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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/1d43d4a3e45d86261fa63591e99749cb7d3f68ed">1d43d4a3</a></strong>
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<span>by Nathan Collins</span>
<i>at 2019-06-01T03:55:49Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve ThreadId Show instance
By making it include parens when a derived instance would. For example, this changes the (hypothetical) code `show (Just (ThreadId 3))` to produce `"Just (ThreadId 3)"` instead of the current `"Just ThreadId 3"`.
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<h4>1 changed file:</h4>
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<a href="#484e50173b324b5842d294580ec9ed8a7b0d5d38">
libraries/base/GHC/Conc/Sync.hs
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<h4>Changes:</h4>
<li id="484e50173b324b5842d294580ec9ed8a7b0d5d38">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/1d43d4a3e45d86261fa63591e99749cb7d3f68ed#484e50173b324b5842d294580ec9ed8a7b0d5d38"><strong>libraries/base/GHC/Conc/Sync.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">@@ -113,7 +113,7 @@ import GHC.IORef</td>
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.MVar</span></span>
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Ptr</span></span>
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<pre style="margin: 0;"> <span id="LC115" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Real</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">fromIntegral</span> <span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC116" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Show</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Show</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;">showString</span> <span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC116" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Show</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">Show</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;">show<span class="idiff left">Paren</span></span><span class="p"><span class="idiff">,</span></span><span class="idiff"> </span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff right">show</span>String</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Stable</span> <span class="p">(</span> <span class="kt" style="color: #458; font-weight: 600;">StablePtr</span><span class="p">(</span><span class="o" style="font-weight: 600;">..</span><span class="p">)</span> <span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Weak</span></span>
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="haskell"></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</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">@@ -145,7 +145,7 @@ This misfeature will hopefully be corrected at a later date.</td>
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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell"><span class="cd">-- | @since 4.2.0.0</span></span>
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<pre style="margin: 0;"> <span id="LC147" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Show</span> <span class="kt" style="color: #458; font-weight: 600;">ThreadId</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC148" class="line" lang="haskell"> <span class="n" style="color: #333;">showsPrec</span> <span class="n" style="color: #333;">d</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">+<span id="LC148" class="line" lang="haskell"> <span class="n" style="color: #333;">showsPrec</span> <span class="n" style="color: #333;">d</span> <span class="n" style="color: #333;">t</span> <span class="o" style="font-weight: 600;">=</span><span class="idiff left"> </span><span class="n" style="color: #333;"><span class="idiff">showParen</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="n" style="color: #333;"><span class="idiff">d</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">>=</span></span><span class="idiff"> </span><span class="mi" style="color: #099;"><span class="idiff">11</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">$</span></span></span>
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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell"> <span class="n" style="color: #333;">showString</span> <span class="s" style="color: #d14;">"ThreadId "</span> <span class="o" style="font-weight: 600;">.</span></span>
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<pre style="margin: 0;"> <span id="LC150" class="line" lang="haskell"> <span class="n" style="color: #333;">showsPrec</span> <span class="n" style="color: #333;">d</span> <span class="p">(</span><span class="n" style="color: #333;">getThreadId</span> <span class="p">(</span><span class="n" style="color: #333;">id2TSO</span> <span class="n" style="color: #333;">t</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC151" class="line" lang="haskell"></span>
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