" style="color: #333;">dflags</span> <span class="n" style="color: #333;">pat</span> <span class="o" style="font-weight: 600;">=</span> <span class="s" style="color: #d14;">"Pattern match failure in do expression at "</span> <span class="o" style="font-weight: 600;">++</span></span>

</pre>

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<li id="0f81db91b67c3e47ac75aa942ac3aa080f676036">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#0f81db91b67c3e47ac75aa942ac3aa080f676036"><strong>compiler/GHC/HsToCore/Expr.hs-boot</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -9,4 +9,4 @@ dsLExpr, dsLExprNoLP :: LHsExpr GhcTc -> DsM CoreExpr</td>

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9

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9

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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"><span class="n" style="color: #333;">dsSyntaxExpr</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SyntaxExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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10

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10

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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">dsLocalBinds</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">LHsLocalBinds</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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11

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11

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"></span>

</pre>

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12

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="o" style="font-weight: 600;">::</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FailOperator</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span></pre>

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12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">dsHandleMonadicFailure</span> <span class="o" style="font-weight: 600;">::</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="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff right"> </span><span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">FailOperator</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span></pre>

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<li id="83f0b13548ac43fe13b1813fb407249ff9b825f7">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#83f0b13548ac43fe13b1813fb407249ff9b825f7"><strong>compiler/GHC/HsToCore/GuardedRHSs.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="52" style="width: 35px; color: rgba(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="52" style="width: 35px; color: rgba(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">@@ -52,7 +52,7 @@ dsGuarded grhss rhs_ty mb_rhss_deltas = do</td>

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52

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52

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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell">    <span class="n" style="color: #333;">error_expr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkErrorAppDs</span> <span class="n" style="color: #333;">nON_EXHAUSTIVE_GUARDS_ERROR_ID</span> <span class="n" style="color: #333;">rhs_ty</span> <span class="n" style="color: #333;">empty</span></span>

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53

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<td class="diff-line-num new_line" data-linenumber="53" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

53

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<pre style="margin: 0;"> <span id="LC53" class="line" lang="haskell">    <span class="n" style="color: #333;">extractMatchResult</span> <span class="n" style="color: #333;">match_result</span> <span class="n" style="color: #333;">error_expr</span></span>

</pre>

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54

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<td class="diff-line-num 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">

54

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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="c1" style="color: #998; font-style: italic;">-- In contrast, @dsGRHSs@ produces a @MatchResult@.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- In contrast, @dsGRHSs@ produces a @MatchResult<span class="idiff left right"> CoreExpr</span>@.</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"><span class="n" style="color: #333;">dsGRHSs</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;">GhcRn</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;">GRHSs</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</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;">-- ^ Guarded RHSs</span></span>

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

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

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -60,7 +60,7 @@ dsGRHSs :: HsMatchContext GhcRn</td>

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<pre style="margin: 0;"> <span id="LC60" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Maybe</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Deltas</span><span class="p">)</span>     <span class="c1" style="color: #998; font-style: italic;">-- ^ Refined pattern match checking</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;">--   models, one for each GRHS. Defaults</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;">--   to 'initDeltas' if 'Nothing'.</span></span>

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<pre style="margin: 0;">-<span id="LC63" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC63" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"><span class="n" style="color: #333;">dsGRHSs</span> <span class="n" style="color: #333;">hs_ctx</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHSs</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">grhss</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="n" style="color: #333;">rhs_ty</span> <span class="n" style="color: #333;">mb_rhss_deltas</span></span>

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<pre style="margin: 0;"> <span id="LC65" 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;">notNull</span> <span class="n" style="color: #333;">grhss</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC66" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">match_results</span> <span class="o" style="font-weight: 600;"><-</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mb_rhss_deltas</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="73" style="width: 35px; color: rgba(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="73" style="width: 35px; color: rgba(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">@@ -73,14 +73,14 @@ dsGRHSs hs_ctx (GRHSs _ grhss binds) rhs_ty mb_rhss_deltas</td>

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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;">return</span> <span class="n" style="color: #333;">match_result2</span> <span class="p">}</span></span>

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

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<pre style="margin: 0;"> <span id="LC75" class="line" lang="haskell"><span class="n" style="color: #333;">dsGRHS</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;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Deltas</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LGRHS</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC76" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC76" class="line" lang="haskell">       <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC77" class="line" lang="haskell"><span class="n" style="color: #333;">dsGRHS</span> <span class="n" style="color: #333;">hs_ctx</span> <span class="n" style="color: #333;">rhs_ty</span> <span class="n" style="color: #333;">rhs_deltas</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">GRHS</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">guards</span> <span class="n" style="color: #333;">rhs</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC78" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">updPmDeltas</span> <span class="n" style="color: #333;">rhs_deltas</span> <span class="p">(</span><span class="n" style="color: #333;">matchGuards</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;">guards</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGuard</span> <span class="n" style="color: #333;">hs_ctx</span><span class="p">)</span> <span class="n" style="color: #333;">rhs</span> <span class="n" style="color: #333;">rhs_ty</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC79" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC80" 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="LC81" 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="LC82" 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="LC83" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*  matchGuard : make a MatchResult from a guarded RHS                  *</span></span>

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<pre style="margin: 0;">+<span id="LC83" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">*  matchGuard : make a MatchResult <span class="idiff left right">CoreExpr CoreExpr </span>from a guarded RHS                  *</span></span>

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<pre style="margin: 0;"> <span id="LC84" 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="LC85" 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="LC86" 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="89" style="width: 35px; color: rgba(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="89" style="width: 35px; color: rgba(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">@@ -89,7 +89,7 @@ matchGuards :: [GuardStmt GhcTc]     -- Guard</td>

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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">HsStmtContext</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span>   <span class="c1" style="color: #998; font-style: italic;">-- Context</span></span>

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<pre style="margin: 0;"> <span id="LC90" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LHsExpr</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span>         <span class="c1" style="color: #998; font-style: italic;">-- RHS</span></span>

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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>                  <span class="c1" style="color: #998; font-style: italic;">-- Type of RHS of guard</span></span>

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<pre style="margin: 0;">-<span id="LC92" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC92" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC93" class="line" lang="haskell"></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;">-- See comments with HsExpr.Stmt re what a BodyStmt means</span></span>

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<pre style="margin: 0;"> <span id="LC95" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Here we must be in a guard context (not do-expression, nor list-comp)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="130" style="width: 35px; color: rgba(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">@@ -130,7 +130,7 @@ matchGuards (BindStmt _ pat bind_rhs : stmts) ctx rhs rhs_ty = do</td>

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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell">    <span class="n" style="color: #333;">core_rhs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsLExpr</span> <span class="n" style="color: #333;">bind_rhs</span></span>

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<pre style="margin: 0;"> <span id="LC131" class="line" lang="haskell">    <span class="n" style="color: #333;">match_result'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">matchSinglePatVar</span> <span class="n" style="color: #333;">match_var</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">StmtCtxt</span> <span class="n" style="color: #333;">ctx</span><span class="p">)</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">rhs_ty</span></span>

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<pre style="margin: 0;"> <span id="LC132" class="line" lang="haskell">                                       <span class="n" style="color: #333;">match_result</span></span>

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<pre style="margin: 0;">-<span id="LC133" class="line" lang="haskell">    <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left">adjustMatchResult</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">bindNonRec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match_var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">core_rhs</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">match_result'</span></span>

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<pre style="margin: 0;">+<span id="LC133" class="line" lang="haskell">    <span class="n" style="color: #333;">pure</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;"><span class="idiff left">bindNonRec</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">match_var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">core_rhs</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right"><$></span></span> <span class="n" style="color: #333;">match_result'</span></span>

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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="n" style="color: #333;">matchGuards</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LastStmt</span>  <span class="p">{}</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</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="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"matchGuards LastStmt"</span></span>

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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell"><span class="n" style="color: #333;">matchGuards</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ParStmt</span>   <span class="p">{}</span> <span class="o" style="font-weight: 600;">:</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</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="n" style="color: #333;">panic</span> <span class="s" style="color: #d14;">"matchGuards ParStmt"</span></span>

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</li>

<li id="085703923f9c18f6ac9f926ac9a4c7c7e6d9d9ed">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#085703923f9c18f6ac9f926ac9a4c7c7e6d9d9ed"><strong>compiler/GHC/HsToCore/Match.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="174" style="width: 35px; color: rgba(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="174" style="width: 35px; color: rgba(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">@@ -174,7 +174,7 @@ type MatchId = Id   -- See Note [Match Ids]</td>

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<pre style="margin: 0;"> <span id="LC174" class="line" lang="haskell"><span class="n" style="color: #333;">match</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">MatchId</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Variables rep\'ing the exprs we\'re matching with. See Note [Match Ids]</span></span>

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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="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Type of the case expression</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="p">[</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">]</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Info about patterns, etc. (type synonym below)</span></span>

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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;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Desugared result!</span></span>

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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;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Desugared result!</span></span>

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

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<pre style="margin: 0;"> <span id="LC179" class="line" lang="haskell"><span class="n" style="color: #333;">match</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns</span></span>

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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="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</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;">eqns</span><span class="p">),</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">ty</span> <span class="p">)</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="198" style="width: 35px; color: rgba(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="198" style="width: 35px; color: rgba(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">@@ -198,20 +198,21 @@ match (v:vs) ty eqns    -- Eqns *can* be empty</td>

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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;">whenDOptM</span> <span class="kt" style="color: #458; font-weight: 600;">Opt_D_dump_view_pattern_commoning</span> <span class="p">(</span><span class="n" style="color: #333;">debug</span> <span class="n" style="color: #333;">grouped</span><span class="p">)</span></span>

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

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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;">match_results</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match_groups</span> <span class="n" style="color: #333;">grouped</span></span>

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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;">return</span> <span class="p">(</span><span class="n" style="color: #333;">adjustMatchResult</span> <span class="p">(</span><span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="o" style="font-weight: 600;">.</span><span class="p">)</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">aux_binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">-<span id="LC202" class="line" lang="haskell">                  <span class="n" style="color: #333;">foldr1</span> <span class="n" style="color: #333;">combineMatchResults</span> <span class="n" style="color: #333;">match_results</span><span class="p">)</span> <span class="p">}</span></span>

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<td class="diff-line-num new old_line" data-linenumber="203" style="width: 35px; color: rgba(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="LC201" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">foldr</span> <span class="p">(</span><span class="o" style="font-weight: 600;">.</span><span class="p">)</span> <span class="n" style="color: #333;">id</span> <span class="n" style="color: #333;">aux_binds</span> <span class="o" style="font-weight: 600;"><$></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC202" class="line" lang="haskell">            <span class="n" style="color: #333;">foldr1</span> <span class="n" style="color: #333;">combineMatchResults</span> <span class="n" style="color: #333;">match_results</span></span>

