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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>
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<h4>
Commits:
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<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/581cbc28e143a4ed8e7f794ed1618161222a5646">581cbc28</a></strong>
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<span>by Erik de Castro Lopo</span>
<i>at 2019-06-24T05:12:22Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add MonadFail instance for ParserM
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<h4>1 changed file:</h4>
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<a href="#275e1b197244fce39b053dae83c94e18699fb1fd">
utils/genprimopcode/ParserM.hs
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<h4>Changes:</h4>
<li id="275e1b197244fce39b053dae83c94e18699fb1fd">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/581cbc28e143a4ed8e7f794ed1618161222a5646#275e1b197244fce39b053dae83c94e18699fb1fd"><strong>utils/genprimopcode/ParserM.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">ParserM</span> <span class="p">(</span></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell">    <span class="c1" style="color: #998; font-style: italic;">-- Parser Monad</span></span>
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<pre style="margin: 0;"> <span id="LC4" class="line" lang="haskell">    <span class="kt" style="color: #458; font-weight: 600;">ParserM</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;">AlexInput</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">run_parser</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">@@ -18,7 +19,13 @@ module ParserM (</td>
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<pre style="margin: 0;"> <span id="LC19" class="line" lang="haskell"> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Applicative</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">__GLASGOW_HASKELL__</span> <span class="o" style="font-weight: 600;">>=</span> <span class="mi" style="color: #099;">806</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Prelude</span> <span class="k" style="font-weight: 600;">hiding</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">fail</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.Fail</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MonadFail</span> <span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">))</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">else</span></span>
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<pre style="margin: 0;"> <span id="LC27" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Prelude</span></span>
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">endif</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"></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;">Control.Monad</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">ap</span><span class="p">,</span> <span class="nf" style="color: #900; font-weight: 600;">liftM</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;">Data.Word</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Word8</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">@@ -42,6 +49,10 @@ instance Monad ParserM where</td>
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<pre style="margin: 0;"> <span id="LC49" class="line" lang="haskell">                                            <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="n" style="color: #333;">err</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell">                                                <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="n" style="color: #333;">err</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell">    <span class="n" style="color: #333;">return</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;">ParserM</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;">i</span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Right</span> <span class="p">(</span><span class="n" style="color: #333;">i</span><span class="p">,</span> <span class="n" style="color: #333;">s</span><span class="p">,</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC53" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">__GLASGOW_HASKELL__</span> <span class="o" style="font-weight: 600;">>=</span> <span class="mi" style="color: #099;">806</span></span>
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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">MonadFail</span> <span class="kt" style="color: #458; font-weight: 600;">ParserM</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">endif</span></span>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell">    <span class="n" style="color: #333;">fail</span> <span class="n" style="color: #333;">err</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">ParserM</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="kr" style="font-weight: 600;">_</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="n" style="color: #333;">err</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="n" style="color: #333;">run_parser</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">ParserM</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Either</span> <span class="kt" style="color: #458; font-weight: 600;">String</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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