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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, Rank2Types, MagicHash, UnboxedTuples, ExistentialQuantification, ScopedTypeVariables #-}</span>
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<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'>Data</span> <span class='hs-keyword'>where</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-keyword'>import</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'>Str</span>
<a name="line-10"></a><span class='hs-keyword'>import</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>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Generics</span>
<a name="line-13"></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-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntSet</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>IntSet</span>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntSet</span><span class='hs-layout'>(</span><span class='hs-conid'>IntSet</span><span class='hs-layout'>)</span>
<a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>IntMap</span>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span><span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span><span class='hs-layout'>)</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span>
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<a name="line-22"></a>
<a name="line-23"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-24"></a><span class='hs-comment'>-- HIT TEST</span>
<a name="line-25"></a>
<a name="line-26"></a>
<a name="line-27"></a><a name="Answer"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Answer</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Hit</span> <span class='hs-layout'>{</span><span class='hs-varid'>fromHit</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>}</span> <span class='hs-comment'>-- you just hit the element you were after (here is a cast)</span>
<a name="line-28"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Follow</span> <span class='hs-comment'>-- go forward, you will find something</span>
<a name="line-29"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Miss</span> <span class='hs-comment'>-- you failed to sink my battleship!</span>
<a name="line-30"></a>
<a name="line-31"></a><a name="Oracle"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Oracle</span> <span class='hs-varid'>to</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Oracle</span> <span class='hs-layout'>{</span><span class='hs-varid'>fromOracle</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>on</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Answer</span> <span class='hs-varid'>to</span><span class='hs-layout'>}</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="hitTest"></a><span class='hs-comment'>{-# INLINE hitTest #-}</span>
<a name="line-34"></a><span class='hs-definition'>hitTest</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span> <span class='hs-varid'>from</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>from</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>to</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Oracle</span> <span class='hs-varid'>to</span>
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<a name="line-36"></a>
<a name="line-37"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 606</span>
<a name="line-38"></a><span class='hs-comment'>-- GHC 6.4.2 does not export typeRepKey, so we can't do the trick</span>
<a name="line-39"></a><span class='hs-comment'>-- as efficiently, so we just give up and revert to always following</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-definition'>hitTest</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Oracle</span> <span class='hs-varop'>.</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>Follow</span> <span class='hs-conid'>Hit</span> <span class='hs-varop'>.</span> <span class='hs-varid'>cast</span>
<a name="line-42"></a>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-cpp'>#elif 0</span>
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<a name="line-46"></a>
<a name="line-47"></a><span class='hs-definition'>hitTest</span> <span class='hs-varid'>from</span> <span class='hs-varid'>to</span> <span class='hs-keyglyph'>=</span>
<a name="line-48"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>kto</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>to</span>
<a name="line-49"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>hitTestQuery</span> <span class='hs-layout'>(</span><span class='hs-varid'>dataBox</span> <span class='hs-varid'>from</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>of</span>
<a name="line-50"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Oracle</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>on</span> <span class='hs-varop'>==</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Hit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>on</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Follow</span>
<a name="line-51"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>cache</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cacheHitTest</span> <span class='hs-varid'>cache</span> <span class='hs-keyword'>in</span>
<a name="line-52"></a> <span class='hs-conid'>Oracle</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>kon</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>on</span> <span class='hs-keyword'>in</span>
<a name="line-53"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>kon</span> <span class='hs-varop'>==</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Hit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>on</span>
<a name="line-54"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>test</span> <span class='hs-varid'>kon</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Follow</span>
<a name="line-55"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Miss</span>
<a name="line-56"></a>
<a name="line-57"></a>
<a name="line-58"></a><a name="cacheHitTest"></a><span class='hs-comment'>-- A cache hit test, but partially evaluated</span>
<a name="line-59"></a><span class='hs-comment'>{-# INLINE cacheHitTest #-}</span>
<a name="line-60"></a><span class='hs-definition'>cacheHitTest</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-61"></a><span class='hs-definition'>cacheHitTest</span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-varid'>hit</span> <span class='hs-varid'>miss</span><span class='hs-layout'>)</span>