</pre>

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

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC205" class="line" lang="haskell">    <span class="n" style="color: #333;">vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vs</span></span>

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<td class="diff-line-num new_line" data-linenumber="206" style="width: 35px; color: rgba(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="LC206" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="207" style="width: 35px; color: rgba(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="LC207" class="line" lang="haskell">    <span class="n" style="color: #333;">dropGroup</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGroup</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">f</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="208" style="width: 35px; color: rgba(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="LC208" class="line" lang="haskell">    <span class="n" style="color: #333;">dropGroup</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">snd</span></span>

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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell"></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="n" style="color: #333;">match_groups</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGroup</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC210" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Result list of [MatchResult] is always non-empty</span></span>

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<pre style="margin: 0;">+<span id="LC210" class="line" lang="haskell">    <span class="n" style="color: #333;">match_groups</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGroup</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

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<pre style="margin: 0;">+<span id="LC211" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Result list of [MatchResult<span class="idiff left right"> CoreExpr</span>] is always non-empty</span></span>

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<pre style="margin: 0;"> <span id="LC212" class="line" lang="haskell">    <span class="n" style="color: #333;">match_groups</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">matchEmpty</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">ty</span></span>

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<pre style="margin: 0;"> <span id="LC213" class="line" lang="haskell">    <span class="n" style="color: #333;">match_groups</span> <span class="p">(</span><span class="n" style="color: #333;">g</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">gs</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">match_group</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">gs</span></span>

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

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<pre style="margin: 0;">-<span id="LC214" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGroup</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC215" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">PatGroup</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC216" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="n" style="color: #333;">eqns</span><span class="o" style="font-weight: 600;">@</span><span class="p">((</span><span class="n" style="color: #333;">group</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;">_</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="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">group</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;"> <span id="LC218" class="line" lang="haskell">            <span class="kt" style="color: #458; font-weight: 600;">PgCon</span> <span class="p">{}</span>  <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">matchConFamily</span>  <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">ne</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">subGroupUniq</span> <span class="p">[(</span><span class="n" style="color: #333;">c</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;">PgCon</span> <span class="n" style="color: #333;">c</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;">eqns'</span><span class="p">])</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="245" style="width: 35px; color: rgba(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">@@ -245,26 +246,26 @@ match (v:vs) ty eqns    -- Eqns *can* be empty</td>

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<pre style="margin: 0;"> <span id="LC246" class="line" lang="haskell">          <span class="n" style="color: #333;">maybeWarn</span> <span class="o" style="font-weight: 600;">$</span> <span class="p">(</span><span class="n" style="color: #333;">map</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"Putting these view expressions into the same case:"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="p">(</span><span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">g</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC247" class="line" lang="haskell">                       <span class="p">(</span><span class="n" style="color: #333;">filter</span> <span class="p">(</span><span class="n" style="color: #333;">not</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">null</span><span class="p">)</span> <span class="n" style="color: #333;">gs</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC248" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC248" class="line" lang="haskell"><span class="n" style="color: #333;">matchEmpty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC249" class="line" lang="haskell"><span class="n" style="color: #333;">matchEmpty</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

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<pre style="margin: 0;"> <span id="LC250" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See Note [Empty case expressions]</span></span>

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<pre style="margin: 0;"> <span id="LC251" class="line" lang="haskell"><span class="n" style="color: #333;">matchEmpty</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">res_ty</span></span>

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<pre style="margin: 0;">-<span id="LC251" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CanFail</span></span> <span class="n" style="color: #333;">mk_seq</span><span class="p">]</span></span>

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<pre style="margin: 0;">+<span id="LC252" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left right">R_Fallible</span></span> <span class="n" style="color: #333;">mk_seq</span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC253" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_seq</span> <span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkWildCase</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">res_ty</span></span>

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<pre style="margin: 0;"> <span id="LC255" class="line" lang="haskell">                                      <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">DEFAULT</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">fail</span><span class="p">)]</span></span>

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<pre style="margin: 0;"> <span id="LC256" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC256" class="line" lang="haskell"><span class="n" style="color: #333;">matchVariables</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell"><span class="n" style="color: #333;">matchVariables</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC258" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Real true variables, just like in matchVar, SLPJ p 94</span></span>

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<pre style="margin: 0;"> <span id="LC259" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- No binding to do: they'll all be wildcards by now (done in tidy)</span></span>

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<pre style="margin: 0;"> <span id="LC260" class="line" lang="haskell"><span class="n" style="color: #333;">matchVariables</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">match</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">shiftEqns</span> <span class="n" style="color: #333;">eqns</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC261" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC261" class="line" lang="haskell"><span class="n" style="color: #333;">matchBangs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC262" class="line" lang="haskell"><span class="n" style="color: #333;">matchBangs</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC263" class="line" lang="haskell"><span class="n" style="color: #333;">matchBangs</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns</span></span>

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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="n" style="color: #333;">match_result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match</span> <span class="p">(</span><span class="n" style="color: #333;">var</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell">            <span class="n" style="color: #333;">decomposeFirstPat</span> <span class="n" style="color: #333;">getBangPat</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">eqns</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC266" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkEvalMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

</pre>

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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="LC267" class="line" lang="haskell"><span class="n" style="color: #333;">matchCoercion</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC268" class="line" lang="haskell"><span class="n" style="color: #333;">matchCoercion</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC269" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Apply the coercion to the match variable and then match that</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC270" class="line" lang="haskell"><span class="n" style="color: #333;">matchCoercion</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">eqns</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">eqn1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC271" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">CoPat</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">co</span> <span class="n" style="color: #333;">pat</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">firstPat</span> <span class="n" style="color: #333;">eqn1</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">@@ -276,7 +277,7 @@ matchCoercion (var :| vars) ty (eqns@(eqn1 :| _))</td>

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<pre style="margin: 0;"> <span id="LC277" class="line" lang="haskell">        <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">bind</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">var'</span> <span class="p">(</span><span class="n" style="color: #333;">core_wrap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC278" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="n" style="color: #333;">bind</span> <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC279" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC279" class="line" lang="haskell"><span class="n" style="color: #333;">matchView</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC280" class="line" lang="haskell"><span class="n" style="color: #333;">matchView</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC281" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Apply the view function to the match variable and then match that</span></span>

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<pre style="margin: 0;"> <span id="LC282" class="line" lang="haskell"><span class="n" style="color: #333;">matchView</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">eqns</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">eqn1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC283" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- we could pass in the expr from the PgView,</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -294,7 +295,7 @@ matchView (var :| vars) ty (eqns@(eqn1 :| _))</td>

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<pre style="margin: 0;"> <span id="LC295" class="line" lang="haskell">                    <span class="p">(</span><span class="n" style="color: #333;">mkCoreAppDs</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"matchView"</span><span class="p">)</span> <span class="n" style="color: #333;">viewExpr'</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">))</span></span>

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<pre style="margin: 0;"> <span id="LC296" class="line" lang="haskell">                    <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC297" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC297" class="line" lang="haskell"><span class="n" style="color: #333;">matchOverloadedList</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC298" class="line" lang="haskell"><span class="n" style="color: #333;">matchOverloadedList</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">MatchId</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC299" class="line" lang="haskell"><span class="n" style="color: #333;">matchOverloadedList</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">eqns</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">eqn1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC300" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Since overloaded list patterns are treated as view patterns,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC301" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the code is roughly the same as for matchView</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="829" style="width: 35px; color: rgba(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="830" style="width: 35px; color: rgba(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">@@ -829,7 +830,7 @@ matchSimply scrut hs_ctx pat result_expr fail_expr = do</td>

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<pre style="margin: 0;"> <span id="LC830" class="line" lang="haskell">    <span class="n" style="color: #333;">extractMatchResult</span> <span class="n" style="color: #333;">match_result'</span> <span class="n" style="color: #333;">fail_expr</span></span>

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<pre style="margin: 0;"> <span id="LC831" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC832" class="line" lang="haskell"><span class="n" style="color: #333;">matchSinglePat</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</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;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LPat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span></span>

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<pre style="margin: 0;">-<span id="LC832" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC833" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</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">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="834" style="width: 35px; color: rgba(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="LC834" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- matchSinglePat ensures that the scrutinee is a variable</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC835" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- and then calls matchSinglePatVar</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="836" style="width: 35px; color: rgba(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="LC836" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="844" style="width: 35px; color: rgba(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="845" style="width: 35px; color: rgba(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">@@ -844,11 +845,12 @@ matchSinglePat (Var var) ctx pat ty match_result</td>

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<pre style="margin: 0;"> <span id="LC845" class="line" lang="haskell"><span class="n" style="color: #333;">matchSinglePat</span> <span class="n" style="color: #333;">scrut</span> <span class="n" style="color: #333;">hs_ctx</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_result</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC846" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">var</span>           <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">selectSimpleMatchVarL</span> <span class="n" style="color: #333;">pat</span></span>

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847

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<pre style="margin: 0;"> <span id="LC847" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">match_result'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">matchSinglePatVar</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">hs_ctx</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_result</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC847" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">adjustMatchResult</span> <span class="p">(</span><span class="n" style="color: #333;">bindNonRec</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">scrut</span><span class="p">)</span> <span class="n" style="color: #333;">match_result'</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC848" class="line" lang="haskell">       <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">bindNonRec</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">scrut</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">match_result'</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="849" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

849

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<pre style="margin: 0;">+<span id="LC849" class="line" lang="haskell">       <span class="p">}</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="848" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

848

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<td class="diff-line-num new_line" data-linenumber="850" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

850

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<pre style="margin: 0;"> <span id="LC850" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="849" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

849

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851

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<pre style="margin: 0;"> <span id="LC851" class="line" lang="haskell"><span class="n" style="color: #333;">matchSinglePatVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span>   <span class="c1" style="color: #998; font-style: italic;">-- See Note [Match Ids]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="850" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

850

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<td class="diff-line-num new_line" data-linenumber="852" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

852

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<pre style="margin: 0;"> <span id="LC852" class="line" lang="haskell">                  <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;">GhcRn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LPat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span></span>

</pre>

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851

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<td class="diff-line-num new_line old" data-linenumber="853" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC851" class="line" lang="haskell">                  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="853" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

853

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<pre style="margin: 0;">+<span id="LC853" class="line" lang="haskell">                  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</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">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></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="852" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

