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<title>Data/Vector/Fusion/Util.hs</title>
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<pre><a name="line-1"></a><span class='hs-cpp'>#</span><span class='hs-keyword'>if</span> <span class='hs-sel'>__GLASGOW_HASKELL__</span> <span class='hs-varop'>>=</span> <span class='hs-num'>703</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE Safe #-}</span>
<a name="line-3"></a><span class='hs-cpp'>#elif __GLASGOW_HASKELL__ >= 701</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE Trustworthy #-}</span>
<a name="line-5"></a><span class='hs-cpp'>#endif</span>
<a name="line-6"></a><span class='hs-comment'>-- |</span>
<a name="line-7"></a><span class='hs-comment'>-- Module : Data.Vector.Fusion.Util</span>
<a name="line-8"></a><span class='hs-comment'>-- Copyright : (c) Roman Leshchinskiy 2009</span>
<a name="line-9"></a><span class='hs-comment'>-- License : BSD-style</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Maintainer : Roman Leshchinskiy <rl@cse.unsw.edu.au></span>
<a name="line-12"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-13"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-14"></a><span class='hs-comment'>-- </span>
<a name="line-15"></a><span class='hs-comment'>-- Fusion-related utility types</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Vector</span><span class='hs-varop'>.</span><span class='hs-conid'>Fusion</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span> <span class='hs-layout'>(</span>
<a name="line-19"></a> <span class='hs-conid'>Id</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Box</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-20"></a>
<a name="line-21"></a> <span class='hs-varid'>delay_inline</span><span class='hs-layout'>,</span> <span class='hs-varid'>delayed_min</span>
<a name="line-22"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="Id"></a><span class='hs-comment'>-- | Identity monad</span>
<a name="line-25"></a><a name="Id"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Id</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Id</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unId</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-26"></a>
<a name="line-27"></a><a name="instance%20Functor%20Id"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Id</span> <span class='hs-keyword'>where</span>
<a name="line-28"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Id</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Id</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-29"></a>
<a name="line-30"></a><a name="instance%20Monad%20Id"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-conid'>Id</span> <span class='hs-keyword'>where</span>
<a name="line-31"></a> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Id</span>
<a name="line-32"></a> <span class='hs-conid'>Id</span> <span class='hs-varid'>x</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="Box"></a><span class='hs-comment'>-- | Box monad</span>
<a name="line-35"></a><a name="Box"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Box</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Box</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="instance%20Functor%20Box"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Box</span> <span class='hs-keyword'>where</span>
<a name="line-38"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Box</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Box</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-39"></a>
<a name="line-40"></a><a name="instance%20Monad%20Box"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-conid'>Box</span> <span class='hs-keyword'>where</span>
<a name="line-41"></a> <span class='hs-varid'>return</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Box</span>
<a name="line-42"></a> <span class='hs-conid'>Box</span> <span class='hs-varid'>x</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="delay_inline"></a><span class='hs-comment'>-- | Delay inlining a function until late in the game (simplifier phase 0).</span>
<a name="line-45"></a><span class='hs-definition'>delay_inline</span> <span class='hs-keyglyph'>::</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-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-46"></a><span class='hs-comment'>{-# INLINE [0] delay_inline #-}</span>
<a name="line-47"></a><span class='hs-definition'>delay_inline</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span>
<a name="line-48"></a>
<a name="line-49"></a><a name="delayed_min"></a><span class='hs-comment'>-- | `min` inlined in phase 0</span>
<a name="line-50"></a><span class='hs-definition'>delayed_min</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-51"></a><span class='hs-comment'>{-# INLINE [0] delayed_min #-}</span>
<a name="line-52"></a><span class='hs-definition'>delayed_min</span> <span class='hs-varid'>m</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>min</span> <span class='hs-varid'>m</span> <span class='hs-varid'>n</span>
<a name="line-53"></a>
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