<a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>hit</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-conid'>False</span>
<a name="line-63"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>miss</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-conid'>True</span>
<a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</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-varid'>x</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>hit</span>
<a name="line-65"></a>
<a name="line-66"></a>
<a name="line-67"></a><a name="Cache"></a><span class='hs-comment'>-- hit means that this value may result in a hit</span>
<a name="line-68"></a><a name="Cache"></a><span class='hs-comment'>-- miss means that this value will never result in a hit</span>
<a name="line-69"></a><a name="Cache"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cache</span> <span class='hs-layout'>{</span><span class='hs-varid'>hit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IntSet</span><span class='hs-layout'>,</span> <span class='hs-varid'>miss</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IntSet</span><span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-70"></a><a name="newCache"></a><span class='hs-definition'>newCache</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cache</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-71"></a>
<a name="line-72"></a>
<a name="line-73"></a><a name="hitTestCache"></a><span class='hs-comment'>-- Indexed by the @from@ type, then the @to@ type</span>
<a name="line-74"></a><span class='hs-comment'>-- Nothing means that we can't perform the trick on the set</span>
<a name="line-75"></a><span class='hs-comment'>{-# NOINLINE hitTestCache #-}</span>
<a name="line-76"></a><span class='hs-definition'>hitTestCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Cache</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-77"></a><span class='hs-definition'>hitTestCache</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-78"></a>
<a name="line-79"></a>
<a name="line-80"></a><a name="hitTestQuery"></a><span class='hs-definition'>hitTestQuery</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Cache</span>
<a name="line-81"></a><span class='hs-definition'>hitTestQuery</span> <span class='hs-varid'>from</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>vfrom</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-82"></a> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>hitTestCache</span>
<a name="line-83"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>mp</span> <span class='hs-varop'>>>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>kto</span>
<a name="line-84"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-85"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>ans</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>ans</span>
<a name="line-86"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-87"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toCache</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hitTestAdd</span> <span class='hs-varid'>from</span> <span class='hs-varid'>kto</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-88"></a> <span class='hs-varid'>res2</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>res</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-89"></a> <span class='hs-comment'>-- -- uncomment these lines to see where type search fails</span>
<a name="line-90"></a> <span class='hs-comment'>-- if isNothing res2 then print ("failure",show (typeOf vfrom),kfrom,kto) else return ()</span>
<a name="line-91"></a>
<a name="line-92"></a> <span class='hs-varid'>atomicModifyIORef</span> <span class='hs-varid'>hitTestCache</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>mp</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>flip</span> <span class='hs-conid'>(,)</span> <span class='hs-conid'>()</span> <span class='hs-varop'>$</span>
<a name="line-93"></a> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insertWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res2</span><span class='hs-layout'>)</span> <span class='hs-varid'>kfrom</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res2</span><span class='hs-layout'>)</span> <span class='hs-varid'>mp</span>
<a name="line-94"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>res2</span>
<a name="line-95"></a>
<a name="line-96"></a>
<a name="line-97"></a><a name="Res"></a><span class='hs-comment'>-- need to classify each item as one of the following</span>
<a name="line-98"></a><a name="Res"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Res</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RHit</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>RMiss</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>RFollow</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>RBad</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span><span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-99"></a>
<a name="line-100"></a>
<a name="line-101"></a><a name="toCache"></a><span class='hs-definition'>toCache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>Res</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Cache</span>
<a name="line-102"></a><span class='hs-definition'>toCache</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>f</span> <span class='hs-conid'>RBad</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-103"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Cache</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conid'>RFollow</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conid'>RMiss</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>keysSet</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>res</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="hitTestAdd"></a><span class='hs-definition'>hitTestAdd</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>Res</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>Res</span>
<a name="line-107"></a><span class='hs-definition'>hitTestAdd</span> <span class='hs-varid'>from</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>kfrom</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>sybChildren</span> <span class='hs-varid'>from</span> <span class='hs-keyword'>of</span>