852

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854

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<pre style="margin: 0;"> <span id="LC854" class="line" lang="haskell"><span class="n" style="color: #333;">matchSinglePatVar</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ctx</span> <span class="n" style="color: #333;">pat</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_result</span></span>

</pre>

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853

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<td class="diff-line-num new_line" data-linenumber="855" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

855

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<pre style="margin: 0;"> <span id="LC855" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ASSERT2</span><span class="p">(</span> <span class="n" style="color: #333;">isInternalName</span> <span class="p">(</span><span class="n" style="color: #333;">idName</span> <span class="n" style="color: #333;">var</span><span class="p">),</span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">var</span> <span class="p">)</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="854" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

854

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<td class="diff-line-num new_line" data-linenumber="856" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

856

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<pre style="margin: 0;"> <span id="LC856" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

</pre>

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<br>

</li>

<li id="7c474b472edbb70d6316b45cccdb0c78321e94d3">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#7c474b472edbb70d6316b45cccdb0c78321e94d3"><strong>compiler/GHC/HsToCore/Match.hs-boot</strong></a>

<hr>

<table class="code white" style="font-family: monospace; font-size: 90%;" bgcolor="#fff" width="100%" cellpadding="0" cellspacing="0">

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="11" style="width: 35px; color: rgba(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="11" style="width: 35px; color: rgba(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">@@ -11,7 +11,7 @@ import GHC.Hs.Extension ( GhcRn, GhcTc )</td>

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11

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">match</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>

</pre>

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12

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<td class="diff-line-num new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

12

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

</pre>

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13

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13

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<pre style="margin: 0;"> <span id="LC13" 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;">EquationInfo</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="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">

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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15

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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">

15

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC16" class="line" lang="haskell"><span class="n" style="color: #333;">matchWrapper</span></span>

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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="kt" style="color: #458; font-weight: 600;">HsMatchContext</span> <span class="kt" style="color: #458; font-weight: 600;">GhcRn</span></span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="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="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -32,5 +32,5 @@ matchSinglePatVar</td>

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

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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">LPat</span> <span class="kt" style="color: #458; font-weight: 600;">GhcTc</span></span>

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<pre style="margin: 0;"> <span id="LC34" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;">-<span id="LC35" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC36" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span></pre>

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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span></pre>

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<br>

</li>

<li id="b370399ae1ab68e37f0e631d98a45da6df9f011c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#b370399ae1ab68e37f0e631d98a45da6df9f011c"><strong>compiler/GHC/HsToCore/Match/Constructor.hs</strong></a>

<hr>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -27,6 +27,7 @@ import GHC.Types.Basic ( Origin(..) )</td>

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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;">GHC.Tc.Utils.TcType</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;">GHC.HsToCore.Monad</span></span>

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

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC31" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Core.Make</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">mkCoreLets</span> <span class="p">)</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;">Util</span></span>

</pre>

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

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="94" style="width: 35px; color: rgba(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="95" style="width: 35px; color: rgba(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">@@ -94,7 +95,7 @@ have-we-used-all-the-constructors? question; the local function</td>

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<pre style="margin: 0;"> <span id="LC95" class="line" lang="haskell"><span class="n" style="color: #333;">matchConFamily</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>

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<pre style="margin: 0;"> <span id="LC96" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC97" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC97" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC98" class="line" lang="haskell">               <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC99" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Each group of eqns is for a single constructor</span></span>

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<pre style="margin: 0;"> <span id="LC100" class="line" lang="haskell"><span class="n" style="color: #333;">matchConFamily</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">groups</span></span>

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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="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">alts</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">toRealAlt</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">matchOneConLike</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span><span class="p">)</span> <span class="n" style="color: #333;">groups</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -107,7 +108,7 @@ matchConFamily (var :| vars) ty groups</td>

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<pre style="margin: 0;"> <span id="LC108" class="line" lang="haskell"><span class="n" style="color: #333;">matchPatSyn</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>

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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span></span>

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<pre style="margin: 0;"> <span id="LC110" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span></span>

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<pre style="margin: 0;">-<span id="LC110" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC111" class="line" lang="haskell">            <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</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="n" style="color: #333;">matchPatSyn</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns</span></span>

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<td class="diff-line-num new_line" data-linenumber="113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">alt</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">toSynAlt</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">matchOneConLike</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns</span></span>

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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell">       <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoSynCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span><span class="p">)</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -134,14 +135,15 @@ matchOneConLike vars ty (eqn1 :| eqns)   -- All eqns for a single constructor</td>

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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- and returns the types of the *value* args, which is what we want</span></span>

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<pre style="margin: 0;"> <span id="LC136" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC137" class="line" lang="haskell">              <span class="n" style="color: #333;">match_group</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>

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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="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">ConArgPats</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC138" 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;">ConArgPats</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- All members of the group have compatible ConArgPats</span></span>

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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell">              <span class="n" style="color: #333;">match_group</span> <span class="n" style="color: #333;">arg_vars</span> <span class="n" style="color: #333;">arg_eqn_prs</span></span>

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

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<pre style="margin: 0;"> <span id="LC142" class="line" lang="haskell">                  <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="p">(</span><span class="n" style="color: #333;">wraps</span><span class="p">,</span> <span class="n" style="color: #333;">eqns'</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">liftM</span> <span class="n" style="color: #333;">unzip</span> <span class="p">(</span><span class="n" style="color: #333;">mapM</span> <span class="n" style="color: #333;">shift</span> <span class="n" style="color: #333;">arg_eqn_prs</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC143" class="line" lang="haskell">                     <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">group_arg_vars</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">select_arg_vars</span> <span class="n" style="color: #333;">arg_vars</span> <span class="n" style="color: #333;">arg_eqn_prs</span></span>

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<pre style="margin: 0;"> <span id="LC144" class="line" lang="haskell">                     <span class="p">;</span> <span class="n" style="color: #333;">match_result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match</span> <span class="p">(</span><span class="n" style="color: #333;">group_arg_vars</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns'</span></span>

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<pre style="margin: 0;">-<span id="LC144" class="line" lang="haskell">                     <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">adjustMatchResult</span> <span class="p">(</span><span class="n" style="color: #333;">foldr1</span> <span class="p">(</span><span class="o" style="font-weight: 600;">.</span><span class="p">)</span> <span class="n" style="color: #333;">wraps</span><span class="p">)</span> <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;">+<span id="LC145" class="line" lang="haskell">                     <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">foldr1</span> <span class="p">(</span><span class="o" style="font-weight: 600;">.</span><span class="p">)</span> <span class="n" style="color: #333;">wraps</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">match_result</span></span>

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<pre style="margin: 0;">+<span id="LC146" class="line" lang="haskell">                     <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC147" 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;">shift</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">eqn</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EqnInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">eqn_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ConPatOut</span><span class="p">{</span> <span class="n" style="color: #333;">pat_tvs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tvs</span><span class="p">,</span> <span class="n" style="color: #333;">pat_dicts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ds</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="149" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell">                                                             <span class="n" style="color: #333;">pat_binds</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">bind</span><span class="p">,</span> <span class="n" style="color: #333;">pat_args</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">args</span></span>

</pre>

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<br>

</li>

<li id="f017e4c978a9ff341ce5a7b838787fd2a4758b59">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#f017e4c978a9ff341ce5a7b838787fd2a4758b59"><strong>compiler/GHC/HsToCore/Match/Literal.hs</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="407" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -407,7 +407,7 @@ tidyNPat over_lit mb_neg eq outer_ty</td>

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407

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<pre style="margin: 0;"> <span id="LC407" class="line" lang="haskell"><span class="n" style="color: #333;">matchLiterals</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span></span>

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408

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408

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<pre style="margin: 0;"> <span id="LC408" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Type of the whole case expression</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC409" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ All PgLits</span></span>

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<pre style="margin: 0;">-<span id="LC410" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC410" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC411" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC412" class="line" lang="haskell"><span class="n" style="color: #333;">matchLiterals</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">sub_groups</span></span>

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<pre style="margin: 0;"> <span id="LC413" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span>       <span class="c1" style="color: #998; font-style: italic;">-- Deal with each group</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="424" style="width: 35px; color: rgba(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="424" style="width: 35px; color: rgba(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">@@ -424,7 +424,7 @@ matchLiterals (var :| vars) ty sub_groups</td>

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<pre style="margin: 0;"> <span id="LC424" class="line" lang="haskell">            <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoPrimCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span></span>

</pre>

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

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<td class="diff-line-num new_line" data-linenumber="426" style="width: 35px; color: rgba(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="LC426" 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_line old" data-linenumber="427" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC427" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Literal</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC427" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Literal</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC428" class="line" lang="haskell">    <span class="n" style="color: #333;">match_group</span> <span class="n" style="color: #333;">eqns</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">firstEqn</span> <span class="o" style="font-weight: 600;">:|</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>

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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="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dflags</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">getDynFlags</span></span>

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<pre style="margin: 0;"> <span id="LC430" class="line" lang="haskell">             <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="n" style="color: #333;">platform</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">targetPlatform</span> <span class="n" style="color: #333;">dflags</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -432,7 +432,7 @@ matchLiterals (var :| vars) ty sub_groups</td>

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<pre style="margin: 0;"> <span id="LC432" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">match_result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">shiftEqns</span> <span class="n" style="color: #333;">eqns</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC433" class="line" lang="haskell">             <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">hsLitKey</span> <span class="n" style="color: #333;">platform</span> <span class="n" style="color: #333;">hs_lit</span><span class="p">,</span> <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC434" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC435" class="line" lang="haskell">    <span class="n" style="color: #333;">wrap_str_guard</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Literal</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="p"><span class="idiff left">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC435" class="line" lang="haskell">    <span class="n" style="color: #333;">wrap_str_guard</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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Literal</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DsM</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">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC436" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Equality check for string literals</span></span>

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<pre style="margin: 0;"> <span id="LC437" class="line" lang="haskell">    <span class="n" style="color: #333;">wrap_str_guard</span> <span class="n" style="color: #333;">eq_str</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LitString</span> <span class="n" style="color: #333;">s</span><span class="p">,</span> <span class="n" style="color: #333;">mr</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC438" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">-- We now have to convert back to FastString. Perhaps there</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="473" style="width: 35px; color: rgba(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="473" style="width: 35px; color: rgba(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">@@ -473,7 +473,7 @@ hsLitKey _        l                  = pprPanic "hsLitKey" (ppr l)</td>

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<pre style="margin: 0;"> <span id="LC473" 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="LC474" 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="LC475" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC476" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPats</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC476" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPats</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC477" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPats</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">eqn1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">eqns</span><span class="p">)</span>    <span class="c1" style="color: #998; font-style: italic;">-- All for the same literal</span></span>

