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<title>Data/Generics/PlateInternal.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, Rank2Types, MagicHash, UnboxedTuples #-}</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'>PlateInternal</span><span class='hs-layout'>(</span>
<a name="line-8"></a> <span class='hs-varid'>unsafeCast</span><span class='hs-layout'>,</span> <span class='hs-varid'>inlinePerformIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>builder</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>
<a name="line-12"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-13"></a><span class='hs-comment'>-- GHC</span>
<a name="line-14"></a><span class='hs-comment'>{-
<a name="line-15"></a>#if !__GLASGOW_HASKELL__
<a name="line-16"></a>{-
<a name="line-17"></a>#endif
<a name="line-18"></a>-}
<a name="line-19"></a>
<a name="line-20"></a>import GHC.Exts(unsafeCoerce#, build, realWorld#)
<a name="line-21"></a>#if __GLASGOW_HASKELL__ < 612
<a name="line-22"></a>import GHC.IOBase(IO(IO))
<a name="line-23"></a>#else
<a name="line-24"></a>import GHC.IO(IO(IO))
<a name="line-25"></a>#endif
<a name="line-26"></a>
<a name="line-27"></a>{-# INLINE unsafeCast #-}
<a name="line-28"></a>-- | @unsafeCoerce@, but for all compilers. In future this can be obtained from
<a name="line-29"></a>-- @Unsafe.Coerce.unsafeCoerce@, but thats too recent a change.
<a name="line-30"></a>unsafeCast :: a -> b
<a name="line-31"></a>unsafeCast = unsafeCoerce#
<a name="line-32"></a>
<a name="line-33"></a>{-# INLINE builder #-}
<a name="line-34"></a>-- | GHCs @foldr@\/@build@ system, but on all platforms
<a name="line-35"></a>builder :: forall a . (forall b . (a -> b -> b) -> b -> b) -> [a]
<a name="line-36"></a>builder = build
<a name="line-37"></a>
<a name="line-38"></a>{-# INLINE inlinePerformIO #-}
<a name="line-39"></a>-- | 'unsafePerformIO', but suitable for inlining. Copied from "Data.ByteString.Base".
<a name="line-40"></a>inlinePerformIO :: IO a -> a
<a name="line-41"></a>inlinePerformIO (IO m) = case m realWorld# of (# _, r #) -> r
<a name="line-42"></a>
<a name="line-43"></a>{-
<a name="line-44"></a>#if !__GLASGOW_HASKELL__
<a name="line-45"></a>-}
<a name="line-46"></a>#endif
<a name="line-47"></a>-}</span>
<a name="line-48"></a>
<a name="line-49"></a>
<a name="line-50"></a>
<a name="line-51"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-52"></a><span class='hs-comment'>-- !GHC</span>
<a name="line-53"></a><span class='hs-comment'>{-
<a name="line-54"></a>#if !__GLASGOW_HASKELL__
<a name="line-55"></a>-}</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Typeable</span>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="unsafeCast"></a><span class='hs-definition'>unsafeCast</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-62"></a><span class='hs-definition'>unsafeCast</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromJust</span> <span class='hs-varop'>.</span> <span class='hs-varid'>cast</span>
<a name="line-63"></a>
<a name="line-64"></a><a name="inlinePerformIO"></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-65"></a><span class='hs-definition'>inlinePerformIO</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="builder"></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-68"></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-69"></a>
<a name="line-70"></a><span class='hs-comment'>{-
<a name="line-71"></a>#endif
<a name="line-72"></a>-}</span>
<a name="line-73"></a>
<a name="line-74"></a>
<a name="line-75"></a>
<a name="line-76"></a>
<a name="line-77"></a><a name="concatCont"></a><span class='hs-comment'>{-# INLINE concatCont #-}</span>
<a name="line-78"></a><span class='hs-comment'>-- | Perform concatentation of continuations</span>
<a name="line-79"></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-80"></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>
<a name="line-81"></a>
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