<a name="line-108"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>kfrom</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>res</span>
<a name="line-109"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>kfrom</span> <span class='hs-conid'>RBad</span> <span class='hs-varid'>res</span>
<a name="line-110"></a>
<a name="line-111"></a> <span class='hs-comment'>-- make an inductive hypothesis that this value is a miss</span>
<a name="line-112"></a> <span class='hs-comment'>-- if it turns out you were wrong, start again</span>
<a name="line-113"></a> <span class='hs-comment'>-- uses backtracking, so could be expensive</span>
<a name="line-114"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>kto</span> <span class='hs-varop'>==</span> <span class='hs-varid'>kfrom</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>hitTestAdds</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>kto</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>kfrom</span> <span class='hs-conid'>RHit</span> <span class='hs-varid'>res</span>
<a name="line-115"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>correct</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>res2</span>
<a name="line-116"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>hitTestAdds</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>kto</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>kfrom</span> <span class='hs-conid'>RFollow</span> <span class='hs-varid'>res</span>
<a name="line-117"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>res2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hitTestAdds</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>kto</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>kfrom</span> <span class='hs-conid'>RMiss</span> <span class='hs-varid'>res</span>
<a name="line-118"></a> <span class='hs-varid'>correct</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>all</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-conid'>RMiss</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varid'>res2</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.!</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>dataBoxKey</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-119"></a>
<a name="line-120"></a><a name="hitTestAdds"></a><span class='hs-definition'>hitTestAdds</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DataBox</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>Res</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>Res</span>
<a name="line-121"></a><span class='hs-definition'>hitTestAdds</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>res</span>
<a name="line-122"></a><span class='hs-definition'>hitTestAdds</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hitTestAdds</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>kto</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hitTestAdd</span> <span class='hs-varid'>x</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>res</span>
<a name="line-123"></a>
<a name="line-124"></a>
<a name="line-125"></a><a name="TypeKey"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Int</span>
<a name="line-126"></a>
<a name="line-127"></a><a name="typeKey"></a><span class='hs-definition'>typeKey</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-128"></a><span class='hs-definition'>typeKey</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeRepKey</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeOf</span> <span class='hs-varid'>x</span>
<a name="line-129"></a>
<a name="line-130"></a>
<a name="line-131"></a><a name="DataBox"></a><span class='hs-comment'>-- | An existential box representing a type which supports SYB</span>
<a name="line-132"></a><a name="DataBox"></a><span class='hs-comment'>-- operations.</span>
<a name="line-133"></a><a name="DataBox"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DataBox</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-conid'>Data</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>DataBox</span> <span class='hs-layout'>{</span><span class='hs-varid'>dataBoxKey</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TypeKey</span><span class='hs-layout'>,</span> <span class='hs-varid'>dataBoxVal</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>}</span>
<a name="line-134"></a>
<a name="line-135"></a><a name="dataBox"></a><span class='hs-definition'>dataBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</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-conid'>DataBox</span>
<a name="line-136"></a><span class='hs-definition'>dataBox</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DataBox</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeKey</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-137"></a>
<a name="line-138"></a><a name="sybChildren"></a><span class='hs-comment'>-- return all the possible children of a node</span>
<a name="line-139"></a><span class='hs-comment'>-- if you can't do so, just return Nothing</span>
<a name="line-140"></a><span class='hs-definition'>sybChildren</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DataBox</span><span class='hs-keyglyph'>]</span>
<a name="line-141"></a><span class='hs-definition'>sybChildren</span> <span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>k</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>k</span> <span class='hs-varop'>==</span> <span class='hs-varid'>typeRational</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dataBox</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integer</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-143"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isAlgType</span> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ctrs</span>
<a name="line-144"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNorepType</span> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-145"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span>
<a name="line-146"></a> <span class='hs-keyword'>where</span>
<a name="line-147"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>ctr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gmapQ</span> <span class='hs-varid'>dataBox</span> <span class='hs-layout'>(</span><span class='hs-varid'>asTypeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromConstr</span> <span class='hs-varid'>ctr</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-148"></a> <span class='hs-varid'>ctrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dataTypeConstrs</span> <span class='hs-varid'>dtyp</span>