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<pre style="margin: 0;"> <span id="LC478" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">NPat</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span> <span class="n" style="color: #333;">mb_neg</span> <span class="n" style="color: #333;">eq_chk</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">firstPat</span> <span class="n" style="color: #333;">eqn1</span></span>

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<pre style="margin: 0;"> <span id="LC479" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">lit_expr</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsOverLit</span> <span class="n" style="color: #333;">lit</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -502,7 +502,7 @@ We generate:</td>

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<pre style="margin: 0;"> <span id="LC502" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">\end{verbatim}</span></span>

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<pre style="margin: 0;"> <span id="LC503" 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="LC504" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC505" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPlusKPats</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left right">MatchResult</span></span></span>

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<pre style="margin: 0;">+<span id="LC505" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPlusKPats</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CoreExpr</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- All NPlusKPats, for the *same* literal k</span></span>

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<pre style="margin: 0;"> <span id="LC507" class="line" lang="haskell"><span class="n" style="color: #333;">matchNPlusKPats</span> <span class="p">(</span><span class="n" style="color: #333;">var</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">vars</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">eqn1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="n" style="color: #333;">eqns</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC508" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span>  <span class="p">{</span> <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">NPlusKPat</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">n1</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">lit1</span><span class="p">)</span> <span class="n" style="color: #333;">lit2</span> <span class="n" style="color: #333;">ge</span> <span class="n" style="color: #333;">minus</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -515,7 +515,7 @@ matchNPlusKPats (var :| vars) ty (eqn1 :| eqns)</td>

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<pre style="margin: 0;"> <span id="LC515" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">match_result</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match</span> <span class="n" style="color: #333;">vars</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">eqns'</span></span>

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<pre style="margin: 0;"> <span id="LC516" class="line" lang="haskell">        <span class="p">;</span> <span class="n" style="color: #333;">return</span>  <span class="p">(</span><span class="n" style="color: #333;">mkGuardedMatchResult</span> <span class="n" style="color: #333;">pred_expr</span>               <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC517" class="line" lang="haskell">                   <span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">n1</span> <span class="n" style="color: #333;">minusk_expr</span><span class="p">)</span>   <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">-<span id="LC518" class="line" lang="haskell">                   <span class="n" style="color: #333;"><span class="idiff left">adjustMatchResult</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">foldr1</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">wraps</span></span><span class="p"><span class="idiff right">)</span></span>         <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC518" class="line" lang="haskell">                   <span class="n" style="color: #333;"><span class="idiff left">fmap</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">foldr1</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">wraps</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff right">             </span>         <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC519" class="line" lang="haskell">                   <span class="n" style="color: #333;">match_result</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC520" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC521" class="line" lang="haskell">    <span class="n" style="color: #333;">shift</span> <span class="n" style="color: #333;">n1</span> <span class="n" style="color: #333;">eqn</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">EqnInfo</span> <span class="p">{</span> <span class="n" style="color: #333;">eqn_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">NPlusKPat</span> <span class="kr" style="font-weight: 600;">_</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">L</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</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="n" style="color: #333;">pats</span> <span class="p">})</span></span>

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<br>

</li>

<li id="c8a27621f82549165d8946ae8e9f467660958059">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#c8a27621f82549165d8946ae8e9f467660958059"><strong>compiler/GHC/HsToCore/Monad.hs</strong></a>

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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Monadery used in desugaring</span></span>

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<pre style="margin: 0;"> <span id="LC7" 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="LC8" class="line" lang="haskell"></span>

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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 FlexibleInstances, FlexibleContexts #-}</span></span>

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<pre style="margin: 0;">-<span id="LC10" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -fno-warn-orphans #-}</span>  <span class="c1" style="color: #998; font-style: italic;">-- instance MonadThings is necessarily an orphan</span></span>

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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 DeriveFunctor #-}</span></span>

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FlexibleContexts #-}</span></span>

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FlexibleInstances #-}</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE LambdaCase #-}</span></span>

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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ViewPatterns #-}</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"></span>

</pre>

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<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">

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# OPTIONS_GHC -fno-warn-orphans #-}</span>  <span class="c1" style="color: #998; font-style: italic;">-- instance MonadThings is necessarily an orphan</span></span>

</pre>

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

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<pre style="margin: 0;"> <span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.HsToCore.Monad</span> <span class="p">(</span></span>

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<pre style="margin: 0;"> <span id="LC18" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">DsM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapM</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mapAndUnzipM</span><span class="p">,</span></span>

</pre>

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

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="42" style="width: 35px; color: rgba(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="46" style="width: 35px; color: rgba(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">@@ -42,8 +46,7 @@ module GHC.HsToCore.Monad (</td>

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

</pre>

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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Data types</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">DsMatchContext</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC45" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</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;">MatchResult</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;">DsWrapper</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">idDsWrapper</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="49" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC46" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">orFail</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="49" style="width: 35px; color: rgba(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="LC49" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</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;">MatchResult</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span> <span class="nf" style="color: #900; font-weight: 600;">runMatchResult</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">DsWrapper</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">idDsWrapper</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="47" style="width: 35px; color: rgba(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="50" style="width: 35px; color: rgba(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="LC50" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num 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">

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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell">        <span class="c1" style="color: #998; font-style: italic;">-- Levity polymorphism</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="49" style="width: 35px; color: rgba(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="LC52" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">dsNoLevPoly</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">dsNoLevPolyExpr</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">dsWhenNoErrs</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="122" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -119,7 +122,7 @@ data EquationInfo</td>

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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- @W# -1## :: Word@, but we shouldn't warn about an overflowed</span></span>

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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- literal for /both/ of these cases.</span></span>

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

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<pre style="margin: 0;">-<span id="LC122" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">eqn_rhs</span>  <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">+<span id="LC125" class="line" lang="haskell">            <span class="p">,</span> <span class="n" style="color: #333;">eqn_rhs</span>  <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell">              <span class="c1" style="color: #998; font-style: italic;">-- ^ What to do after match</span></span>

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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell">            <span class="p">}</span></span>

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

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="130" style="width: 35px; color: rgba(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="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="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -130,25 +133,38 @@ type DsWrapper = CoreExpr -> CoreExpr</td>

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<td class="diff-line-num old_line" data-linenumber="130" style="width: 35px; color: rgba(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="LC133" class="line" lang="haskell"><span class="n" style="color: #333;">idDsWrapper</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DsWrapper</span></span>

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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell"><span class="n" style="color: #333;">idDsWrapper</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span></span>

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

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<pre style="margin: 0;">-<span id="LC133" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The semantics of (match vs (EqnInfo wrap pats rhs)) is the MatchResult</span></span>

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<pre style="margin: 0;">+<span id="LC136" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- The semantics of (match vs (EqnInfo wrap pats rhs)) is the MatchResult<span class="idiff left right"> CoreExpr</span></span></span>

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<pre style="margin: 0;"> <span id="LC137" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--      \fail. wrap (case vs of { pats -> rhs fail })</span></span>

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<pre style="margin: 0;"> <span id="LC138" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where vs are not bound by wrap</span></span>

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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_line old" data-linenumber="140" style="width: 35px; color: rgba(0,0,0,0.3); 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>

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<pre style="margin: 0;">-<span id="LC138" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- A MatchResult is an expression with a hole in it</span></span>

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<pre style="margin: 0;">-<span id="LC139" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC140" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC141" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span>       <span class="c1" style="color: #998; font-style: italic;">-- Tells whether the failure expression is used</span></span>

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<pre style="margin: 0;">-<span id="LC142" class="line" lang="haskell">        <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC143" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- Takes a expression to plug in at the</span></span>

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<pre style="margin: 0;">-<span id="LC144" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- failure point(s). The expression should</span></span>

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<pre style="margin: 0;">-<span id="LC145" class="line" lang="haskell">                        <span class="c1" style="color: #998; font-style: italic;">-- be duplicatable!</span></span>

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<pre style="margin: 0;">-<span id="LC146" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC147" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CanFail</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span></span>

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<pre style="margin: 0;">-<span id="LC148" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC149" class="line" lang="haskell"><span class="n" style="color: #333;">orFail</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span></span>

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<pre style="margin: 0;">-<span id="LC150" class="line" lang="haskell"><span class="n" style="color: #333;">orFail</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span></span>

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<pre style="margin: 0;">-<span id="LC151" class="line" lang="haskell"><span class="n" style="color: #333;">orFail</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;">CanFail</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC140" class="line" lang="haskell"><span class="cd">-- | This is a value of type a with potentially a CoreExpr-shaped hole in it.</span></span>

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<pre style="margin: 0;">+<span id="LC141" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is used to deal with cases where we are potentially handling pattern</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC142" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- match failure, and want to later specify how failure is handled.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC143" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC144" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- | We represent the case where there is no hole without a function from</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC145" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- 'CoreExpr', like this, because sometimes we have nothing to put in the</span></span>

</pre>

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146

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<pre style="margin: 0;">+<span id="LC146" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- hole and so want to be sure there is in fact no hole.</span></span>

</pre>

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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="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DsM</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="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="kt" style="color: #458; font-weight: 600;">MR_Fallible</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</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="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">

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<pre style="margin: 0;">+<span id="LC149" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">deriving</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Functor</span><span class="p">)</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">+<span id="LC151" class="line" lang="haskell"><span class="cd">-- | Product is an "or" on falliblity---the combined match result is infallible</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- only if the left and right argument match results both were.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC153" 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="LC154" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- This is useful for combining a bunch of alternatives together and then</span></span>

</pre>

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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="c1" style="color: #998; font-style: italic;">-- getting the overall falliblity of the entire group. See 'mkDataConCase' for</span></span>

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<pre style="margin: 0;">+<span id="LC156" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- an example.</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC157" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Applicative</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC158" class="line" lang="haskell">  <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="p">(</span><span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">v</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC159" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;"><*></span> <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;"><*></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="LC160" class="line" lang="haskell">  <span class="n" style="color: #333;">f</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="kt" style="color: #458; font-weight: 600;">MR_Fallible</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;">fail</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">runMatchResult</span> <span class="n" style="color: #333;">fail</span> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;"><*></span> <span class="n" style="color: #333;">runMatchResult</span> <span class="n" style="color: #333;">fail</span> <span class="n" style="color: #333;">x</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">+<span id="LC162" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Given a fail expression to use, and a MatchResult CoreExpr, compute the filled CoreExpr whether</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC163" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- the MatchResult CoreExpr was failable or not.</span></span>

