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<title>Data/Generics/Uniplate/Internal/Utils.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, Rank2Types, MagicHash, UnboxedTuples, ExistentialQuantification #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>{- |
<a name="line-4"></a> Internal module, do not import or use.
<a name="line-5"></a>-}</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Generics</span><span class='hs-varop'>.</span><span class='hs-conid'>Uniplate</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-layout'>(</span>
<a name="line-8"></a> <span class='hs-varid'>unsafeCoerce</span><span class='hs-layout'>,</span> <span class='hs-varid'>builder</span><span class='hs-layout'>,</span> <span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>inlinePerformIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>concatCont</span>
<a name="line-9"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Unsafe</span><span class='hs-varop'>.</span><span class='hs-conid'>Coerce</span><span class='hs-layout'>(</span><span class='hs-varid'>unsafeCoerce</span><span class='hs-layout'>)</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Exts</span><span class='hs-layout'>(</span><span class='hs-varid'>build</span><span class='hs-layout'>,</span> <span class='hs-varid'>realWorld</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-16"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 612</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IOBase</span><span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-18"></a><span class='hs-cpp'>#else</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-layout'>(</span><span class='hs-conid'>IO</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-20"></a><span class='hs-cpp'>#endif</span>
<a name="line-21"></a><span class='hs-cpp'>#endif</span>
<a name="line-22"></a>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-comment'>{-# INLINE builder #-}</span>
<a name="line-25"></a><span class='hs-comment'>-- | GHCs @foldr@\/@build@ system, but on all platforms</span>
<a name="line-26"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-27"></a><a name="builder"></a><span class='hs-definition'>builder</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>b</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-28"></a><span class='hs-definition'>builder</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>build</span>
<a name="line-29"></a><span class='hs-cpp'>#else</span>
<a name="line-30"></a><span class='hs-definition'>builder</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-31"></a><span class='hs-definition'>builder</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-32"></a><span class='hs-cpp'>#endif</span>
<a name="line-33"></a>
<a name="line-34"></a>
<a name="line-35"></a><a name="inlinePerformIO"></a><span class='hs-comment'>{-# INLINE inlinePerformIO #-}</span>
<a name="line-36"></a><span class='hs-comment'>-- | 'unsafePerformIO', but suitable for inlining. Copied from "Data.ByteString.Base".</span>
<a name="line-37"></a><span class='hs-definition'>inlinePerformIO</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-38"></a><span class='hs-cpp'>#ifdef __GLASGOW_HASKELL__</span>
<a name="line-39"></a><span class='hs-definition'>inlinePerformIO</span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>m</span> <span class='hs-varid'>realWorld</span><span class='hs-cpp'>#</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>(</span><span class='hs-cpp'>#</span> <span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span> <span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>r</span>
<a name="line-40"></a><span class='hs-cpp'>#else</span>
<a name="line-41"></a><span class='hs-definition'>inlinePerformIO</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span>
<a name="line-42"></a><span class='hs-cpp'>#endif</span>
<a name="line-43"></a>
<a name="line-44"></a>
<a name="line-45"></a><a name="concatCont"></a><span class='hs-comment'>{-# INLINE concatCont #-}</span>
<a name="line-46"></a><span class='hs-comment'>-- | Perform concatentation of continuations</span>
<a name="line-47"></a><span class='hs-definition'>concatCont</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-48"></a><span class='hs-definition'>concatCont</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>rest</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span><span class='hs-layout'>)</span> <span class='hs-varid'>rest</span> <span class='hs-varid'>xs</span>
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