<a name="line-149"></a> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dataTypeOf</span> <span class='hs-varid'>x</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="typeRational"></a><span class='hs-definition'>typeRational</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span><span class='hs-layout'>)</span>
<a name="line-152"></a>
<a name="line-153"></a><span class='hs-cpp'>#else</span>
<a name="line-154"></a>
<a name="line-155"></a><span class='hs-definition'>hitTest</span> <span class='hs-varid'>from</span> <span class='hs-varid'>to</span> <span class='hs-keyglyph'>=</span>
<a name="line-156"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>kto</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>to</span>
<a name="line-157"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>readCacheFollower</span> <span class='hs-layout'>(</span><span class='hs-varid'>dataBox</span> <span class='hs-varid'>from</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>of</span>
<a name="line-158"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Oracle</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>on</span> <span class='hs-varop'>==</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Hit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>on</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Follow</span>
<a name="line-159"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>test</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Oracle</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>kon</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-varid'>on</span> <span class='hs-keyword'>in</span>
<a name="line-160"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>kon</span> <span class='hs-varop'>==</span> <span class='hs-varid'>kto</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Hit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>on</span>
<a name="line-161"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>test</span> <span class='hs-varid'>kon</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Follow</span>
<a name="line-162"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Miss</span>
<a name="line-163"></a>
<a name="line-164"></a>
<a name="line-165"></a>
<a name="line-166"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-167"></a><span class='hs-comment'>-- CACHE</span>
<a name="line-168"></a><span class='hs-comment'>-- Store and compute the Follower and HitMap</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="Cache"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Cache</span> <span class='hs-conid'>HitMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Follower</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="cache"></a><span class='hs-comment'>-- Indexed by the @from@ type, then the @to@ type</span>
<a name="line-173"></a><span class='hs-comment'>-- Nothing means that we can't perform the trick on the set</span>
<a name="line-174"></a><span class='hs-comment'>{-# NOINLINE cache #-}</span>
<a name="line-175"></a><span class='hs-definition'>cache</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-conid'>Cache</span>
<a name="line-176"></a><span class='hs-definition'>cache</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newIORef</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Cache</span> <span class='hs-varid'>emptyHitMap</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-177"></a>
<a name="line-178"></a>
<a name="line-179"></a><a name="readCacheFollower"></a><span class='hs-definition'>readCacheFollower</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Follower</span>
<a name="line-180"></a><span class='hs-definition'>readCacheFollower</span> <span class='hs-varid'>from</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>vfrom</span><span class='hs-layout'>)</span> <span class='hs-varid'>kto</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-181"></a> <span class='hs-conid'>Cache</span> <span class='hs-varid'>hit</span> <span class='hs-varid'>follow</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>cache</span>
<a name="line-182"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookup2</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>follow</span> <span class='hs-keyword'>of</span>
<a name="line-183"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>ans</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>ans</span>
<a name="line-184"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-185"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>insertHitMap</span> <span class='hs-varid'>from</span> <span class='hs-varid'>hit</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-186"></a> <span class='hs-layout'>(</span><span class='hs-varid'>hit</span><span class='hs-layout'>,</span><span class='hs-varid'>fol</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-187"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>hit</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-188"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>hit</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>hit</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>follower</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>hit</span><span class='hs-layout'>)</span>
<a name="line-189"></a> <span class='hs-comment'>-- -- uncomment these lines to see where type search fails</span>
<a name="line-190"></a> <span class='hs-comment'>-- if isNothing fol then print ("failure",show (typeOf vfrom),kfrom,kto) else return ()</span>
<a name="line-191"></a>
<a name="line-192"></a> <span class='hs-varid'>atomicModifyIORef</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>follow</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-varid'>hit</span> <span class='hs-layout'>(</span><span class='hs-varid'>insert2</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>kto</span> <span class='hs-varid'>fol</span> <span class='hs-varid'>follow</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-193"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>fol</span>
<a name="line-194"></a>