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<pre style="margin: 0;">+<span id="LC164" class="line" lang="haskell"><span class="n" style="color: #333;">runMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</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;">DsM</span> <span class="n" style="color: #333;">a</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC165" class="line" lang="haskell"><span class="n" style="color: #333;">runMatchResult</span> <span class="n" style="color: #333;">fail</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;">case</span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">+<span id="LC167" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</span> <span class="n" style="color: #333;">body_fn</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span></span>

</pre>

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

</pre>

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<td class="diff-line-num old_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC169" 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="LC170" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">************************************************************************</span></span>

</pre>

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<br>

</li>

<li id="94864be2e2eb1959a038d5d903a6c784e5cfb32a">

<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4...401f7bb312aa6c570287d313f8b587aaebca72b2#94864be2e2eb1959a038d5d903a6c784e5cfb32a"><strong>compiler/GHC/HsToCore/Utils.hs</strong></a>

<hr>

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

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

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -10,6 +10,7 @@ This module exports some utility functions of no great interest.</td>

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

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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>

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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE FlexibleContexts #-}</span></span>

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE LambdaCase #-}</span></span>

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<pre style="margin: 0;"> <span id="LC14" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE TypeFamilies #-}</span></span>

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<pre style="margin: 0;"> <span id="LC15" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE ViewPatterns #-}</span></span>

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

</pre>

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

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

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -18,10 +19,11 @@ module GHC.HsToCore.Utils (</td>

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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">EquationInfo</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

</pre>

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<td class="diff-line-num new_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="nf" style="color: #900; font-weight: 600;">firstPat</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">shiftEqns</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line old" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC21" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="p"><span class="idiff left">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff">),</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CanItFail</span></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;">CaseAlt</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="22" style="width: 35px; color: rgba(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="LC22" class="line" lang="haskell">        <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left right"> </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;">CaseAlt</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">),</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">

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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="nf" style="color: #900; font-weight: 600;">cantFailMatchResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">alwaysFailMatchResult</span><span class="p">,</span></span>

</pre>

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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="LC24" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">extractMatchResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">combineMatchResults</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC24" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">adjustMatchResult</span><span class="p">,</span>  <span class="nf" style="color: #900; font-weight: 600;">adjustMatchResultDs</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">adjustMatchResultDs</span><span class="p">,</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="25" style="width: 35px; color: rgba(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="LC26" class="line" lang="haskell">        <span class="nf" style="color: #900; font-weight: 600;">shareFailureHandler</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;">mkCoLetMatchResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkViewMatchResult</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkGuardedMatchResult</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;">matchCanFail</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">mkEvalMatchResult</span><span class="p">,</span></span>

</pre>

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

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="85" style="width: 35px; color: rgba(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="87" style="width: 35px; color: rgba(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">@@ -85,6 +87,7 @@ import GHC.Tc.Types.Evidence</td>

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

</pre>

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<pre style="margin: 0;"> <span id="LC88" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span>    <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">zipWithM</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC89" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List.NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC90" 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;">maybeToList</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC91" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.List.NonEmpty</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">NEL</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="92" style="width: 35px; color: rgba(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="LC92" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC93" 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">@@ -192,48 +195,42 @@ shiftEqns :: Functor f => f EquationInfo -> f EquationInfo</td>

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<pre style="margin: 0;"> <span id="LC195" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Drop the first pattern in each equation</span></span>

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<pre style="margin: 0;"> <span id="LC196" class="line" lang="haskell"><span class="n" style="color: #333;">shiftEqns</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</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;">eqn</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">eqn</span> <span class="p">{</span> <span class="n" style="color: #333;">eqn_pats</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tail</span> <span class="p">(</span><span class="n" style="color: #333;">eqn_pats</span> <span class="n" style="color: #333;">eqn</span><span class="p">)</span> <span class="p">}</span></span>

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<pre style="margin: 0;"> <span id="LC197" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC195" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Functions on MatchResults</span></span>

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<pre style="margin: 0;">+<span id="LC198" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Functions on MatchResult<span class="idiff left right"> CoreExpr</span>s</span></span>

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

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<pre style="margin: 0;">-<span id="LC197" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</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="LC198" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CanFail</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></span><span class="p">)</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="LC199" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CantFail</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">_</span></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="LC200" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;"><span class="idiff left">a</span></span><span class="idiff right"> </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="LC201" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">R_Fallible</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{}</span>)</span>  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">True</span></span>

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<pre style="margin: 0;">+<span id="LC202" class="line" lang="haskell"><span class="n" style="color: #333;">matchCanFail</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">R_Infallible</span></span><span class="idiff"> </span><span class="p"><span class="idiff right">{}</span>)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>

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

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

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<pre style="margin: 0;">-<span id="LC202" class="line" lang="haskell"><span class="n" style="color: #333;">alwaysFailMatchResult</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CanFail</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">fail</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">return</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;">+<span id="LC204" class="line" lang="haskell"><span class="n" style="color: #333;">alwaysFailMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC205" class="line" lang="haskell"><span class="n" style="color: #333;">alwaysFailMatchResult</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">R_Fallible</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">fail</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">return</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail</span></span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">-<span id="LC204" class="line" lang="haskell"><span class="n" style="color: #333;">cantFailMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC205" class="line" lang="haskell"><span class="n" style="color: #333;">cantFailMatchResult</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;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CantFail</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">return</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">expr</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC207" class="line" lang="haskell"><span class="n" style="color: #333;">cantFailMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC208" class="line" lang="haskell"><span class="n" style="color: #333;">cantFailMatchResult</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;">M<span class="idiff left">R_Infallible</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">return</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">expr</span></span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC209" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC207" class="line" lang="haskell"><span class="n" style="color: #333;">extractMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC208" class="line" lang="haskell"><span class="n" style="color: #333;">extractMatchResult</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span> <span class="n" style="color: #333;">match_fn</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC209" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">match_fn</span> <span class="p">(</span><span class="n" style="color: #333;">error</span> <span class="s" style="color: #d14;">"It can't fail!"</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC210" class="line" lang="haskell"><span class="n" style="color: #333;">extractMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC211" class="line" lang="haskell"><span class="n" style="color: #333;">extractMatchResult</span> <span class="n" style="color: #333;">match_result</span> <span class="n" style="color: #333;">failure_expr</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC212" class="line" lang="haskell">  <span class="n" style="color: #333;">runMatchResult</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC213" class="line" lang="haskell">    <span class="n" style="color: #333;">failure_expr</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC214" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">shareFailureHandler</span> <span class="n" style="color: #333;">match_result</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC215" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC211" class="line" lang="haskell"><span class="n" style="color: #333;">extractMatchResult</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CanFail</span> <span class="n" style="color: #333;">match_fn</span><span class="p">)</span> <span class="n" style="color: #333;">fail_expr</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="LC212" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">fail_bind</span><span class="p">,</span> <span class="n" style="color: #333;">if_it_fails</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkFailurePair</span> <span class="n" style="color: #333;">fail_expr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC213" class="line" lang="haskell">    <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match_fn</span> <span class="n" style="color: #333;">if_it_fails</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC214" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoreLet</span> <span class="n" style="color: #333;">fail_bind</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC215" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC216" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC217" class="line" lang="haskell"><span class="n" style="color: #333;">combineMatchResults</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC218" class="line" lang="haskell"><span class="n" style="color: #333;">combineMatchResults</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CanFail</span>      <span class="n" style="color: #333;">body_fn1</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC219" class="line" lang="haskell">                    <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail2</span> <span class="n" style="color: #333;">body_fn2</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC220" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail2</span> <span class="n" style="color: #333;">body_fn</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC221" 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="LC222" class="line" lang="haskell">    <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">body2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">body_fn2</span> <span class="n" style="color: #333;">fail</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC223" class="line" lang="haskell">                      <span class="p">(</span><span class="n" style="color: #333;">fail_bind</span><span class="p">,</span> <span class="n" style="color: #333;">duplicatable_expr</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkFailurePair</span> <span class="n" style="color: #333;">body2</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC224" class="line" lang="haskell">                      <span class="n" style="color: #333;">body1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">body_fn1</span> <span class="n" style="color: #333;">duplicatable_expr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC225" class="line" lang="haskell">                      <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">fail_bind</span> <span class="n" style="color: #333;">body1</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC226" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC227" class="line" lang="haskell"><span class="n" style="color: #333;">combineMatchResults</span> <span class="n" style="color: #333;">match_result1</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</span></span>

</pre>

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

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<pre style="margin: 0;">+<span id="LC217" class="line" lang="haskell"><span class="n" style="color: #333;">combineMatchResults</span> <span class="n" style="color: #333;">match_result1</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">_</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;">match_result1</span></span>

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

</pre>

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<pre style="margin: 0;">-<span id="LC230" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">DsWrapper</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC231" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResult</span> <span class="n" style="color: #333;">encl_fn</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail</span> <span class="n" style="color: #333;">body_fn</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC232" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">encl_fn</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span></span>

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<pre style="margin: 0;">-<span id="LC233" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC234" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResultDs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC235" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResultDs</span> <span class="n" style="color: #333;">encl_fn</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail</span> <span class="n" style="color: #333;">body_fn</span><span class="p">)</span></span>

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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="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">encl_fn</span> <span class="o" style="font-weight: 600;">=<<</span> <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC219" class="line" lang="haskell"><span class="n" style="color: #333;">combineMatchResults</span> <span class="n" style="color: #333;">match_result1</span> <span class="n" style="color: #333;">match_result2</span> <span class="o" style="font-weight: 600;">=</span></span>

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<pre style="margin: 0;">+<span id="LC220" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- if the first pattern needs a failure handler (i.e. if it is is fallible),</span></span>

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<pre style="margin: 0;">+<span id="LC221" class="line" lang="haskell">  <span class="c1" style="color: #998; font-style: italic;">-- make it let-bind it bind it with `shareFailureHandler`.</span></span>

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<pre style="margin: 0;">+<span id="LC222" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">shareFailureHandler</span> <span class="n" style="color: #333;">match_result1</span> <span class="kr" style="font-weight: 600;">of</span></span>

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<pre style="margin: 0;">+<span id="LC223" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">match_result1</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC224" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</span> <span class="n" style="color: #333;">body_fn1</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</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;">fail_expr</span> <span class="o" style="font-weight: 600;">-></span></span>

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<pre style="margin: 0;">+<span id="LC225" class="line" lang="haskell">      <span class="c1" style="color: #998; font-style: italic;">-- Before actually failing, try the next match arm.</span></span>

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<pre style="margin: 0;">+<span id="LC226" class="line" lang="haskell">      <span class="n" style="color: #333;">body_fn1</span> <span class="o" style="font-weight: 600;">=<<</span> <span class="n" style="color: #333;">runMatchResult</span> <span class="n" style="color: #333;">fail_expr</span> <span class="n" style="color: #333;">match_result2</span></span>

