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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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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/09a36e80ecaefcfb60eccda98bd06461d0aeca70">09a36e80</a></strong>
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<span>by Ömer Sinan Ağacan</span>
<i>at 2020-03-31T10:55:37-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Simplify stderrSupportsAnsiColors
The combinator andM is used only once, and the code is shorter and
simpler if you inline it.
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<h4>1 changed file:</h4>
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<a href="#b5293b078eb6c44f702248dd629f1afc4cb6a1b1">
compiler/main/SysTools/Terminal.hs
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<h4>Changes:</h4>
<li id="b5293b078eb6c44f702248dd629f1afc4cb6a1b1">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/09a36e80ecaefcfb60eccda98bd06461d0aeca70#b5293b078eb6c44f702248dd629f1afc4cb6a1b1"><strong>compiler/main/SysTools/Terminal.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -32,20 +32,13 @@ import qualified System.Win32 as Win32</td>
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<pre style="margin: 0;"> <span id="LC32" class="line" lang="haskell"><span class="n" style="color: #333;">stderrSupportsAnsiColors</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;"> <span id="LC33" class="line" lang="haskell"><span class="n" style="color: #333;">stderrSupportsAnsiColors</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="LC34" 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;">defined</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MIN_VERSION_terminfo</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">queryTerminal</span> <span class="n" style="color: #333;">stdError</span> <span class="p">`</span><span class="n" style="color: #333;">andM</span><span class="p">`</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC36" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">termSupportsColors</span> <span class="o" style="font-weight: 600;"><$></span> <span class="n" style="color: #333;">setupTermFromEnv</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC37" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">catch</span><span class="p">`</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SetupTermError</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC38" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">-<span id="LC39" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">stderr_available</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">queryTerminal</span> <span class="n" style="color: #333;">stdError</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">stderr_available</span> <span class="kr" style="font-weight: 600;">then</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">termSupportsColors</span> <span class="n" style="color: #333;">setupTermFromEnv</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"> <span class="p">`</span><span class="n" style="color: #333;">catch</span><span class="p">`</span> <span class="nf" style="color: #900; font-weight: 600;">\</span> <span class="p">(</span><span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">SetupTermError</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"> <span class="n" style="color: #333;">pure</span> <span class="kt" style="color: #458; font-weight: 600;">False</span></span>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC41" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC42" class="line" lang="haskell"> <span class="n" style="color: #333;">andM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monad</span> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">m</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>
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<pre style="margin: 0;">-<span id="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">andM</span> <span class="n" style="color: #333;">mx</span> <span class="n" style="color: #333;">my</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="LC44" class="line" lang="haskell"> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">mx</span></span>
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<pre style="margin: 0;">-<span id="LC45" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">if</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">-<span id="LC46" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">then</span> <span class="n" style="color: #333;">my</span></span>
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<pre style="margin: 0;">-<span id="LC47" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">else</span> <span class="n" style="color: #333;">pure</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">-<span id="LC48" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"> <span class="n" style="color: #333;">termSupportsColors</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Terminal</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="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">termSupportsColors</span> <span class="n" style="color: #333;">term</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fromMaybe</span> <span class="mi" style="color: #099;">0</span> <span class="p">(</span><span class="n" style="color: #333;">getCapability</span> <span class="n" style="color: #333;">term</span> <span class="n" style="color: #333;">termColors</span><span class="p">)</span> <span class="o" style="font-weight: 600;">></span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC44" class="line" lang="haskell"></span>
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