<a name="line-195"></a>
<a name="line-196"></a><a name="readCacheHitMap"></a><span class='hs-comment'>-- from which values, what can you reach</span>
<a name="line-197"></a><span class='hs-definition'>readCacheHitMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>HitMap</span>
<a name="line-198"></a><span class='hs-definition'>readCacheHitMap</span> <span class='hs-varid'>from</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>vfrom</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-199"></a> <span class='hs-conid'>Cache</span> <span class='hs-varid'>hit</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>cache</span>
<a name="line-200"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>kfrom</span> <span class='hs-varid'>hit</span> <span class='hs-keyword'>of</span>
<a name="line-201"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>hit</span>
<a name="line-202"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-203"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-varid'>catch</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>$!</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>insertHitMap</span> <span class='hs-varid'>from</span> <span class='hs-varid'>hit</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-204"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-205"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-206"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>hit</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-207"></a> <span class='hs-varid'>atomicModifyIORef</span> <span class='hs-varid'>cache</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>follow</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Cache</span> <span class='hs-varid'>hit</span> <span class='hs-varid'>follow</span><span class='hs-layout'>,</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-208"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>hit</span>
<a name="line-209"></a>
<a name="line-210"></a>
<a name="line-211"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-212"></a><span class='hs-comment'>-- INTMAP2</span>
<a name="line-213"></a>
<a name="line-214"></a><a name="IntMap2"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>IntMap2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-215"></a>
<a name="line-216"></a><a name="lookup2"></a><span class='hs-definition'>lookup2</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'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>x</span>
<a name="line-217"></a><span class='hs-definition'>lookup2</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>x</span> <span class='hs-varid'>mp</span> <span class='hs-varop'>>>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>y</span>
<a name="line-218"></a>
<a name="line-219"></a><a name="insert2"></a><span class='hs-definition'>insert2</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-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-220"></a><span class='hs-definition'>insert2</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>v</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insertWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>y</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>y</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varid'>mp</span>
<a name="line-221"></a>
<a name="line-222"></a>
<a name="line-223"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-224"></a><span class='hs-comment'>-- FOLLOWER</span>
<a name="line-225"></a><span class='hs-comment'>-- Function to test if you should follow</span>
<a name="line-226"></a>
<a name="line-227"></a><a name="Follower"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Follower</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-228"></a>
<a name="line-229"></a>
<a name="line-230"></a><a name="follower"></a><span class='hs-comment'>-- HitMap must have addHitMap on the key</span>
<a name="line-231"></a><span class='hs-definition'>follower</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HitMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Follower</span>
<a name="line-232"></a><span class='hs-definition'>follower</span> <span class='hs-varid'>from</span> <span class='hs-varid'>to</span> <span class='hs-varid'>mp</span>
<a name="line-233"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>hit</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-conid'>False</span>
<a name="line-234"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>miss</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-conid'>True</span>
<a name="line-235"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>now</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>now</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>hit</span>
<a name="line-236"></a> <span class='hs-keyword'>where</span>
<a name="line-237"></a> <span class='hs-layout'>(</span><span class='hs-varid'>hit</span><span class='hs-layout'>,</span><span class='hs-varid'>miss</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>partition</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>to</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>grab</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>from</span> <span class='hs-varop'>$</span> <span class='hs-varid'>grab</span> <span class='hs-varid'>from</span><span class='hs-layout'>)</span>
<a name="line-238"></a> <span class='hs-varid'>grab</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>findWithDefault</span> <span class='hs-layout'>(</span><span class='hs-varid'>error</span> <span class='hs-str'>"couldn't grab in follower"</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-varid'>mp</span>
<a name="line-239"></a>
<a name="line-240"></a>
<a name="line-241"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-242"></a><span class='hs-comment'>-- DATA/TYPEABLE OPERATIONS</span>
<a name="line-243"></a>
<a name="line-244"></a><a name="TypeKey"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>TypeKey</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Int</span>
<a name="line-245"></a>
<a name="line-246"></a><span class='hs-definition'>typeKey</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Typeable</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-conid'>Int</span>