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<pre style="margin: 0;">+<span id="LC227" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC228" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResultDs</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="kt" style="color: #458; font-weight: 600;">DsM</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;">MatchResult</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;">MatchResult</span> <span class="n" style="color: #333;">b</span></span>

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<pre style="margin: 0;">+<span id="LC229" class="line" lang="haskell"><span class="n" style="color: #333;">adjustMatchResultDs</span> <span class="n" style="color: #333;">encl_fn</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;">case</span></span>

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<pre style="margin: 0;">+<span id="LC230" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="n" style="color: #333;">body_fn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;">+<span id="LC231" class="line" lang="haskell">    <span class="n" style="color: #333;">encl_fn</span> <span class="o" style="font-weight: 600;">=<<</span> <span class="n" style="color: #333;">body_fn</span></span>

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<pre style="margin: 0;">+<span id="LC232" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</span> <span class="n" style="color: #333;">body_fn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</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;">fail</span> <span class="o" style="font-weight: 600;">-></span></span>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="haskell">    <span class="n" style="color: #333;">encl_fn</span> <span class="o" style="font-weight: 600;">=<<</span> <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span></span>

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

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<pre style="margin: 0;"> <span id="LC235" class="line" lang="haskell"><span class="n" style="color: #333;">wrapBinds</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Var</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;"> <span id="LC236" class="line" lang="haskell"><span class="n" style="color: #333;">wrapBinds</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">e</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">e</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -247,51 +244,50 @@ wrapBind new old body   -- NB: this function must deal with term</td>

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<pre style="margin: 0;"> <span id="LC244" class="line" lang="haskell"><span class="n" style="color: #333;">seqVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;"> <span id="LC245" class="line" lang="haskell"><span class="n" style="color: #333;">seqVar</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkDefaultCase</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">body</span></span>

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

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<pre style="margin: 0;">-<span id="LC250" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreBind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

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<pre style="margin: 0;">-<span id="LC251" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="n" style="color: #333;">bind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">adjustMatchResult</span></span> <span class="p">(</span><span class="n" style="color: #333;">mkCoreLet</span> <span class="n" style="color: #333;">bind</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC247" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreBind</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

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<pre style="margin: 0;">+<span id="LC248" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoLetMatchResult</span> <span class="n" style="color: #333;">bind</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left right">fmap</span></span> <span class="p">(</span><span class="n" style="color: #333;">mkCoreLet</span> <span class="n" style="color: #333;">bind</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC249" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC250" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (mkViewMatchResult var' viewExpr mr) makes the expression</span></span>

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<pre style="margin: 0;"> <span id="LC251" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- let var' = viewExpr in mr</span></span>

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<pre style="margin: 0;">-<span id="LC255" class="line" lang="haskell"><span class="n" style="color: #333;">mkViewMatchResult</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;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC256" class="line" lang="haskell"><span class="n" style="color: #333;">mkViewMatchResult</span> <span class="n" style="color: #333;">var'</span> <span class="n" style="color: #333;">viewExpr</span> <span class="o" style="font-weight: 600;">=</span></span>

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<pre style="margin: 0;">-<span id="LC257" class="line" lang="haskell">    <span class="n" style="color: #333;">adjustMatchResult</span> <span class="p">(</span><span class="n" style="color: #333;">mkCoreLet</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">var'</span> <span class="n" style="color: #333;">viewExpr</span><span class="p">))</span></span>

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<pre style="margin: 0;">+<span id="LC252" class="line" lang="haskell"><span class="n" style="color: #333;">mkViewMatchResult</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;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;">+<span id="LC253" class="line" lang="haskell"><span class="n" style="color: #333;">mkViewMatchResult</span> <span class="n" style="color: #333;">var'</span> <span class="n" style="color: #333;">viewExpr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkCoreLet</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NonRec</span> <span class="n" style="color: #333;">var'</span> <span class="n" style="color: #333;">viewExpr</span></span>

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<pre style="margin: 0;"> <span id="LC254" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC259" class="line" lang="haskell"><span class="n" style="color: #333;">mkEvalMatchResult</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

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<pre style="margin: 0;">-<span id="LC260" class="line" lang="haskell"><span class="n" style="color: #333;">mkEvalMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</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 class="idiff left">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">adjustMatchResult</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Case</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">Var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</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">DEFAULT</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">[]</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="p"><span class="idiff right">)])</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC255" class="line" lang="haskell"><span class="n" style="color: #333;">mkEvalMatchResult</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC256" class="line" lang="haskell"><span class="n" style="color: #333;">mkEvalMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fmap</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC257" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">Case</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">Var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">var</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">ty</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">DEFAULT</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">[]</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">e</span></span><span class="p"><span class="idiff right">)]</span></span></span>

</pre>

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

</pre>

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<pre style="margin: 0;">-<span id="LC263" class="line" lang="haskell"><span class="n" style="color: #333;">mkGuardedMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="o" style="font-weight: 600;"><span class="idiff left">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">MatchResult</span></span></span>

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<pre style="margin: 0;">-<span id="LC264" class="line" lang="haskell"><span class="n" style="color: #333;">mkGuardedMatchResult</span> <span class="n" style="color: #333;">pred_expr</span> <span class="p"><span class="idiff left">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body_fn</span></span><span class="p"><span class="idiff right">)</span></span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC265" class="line" lang="haskell">  <span class="o" style="font-weight: 600;"><span class="idiff left">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CanFail</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">do</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body</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">body_fn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail</span></span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC266" class="line" lang="haskell">  <span class="idiff left">                                   </span><span class="n" style="color: #333;"><span class="idiff">return</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkIfThenElse</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pred_expr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="p"><span class="idiff right">)</span>)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC259" class="line" lang="haskell"><span class="n" style="color: #333;">mkGuardedMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MatchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC260" class="line" lang="haskell"><span class="n" style="color: #333;">mkGuardedMatchResult</span> <span class="n" style="color: #333;">pred_expr</span> <span class="n" style="color: #333;"><span class="idiff left">mr</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">MR_Fallible</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff right">do</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC261" class="line" lang="haskell">  <span class="n" style="color: #333;"><span class="idiff left">body</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">runMatchResult</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mr</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC262" class="line" lang="haskell">  <span class="n" style="color: #333;"><span class="idiff left">return</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">mkIfThenElse</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">pred_expr</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">body</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail</span></span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC263" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC264" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoPrimCaseMatchResult</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span>                  <span class="c1" style="color: #998; font-style: italic;">-- Scrutinee</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC265" class="line" lang="haskell">                        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span>                      <span class="c1" style="color: #998; font-style: italic;">-- Type of the case</span></span>

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<pre style="margin: 0;">-<span id="LC270" 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;">Literal</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="p">)]</span>  <span class="c1" style="color: #998; font-style: italic;">-- Alternatives</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC271" class="line" lang="haskell">                        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span>               <span class="c1" style="color: #998; font-style: italic;">-- Literals are all unlifted</span></span>

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<td class="diff-line-num new old_line" data-linenumber="272" style="width: 35px; color: rgba(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="o" style="font-weight: 600;">-></span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Literal</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span><span class="p">)]</span>  <span class="c1" style="color: #998; font-style: italic;">-- Alternatives</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC267" class="line" lang="haskell">                        <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff right"> </span>              <span class="c1" style="color: #998; font-style: italic;">-- Literals are all unlifted</span></span>

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<pre style="margin: 0;"> <span id="LC268" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoPrimCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_alts</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC273" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CanFail</span></span> <span class="n" style="color: #333;">mk_case</span></span>

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<pre style="margin: 0;">+<span id="LC269" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left right">R_Fallible</span></span> <span class="n" style="color: #333;">mk_case</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC270" 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="LC271" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_case</span> <span class="n" style="color: #333;">fail</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="LC272" class="line" lang="haskell">        <span class="n" style="color: #333;">alts</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span> <span class="n" style="color: #333;">sorted_alts</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC273" class="line" lang="haskell">        <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Case</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="p">((</span><span class="kt" style="color: #458; font-weight: 600;">DEFAULT</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span> <span class="o" style="font-weight: 600;">:</span> <span class="n" style="color: #333;">alts</span><span class="p">))</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC274" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC275" class="line" lang="haskell">    <span class="n" style="color: #333;">sorted_alts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">sortWith</span> <span class="n" style="color: #333;">fst</span> <span class="n" style="color: #333;">match_alts</span>       <span class="c1" style="color: #998; font-style: italic;">-- Right order for a Case</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC280" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">fail</span> <span class="p">(</span><span class="n" style="color: #333;">lit</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">MatchResult</span></span><span class="idiff"> </span><span class="kr" style="font-weight: 600;"><span class="idiff">_</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">body_fn</span></span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC276" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">fail</span> <span class="p">(</span><span class="n" style="color: #333;">lit</span><span class="p">,</span> <span class="n" style="color: #333;"><span class="idiff left right">mr</span></span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC277" 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;">not</span> <span class="p">(</span><span class="n" style="color: #333;">litIsLifted</span> <span class="n" style="color: #333;">lit</span><span class="p">)</span> <span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC282" class="line" lang="haskell">         <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">body_fn</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">fail</span></span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC278" class="line" lang="haskell">         <span class="kr" style="font-weight: 600;">do</span> <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;"><span class="idiff left">runMatchResult</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">fail</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">mr</span></span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="279" style="width: 35px; color: rgba(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="LC279" class="line" lang="haskell">            <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">LitAlt</span> <span class="n" style="color: #333;">lit</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="280" style="width: 35px; color: rgba(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="LC280" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new_line" data-linenumber="281" style="width: 35px; color: rgba(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="LC281" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">data</span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</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;">MkCaseAlt</span><span class="p">{</span> <span class="n" style="color: #333;">alt_pat</span> <span class="o" style="font-weight: 600;">::</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="LC282" class="line" lang="haskell">                            <span class="n" style="color: #333;">alt_bndrs</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</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;">alt_wrapper</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">HsWrapper</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC288" class="line" lang="haskell">                            <span class="n" style="color: #333;">alt_result</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="p">}</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC284" class="line" lang="haskell">                            <span class="n" style="color: #333;">alt_result</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">CoreExpr</span></span><span class="idiff right"> </span><span class="p">}</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC285" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;"> <span id="LC286" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoAlgCaseMatchResult</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC287" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Id</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Scrutinee</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC288" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Type</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Type of exp</span></span>

</pre>

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<pre style="margin: 0;"> <span id="LC289" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">)</span> <span class="c1" style="color: #998; font-style: italic;">-- ^ Alternatives (bndrs *include* tyvars, dicts)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC294" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">+<span id="LC290" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

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<pre style="margin: 0;"> <span id="LC291" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoAlgCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">match_alts</span></span>

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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell">  <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">isNewtype</span>  <span class="c1" style="color: #998; font-style: italic;">-- Newtype case; use a let</span></span>

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<pre style="margin: 0;"> <span id="LC293" 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;">match_alts_tail</span> <span class="o" style="font-weight: 600;">&&</span> <span class="n" style="color: #333;">null</span> <span class="p">(</span><span class="n" style="color: #333;">tail</span> <span class="n" style="color: #333;">arg_ids1</span><span class="p">)</span> <span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC310" class="line" lang="haskell">                                                <span class="c1" style="color: #998; font-style: italic;">-- (not that splitTyConApp does, these days)</span></span>

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<pre style="margin: 0;"> <span id="LC311" class="line" lang="haskell">    <span class="n" style="color: #333;">newtype_rhs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unwrapNewTypeBody</span> <span class="n" style="color: #333;">tc</span> <span class="n" style="color: #333;">ty_args</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span></span>

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<pre style="margin: 0;"> <span id="LC312" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC317" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoSynCaseMatchResult</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">PatSyn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC318" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoSynCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left">atchResult</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CanFail</span></span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkPatSynCase</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span></span>

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<pre style="margin: 0;">+<span id="LC313" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoSynCaseMatchResult</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">PatSyn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span><span class="idiff left"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">CoreExpr</span></span></span>

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<pre style="margin: 0;">+<span id="LC314" class="line" lang="haskell"><span class="n" style="color: #333;">mkCoSynCaseMatchResult</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">M<span class="idiff left right">R_Fallible</span></span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkPatSynCase</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span></span>

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<pre style="margin: 0;"> <span id="LC315" class="line" lang="haskell"></span>

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<pre style="margin: 0;"> <span id="LC316" class="line" lang="haskell"><span class="n" style="color: #333;">mkPatSynCase</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">PatSyn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;"> <span id="LC317" class="line" lang="haskell"><span class="n" style="color: #333;">mkPatSynCase</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alt</span> <span class="n" style="color: #333;">fail</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="LC318" class="line" lang="haskell">    <span class="n" style="color: #333;">matcher</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">dsLExpr</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkLHsWrap</span> <span class="n" style="color: #333;">wrapper</span> <span class="o" style="font-weight: 600;">$</span></span>

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<pre style="margin: 0;"> <span id="LC319" class="line" lang="haskell">                         <span class="n" style="color: #333;">nlHsTyApp</span> <span class="n" style="color: #333;">matcher</span> <span class="p">[</span><span class="n" style="color: #333;">getRuntimeRep</span> <span class="n" style="color: #333;">ty</span><span class="p">,</span> <span class="n" style="color: #333;">ty</span><span class="p">]</span></span>

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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell">    <span class="kr" style="font-weight: 600;">let</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">mkCont</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">match_result</span></span>

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<pre style="margin: 0;">-<span id="LC325" class="line" lang="haskell">    <span class="n" style="color: #333;">cont</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkCoreLams</span> <span class="n" style="color: #333;">bndrs</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">mkCont</span> <span class="n" style="color: #333;">fail</span></span>

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<pre style="margin: 0;">+<span id="LC320" class="line" lang="haskell">    <span class="n" style="color: #333;">cont</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkCoreLams</span> <span class="n" style="color: #333;">bndrs</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">runMatchResult</span> <span class="n" style="color: #333;">fail</span> <span class="n" style="color: #333;">match_result</span></span>

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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkCoreAppsDs</span> <span class="p">(</span><span class="n" style="color: #333;">text</span> <span class="s" style="color: #d14;">"patsyn"</span> <span class="o" style="font-weight: 600;"><+></span> <span class="n" style="color: #333;">ppr</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">matcher</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">,</span> <span class="n" style="color: #333;">ensure_unstrict</span> <span class="n" style="color: #333;">cont</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">voidArgId</span> <span class="n" style="color: #333;">fail</span><span class="p">]</span></span>

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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">MkCaseAlt</span><span class="p">{</span> <span class="n" style="color: #333;">alt_pat</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">psyn</span><span class="p">,</span></span>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="336" style="width: 35px; color: rgba(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="331" style="width: 35px; color: rgba(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">@@ -336,49 +331,47 @@ mkPatSynCase var ty alt fail = do</td>

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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell">    <span class="n" style="color: #333;">ensure_unstrict</span> <span class="n" style="color: #333;">cont</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">needs_void_lam</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">Lam</span> <span class="n" style="color: #333;">voidArgId</span> <span class="n" style="color: #333;">cont</span></span>

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<pre style="margin: 0;"> <span id="LC332" 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;">cont</span></span>

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

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<pre style="margin: 0;">-<span id="LC339" class="line" lang="haskell"><span class="n" style="color: #333;">mkDataConCase</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span></span>

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<pre style="margin: 0;">-<span id="LC340" class="line" lang="haskell"><span class="n" style="color: #333;">mkDataConCase</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alts</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">alt1</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="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">fail_flag</span> <span class="n" style="color: #333;">mk_case</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"><span class="n" style="color: #333;">mkDataConCase</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;">Type</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NonEmpty</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">CaseAlt</span> <span class="kt" style="color: #458; font-weight: 600;">DataCon</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC335" class="line" lang="haskell"><span class="n" style="color: #333;">mkDataConCase</span> <span class="n" style="color: #333;">var</span> <span class="n" style="color: #333;">ty</span> <span class="n" style="color: #333;">alts</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="n" style="color: #333;">alt1</span> <span class="o" style="font-weight: 600;">:|</span> <span class="kr" style="font-weight: 600;">_</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">+<span id="LC336" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">liftA2</span> <span class="n" style="color: #333;">mk_case</span> <span class="n" style="color: #333;">mk_default</span> <span class="n" style="color: #333;">mk_alts</span></span>

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<pre style="margin: 0;">+<span id="LC337" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- The liftA2 combines the failability of all the alternatives and the default</span></span>

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<pre style="margin: 0;"> <span id="LC338" 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="LC339" class="line" lang="haskell">    <span class="n" style="color: #333;">con1</span>          <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">alt_pat</span> <span class="n" style="color: #333;">alt1</span></span>

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<pre style="margin: 0;"> <span id="LC340" class="line" lang="haskell">    <span class="n" style="color: #333;">tycon</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">dataConTyCon</span> <span class="n" style="color: #333;">con1</span></span>

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<pre style="margin: 0;"> <span id="LC341" class="line" lang="haskell">    <span class="n" style="color: #333;">data_cons</span>     <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tyConDataCons</span> <span class="n" style="color: #333;">tycon</span></span>

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<pre style="margin: 0;">-<span id="LC345" class="line" lang="haskell">    <span class="n" style="color: #333;">match_results</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">alt_result</span> <span class="n" style="color: #333;">alts</span></span>

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

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<pre style="margin: 0;">-<span id="LC347" class="line" lang="haskell">    <span class="n" style="color: #333;">sorted_alts</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NonEmpty</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">CaseAlt</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DataCon</span></span><span class="p"><span class="idiff right">)</span></span></span>

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<pre style="margin: 0;">-<span id="LC348" class="line" lang="haskell">    <span class="n" style="color: #333;">sorted_alts</span>  <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;"><span class="idiff left">NEL</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="n" style="color: #333;"><span class="idiff">sortWith</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">dataConTag</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">alt_pat</span></span><span class="p"><span class="idiff right">)</span></span> <span class="n" style="color: #333;">alts</span></span>

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<pre style="margin: 0;">+<span id="LC343" class="line" lang="haskell">    <span class="n" style="color: #333;">sorted_alts</span> <span class="o" style="font-weight: 600;">::</span> <span class="p"><span class="idiff left">[</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">CaseAlt</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">DataCon</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="LC344" class="line" lang="haskell">    <span class="n" style="color: #333;">sorted_alts</span>  <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;"><span class="idiff left">sortWith</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">dataConTag</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">alt_pat</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">$</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">NEL</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="n" style="color: #333;"><span class="idiff right">toList</span></span> <span class="n" style="color: #333;">alts</span></span>

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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="n" style="color: #333;">var_ty</span>       <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">var</span></span>

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<pre style="margin: 0;"> <span id="LC347" class="line" lang="haskell">    <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span> <span class="n" style="color: #333;">ty_args</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">tcSplitTyConApp</span> <span class="n" style="color: #333;">var_ty</span> <span class="c1" style="color: #998; font-style: italic;">-- Don't look through newtypes</span></span>

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<pre style="margin: 0;"> <span id="LC348" class="line" lang="haskell">                                          <span class="c1" style="color: #998; font-style: italic;">-- (not that splitTyConApp does, these days)</span></span>

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<pre style="margin: 0;"> <span id="LC349" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC354" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_case</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC355" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_case</span> <span class="n" style="color: #333;">fail</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="LC356" class="line" lang="haskell">        <span class="n" style="color: #333;">alts</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mapM</span> <span class="p">(</span><span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span> <span class="n" style="color: #333;">sorted_alts</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC357" class="line" lang="haskell">        <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">mkWildCase</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">ty</span> <span class="p">(</span><span class="n" style="color: #333;">mk_default</span> <span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">++</span> <span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">alts</span><span class="p">)</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC358" class="line" lang="haskell"></span>

</pre>

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<pre style="margin: 0;">-<span id="LC359" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</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;">DsM</span> <span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC360" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">fail</span> <span class="kt" style="color: #458; font-weight: 600;">MkCaseAlt</span><span class="p">{</span> <span class="n" style="color: #333;">alt_pat</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">con</span><span class="p">,</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC361" class="line" lang="haskell">                           <span class="n" style="color: #333;">alt_bndrs</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="LC362" class="line" lang="haskell">                           <span class="n" style="color: #333;">alt_result</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kr" style="font-weight: 600;">_</span> <span class="n" style="color: #333;">body_fn</span> <span class="p">}</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC363" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">body_fn</span> <span class="n" style="color: #333;">fail</span></span>