<a name="line-247"></a><span class='hs-definition'>typeKey</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inlinePerformIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeRepKey</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeOf</span> <span class='hs-varid'>x</span>
<a name="line-248"></a>
<a name="line-249"></a>
<a name="line-250"></a><a name="DataBox"></a><span class='hs-comment'>-- | An existential box representing a type which supports SYB</span>
<a name="line-251"></a><a name="DataBox"></a><span class='hs-comment'>-- operations.</span>
<a name="line-252"></a><a name="DataBox"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>DataBox</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-conid'>Data</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>DataBox</span> <span class='hs-layout'>{</span><span class='hs-varid'>dataBoxKey</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TypeKey</span><span class='hs-layout'>,</span> <span class='hs-varid'>dataBoxVal</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>}</span>
<a name="line-253"></a>
<a name="line-254"></a><span class='hs-definition'>dataBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</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-conid'>DataBox</span>
<a name="line-255"></a><span class='hs-definition'>dataBox</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DataBox</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeKey</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-256"></a>
<a name="line-257"></a>
<a name="line-258"></a><span class='hs-comment'>-- NOTE: This function is partial, but all exceptions are caught later on</span>
<a name="line-259"></a><span class='hs-definition'>sybChildren</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</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-conid'>DataBox</span><span class='hs-keyglyph'>]</span>
<a name="line-260"></a><span class='hs-definition'>sybChildren</span> <span class='hs-varid'>x</span>
<a name="line-261"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isAlgType</span> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ctrs</span>
<a name="line-262"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNorepType</span> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"sybChildren on NorepType"</span>
<a name="line-263"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-264"></a> <span class='hs-keyword'>where</span>
<a name="line-265"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>ctr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gmapQ</span> <span class='hs-varid'>dataBox</span> <span class='hs-layout'>(</span><span class='hs-varid'>asTypeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromConstr</span> <span class='hs-varid'>ctr</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-266"></a> <span class='hs-varid'>ctrs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dataTypeConstrs</span> <span class='hs-varid'>dtyp</span>
<a name="line-267"></a> <span class='hs-varid'>dtyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dataTypeOf</span> <span class='hs-varid'>x</span>
<a name="line-268"></a>
<a name="line-269"></a>
<a name="line-270"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-271"></a><span class='hs-comment'>-- HITMAP</span>
<a name="line-272"></a><span class='hs-comment'>-- What is the transitive closure of a type key</span>
<a name="line-273"></a>
<a name="line-274"></a><a name="HitMap"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>HitMap</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span> <span class='hs-conid'>IntSet</span>
<a name="line-275"></a>
<a name="line-276"></a><a name="emptyHitMap"></a><span class='hs-definition'>emptyHitMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HitMap</span>
<a name="line-277"></a><span class='hs-definition'>emptyHitMap</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span>
<a name="line-278"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tRational</span><span class='hs-layout'>,</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>tInteger</span><span class='hs-layout'>)</span>
<a name="line-279"></a> <span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-varid'>tInteger</span><span class='hs-layout'>,</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-280"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>tRational</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rational</span><span class='hs-layout'>)</span>
<a name="line-281"></a> <span class='hs-varid'>tInteger</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeKey</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Integer</span><span class='hs-layout'>)</span>
<a name="line-282"></a>
<a name="line-283"></a>
<a name="line-284"></a><a name="insertHitMap"></a><span class='hs-definition'>insertHitMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HitMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HitMap</span>
<a name="line-285"></a><span class='hs-definition'>insertHitMap</span> <span class='hs-varid'>box</span> <span class='hs-varid'>hit</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fixEq</span> <span class='hs-varid'>trans</span> <span class='hs-layout'>(</span><span class='hs-varid'>populate</span> <span class='hs-varid'>box</span><span class='hs-layout'>)</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>union</span><span class='hs-varop'>`</span> <span class='hs-varid'>hit</span>
<a name="line-286"></a> <span class='hs-keyword'>where</span>
<a name="line-287"></a> <span class='hs-comment'>-- create a fresh box with all the necessary children that aren't in hit</span>
<a name="line-288"></a> <span class='hs-varid'>populate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DataBox</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HitMap</span>
<a name="line-289"></a> <span class='hs-varid'>populate</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span>
<a name="line-290"></a> <span class='hs-keyword'>where</span>
<a name="line-291"></a> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>DataBox</span> <span class='hs-varid'>key</span> <span class='hs-varid'>val</span><span class='hs-layout'>)</span> <span class='hs-varid'>mp</span>
<a name="line-292"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>key</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>hit</span> <span class='hs-varop'>||</span> <span class='hs-varid'>key</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mp</span>