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<pre style="margin: 0;">-<span id="LC364" class="line" lang="haskell">           <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dataConBoxer</span> <span class="n" style="color: #333;">con</span> <span class="kr" style="font-weight: 600;">of</span> <span class="p">{</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC365" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataAlt</span> <span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="p">;</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC366" 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;">DCB</span> <span class="n" style="color: #333;">boxer</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="LC367" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">us</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newUniqueSupply</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC368" class="line" lang="haskell">           <span class="p">;</span> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">rep_ids</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initUs_</span> <span class="n" style="color: #333;">us</span> <span class="p">(</span><span class="n" style="color: #333;">boxer</span> <span class="n" style="color: #333;">ty_args</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="LC369" class="line" lang="haskell">           <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataAlt</span> <span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">rep_ids</span><span class="p">,</span> <span class="n" style="color: #333;">mkLets</span> <span class="n" style="color: #333;">binds</span> <span class="n" style="color: #333;">body</span><span class="p">)</span> <span class="p">}</span> <span class="p">}</span> <span class="p">}</span></span>

</pre>

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

</pre>

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<td class="diff-line-num old old_line" data-linenumber="371" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC371" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_default</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="372" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

372

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<pre style="margin: 0;">-<span id="LC372" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_default</span> <span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">exhaustive_case</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 old_line" data-linenumber="373" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC373" 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="kt" style="color: #458; font-weight: 600;">DEFAULT</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">fail</span><span class="p">)]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="374" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC374" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="375" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

375

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<pre style="margin: 0;">-<span id="LC375" class="line" lang="haskell">    <span class="n" style="color: #333;">fail_flag</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CanItFail</span></span>

</pre>

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<pre style="margin: 0;">-<span id="LC376" class="line" lang="haskell">    <span class="n" style="color: #333;">fail_flag</span> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">exhaustive_case</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="377" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC377" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">foldr</span> <span class="n" style="color: #333;">orFail</span> <span class="kt" style="color: #458; font-weight: 600;">CantFail</span> <span class="p">[</span><span class="n" style="color: #333;">can_it_fail</span> <span class="o" style="font-weight: 600;">|</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="n" style="color: #333;">can_it_fail</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;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">match_results</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="378" style="width: 35px; color: rgba(0,0,0,0.3); 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="350" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC378" 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 old old_line" data-linenumber="379" style="width: 35px; color: rgba(0,0,0,0.3); 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="350" style="width: 35px; color: rgba(0,0,0,0.3); 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="LC379" class="line" lang="haskell">              <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">CanFail</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">

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<td class="diff-line-num new_line old" data-linenumber="350" style="width: 35px; color: rgba(0,0,0,0.3); 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>

</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">

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<td class="diff-line-num new_line old" data-linenumber="350" style="width: 35px; color: rgba(0,0,0,0.3); 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 class="n" style="color: #333;">mentioned_constructors</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUniqSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">alt_pat</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">NEL</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">alts</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="382" style="width: 35px; color: rgba(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="350" style="width: 35px; color: rgba(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="LC350" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_case</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;">CoreAlt</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span><span class="p">]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="382" style="width: 35px; color: rgba(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="351" style="width: 35px; color: rgba(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="LC351" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_case</span> <span class="n" style="color: #333;">def</span> <span class="n" style="color: #333;">alts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkWildCase</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Var</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="p">(</span><span class="n" style="color: #333;">idType</span> <span class="n" style="color: #333;">var</span><span class="p">)</span> <span class="n" style="color: #333;">ty</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="382" style="width: 35px; color: rgba(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="352" style="width: 35px; color: rgba(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="LC352" class="line" lang="haskell">      <span class="n" style="color: #333;">maybeToList</span> <span class="n" style="color: #333;">def</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">alts</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="353" style="width: 35px; color: rgba(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="LC353" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="354" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC354" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alts</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="355" style="width: 35px; color: rgba(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="LC355" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alts</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">traverse</span> <span class="n" style="color: #333;">mk_alt</span> <span class="n" style="color: #333;">sorted_alts</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="356" style="width: 35px; color: rgba(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="LC356" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="357" style="width: 35px; color: rgba(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="LC357" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">CaseAlt</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;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreAlt</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="358" style="width: 35px; color: rgba(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="LC358" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_alt</span> <span class="kt" style="color: #458; font-weight: 600;">MkCaseAlt</span> <span class="p">{</span> <span class="n" style="color: #333;">alt_pat</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">con</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="359" style="width: 35px; color: rgba(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="LC359" class="line" lang="haskell">                     <span class="p">,</span> <span class="n" style="color: #333;">alt_bndrs</span> <span class="o" style="font-weight: 600;">=</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="360" style="width: 35px; color: rgba(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="LC360" class="line" lang="haskell">                     <span class="p">,</span> <span class="n" style="color: #333;">alt_result</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">match_result</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="361" style="width: 35px; color: rgba(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="LC361" class="line" lang="haskell">      <span class="n" style="color: #333;">flip</span> <span class="n" style="color: #333;">adjustMatchResultDs</span> <span class="n" style="color: #333;">match_result</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;">body</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 new new_line" data-linenumber="362" style="width: 35px; color: rgba(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="LC362" class="line" lang="haskell">        <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dataConBoxer</span> <span class="n" style="color: #333;">con</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="363" style="width: 35px; color: rgba(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="LC363" 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="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataAlt</span> <span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">args</span><span class="p">,</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="364" style="width: 35px; color: rgba(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="LC364" 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;">DCB</span> <span class="n" style="color: #333;">boxer</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 new new_line" data-linenumber="365" style="width: 35px; color: rgba(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="LC365" class="line" lang="haskell">            <span class="n" style="color: #333;">us</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newUniqueSupply</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="366" style="width: 35px; color: rgba(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="LC366" class="line" lang="haskell">            <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">rep_ids</span><span class="p">,</span> <span class="n" style="color: #333;">binds</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">initUs_</span> <span class="n" style="color: #333;">us</span> <span class="p">(</span><span class="n" style="color: #333;">boxer</span> <span class="n" style="color: #333;">ty_args</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="367" style="width: 35px; color: rgba(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="LC367" class="line" lang="haskell">            <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">DataAlt</span> <span class="n" style="color: #333;">con</span><span class="p">,</span> <span class="n" style="color: #333;">rep_ids</span><span class="p">,</span> <span class="n" style="color: #333;">mkLets</span> <span class="n" style="color: #333;">binds</span> <span class="n" style="color: #333;">body</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="382" style="width: 35px; color: rgba(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="368" style="width: 35px; color: rgba(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="LC368" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="369" style="width: 35px; color: rgba(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="LC369" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_default</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</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;">CoreAlt</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="370" style="width: 35px; color: rgba(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="LC370" class="line" lang="haskell">    <span class="n" style="color: #333;">mk_default</span></span>

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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell">      <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">exhaustive_case</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>

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<pre style="margin: 0;">+<span id="LC372" 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;">MR_Fallible</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">fail</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</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;">DEFAULT</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span><span class="p">,</span> <span class="n" style="color: #333;">fail</span><span class="p">)</span></span>

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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC374" class="line" lang="haskell">    <span class="n" style="color: #333;">mentioned_constructors</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUniqSet</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">map</span> <span class="n" style="color: #333;">alt_pat</span> <span class="n" style="color: #333;">sorted_alts</span></span>

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<pre style="margin: 0;"> <span id="LC375" class="line" lang="haskell">    <span class="n" style="color: #333;">un_mentioned_constructors</span></span>

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<pre style="margin: 0;"> <span id="LC376" class="line" lang="haskell">        <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkUniqSet</span> <span class="n" style="color: #333;">data_cons</span> <span class="p">`</span><span class="n" style="color: #333;">minusUniqSet</span><span class="p">`</span> <span class="n" style="color: #333;">mentioned_constructors</span></span>

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<pre style="margin: 0;"> <span id="LC377" class="line" lang="haskell">    <span class="n" style="color: #333;">exhaustive_case</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">isEmptyUniqSet</span> <span class="n" style="color: #333;">un_mentioned_constructors</span></span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -857,6 +850,18 @@ mkFailurePair expr</td>

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<pre style="margin: 0;"> <span id="LC850" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;"> <span id="LC851" class="line" lang="haskell">    <span class="n" style="color: #333;">ty</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">exprType</span> <span class="n" style="color: #333;">expr</span></span>

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<pre style="margin: 0;"> <span id="LC852" class="line" lang="haskell"></span>

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<pre style="margin: 0;">+<span id="LC853" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Uses '@mkFailurePair@' to bind the failure case. Infallible matches have</span></span>

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<pre style="margin: 0;">+<span id="LC854" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- neither a failure arg or failure "hole", so nothing is let-bound, and no</span></span>

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<pre style="margin: 0;">+<span id="LC855" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- extraneous Core is produced.</span></span>

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<pre style="margin: 0;">+<span id="LC856" class="line" lang="haskell"><span class="n" style="color: #333;">shareFailureHandler</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MatchResult</span> <span class="kt" style="color: #458; font-weight: 600;">CoreExpr</span></span>

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<pre style="margin: 0;">+<span id="LC857" class="line" lang="haskell"><span class="n" style="color: #333;">shareFailureHandler</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;">case</span></span>

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<pre style="margin: 0;">+<span id="LC858" class="line" lang="haskell">  <span class="n" style="color: #333;">mr</span><span class="o" style="font-weight: 600;">@</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MR_Infallible</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;">mr</span></span>

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859

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<pre style="margin: 0;">+<span id="LC859" class="line" lang="haskell">  <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</span> <span class="n" style="color: #333;">match_fn</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">MR_Fallible</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;">fail_expr</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>

<td class="diff-line-num new new_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

860

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<pre style="margin: 0;">+<span id="LC860" class="line" lang="haskell">    <span class="p">(</span><span class="n" style="color: #333;">fail_bind</span><span class="p">,</span> <span class="n" style="color: #333;">shared_failure_handler</span><span class="p">)</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mkFailurePair</span> <span class="n" style="color: #333;">fail_expr</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="861" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

861

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<pre style="margin: 0;">+<span id="LC861" class="line" lang="haskell">    <span class="n" style="color: #333;">body</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">match_fn</span> <span class="n" style="color: #333;">shared_failure_handler</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

862

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<pre style="margin: 0;">+<span id="LC862" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Never unboxed, per the above, so always OK for `let` not `case`.</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="863" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

863

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<pre style="margin: 0;">+<span id="LC863" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Let</span> <span class="n" style="color: #333;">fail_bind</span> <span class="n" style="color: #333;">body</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="864" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

864

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<pre style="margin: 0;">+<span id="LC864" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="860" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

860

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<td class="diff-line-num new_line" data-linenumber="865" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

865

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<pre style="margin: 0;"> <span id="LC865" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{-</span></span>

</pre>

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861

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<td class="diff-line-num new_line" data-linenumber="866" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

866

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<pre style="margin: 0;"> <span id="LC866" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Failure thunks and CPR]</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="862" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

862

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<td class="diff-line-num new_line" data-linenumber="867" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

867

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<pre style="margin: 0;"> <span id="LC867" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>

</pre>

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