<a name="line-293"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>cs</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>key</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>dataBoxKey</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varid'>mp</span>
<a name="line-294"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sybChildren</span> <span class='hs-varid'>val</span>
<a name="line-295"></a>
<a name="line-296"></a> <span class='hs-varid'>fs</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mp</span>
<a name="line-297"></a> <span class='hs-varid'>fs</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>mp</span><span class='hs-layout'>)</span>
<a name="line-298"></a>
<a name="line-299"></a>
<a name="line-300"></a> <span class='hs-comment'>-- update every one to be the transitive closure</span>
<a name="line-301"></a> <span class='hs-varid'>trans</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HitMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HitMap</span>
<a name="line-302"></a> <span class='hs-varid'>trans</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-varid'>f</span> <span class='hs-varid'>mp</span>
<a name="line-303"></a> <span class='hs-keyword'>where</span>
<a name="line-304"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>unions</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>map</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>toList</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-305"></a> <span class='hs-varid'>g</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>findWithDefault</span> <span class='hs-layout'>(</span><span class='hs-varid'>hit</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.!</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-varid'>mp</span>
<a name="line-306"></a>
<a name="line-307"></a>
<a name="line-308"></a><a name="fixEq"></a><span class='hs-definition'>fixEq</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</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'>a</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'>a</span>
<a name="line-309"></a><span class='hs-definition'>fixEq</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x2</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>x2</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>fixEq</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x2</span>
<a name="line-310"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>x2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-311"></a>
<a name="line-312"></a>
<a name="line-313"></a><span class='hs-cpp'>#endif</span>
<a name="line-314"></a>
<a name="line-315"></a>
<a name="line-316"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-317"></a><span class='hs-comment'>-- INSTANCE FUNCTIONS</span>
<a name="line-318"></a>
<a name="line-319"></a><a name="C"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>C</span> <span class='hs-varid'>x</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span> <span class='hs-layout'>{</span><span class='hs-varid'>fromC</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CC</span> <span class='hs-varid'>x</span> <span class='hs-varid'>a</span><span class='hs-layout'>}</span>
<a name="line-320"></a>
<a name="line-321"></a><a name="CC"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CC</span> <span class='hs-varid'>x</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Str</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>Str</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-322"></a>
<a name="line-323"></a>
<a name="line-324"></a><a name="biplateData"></a><span class='hs-definition'>biplateData</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span> <span class='hs-varid'>on</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</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-conid'>Answer</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CC</span> <span class='hs-varid'>with</span> <span class='hs-varid'>on</span>
<a name="line-325"></a><span class='hs-definition'>biplateData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-326"></a> <span class='hs-conid'>Hit</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-327"></a> <span class='hs-conid'>Follow</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>uniplateData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>x</span>
<a name="line-328"></a> <span class='hs-conid'>Miss</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Zero</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-329"></a>
<a name="line-330"></a>
<a name="line-331"></a><a name="uniplateData"></a><span class='hs-definition'>uniplateData</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>on</span> <span class='hs-varid'>with</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span> <span class='hs-varid'>on</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</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-conid'>Answer</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CC</span> <span class='hs-varid'>with</span> <span class='hs-varid'>on</span>
<a name="line-332"></a><span class='hs-definition'>uniplateData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>item</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromC</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gfoldl</span> <span class='hs-varid'>combine</span> <span class='hs-varid'>create</span> <span class='hs-varid'>item</span>
<a name="line-333"></a> <span class='hs-keyword'>where</span>
<a name="line-334"></a> <span class='hs-varid'>combine</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>C</span> <span class='hs-varid'>with</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-conid'>C</span> <span class='hs-varid'>with</span> <span class='hs-varid'>b</span>
<a name="line-335"></a> <span class='hs-varid'>combine</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>g</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-keyword'>case</span> <span class='hs-varid'>biplateData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-336"></a> <span class='hs-layout'>(</span><span class='hs-varid'>c2</span><span class='hs-layout'>,</span> <span class='hs-varid'>g2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c</span> <span class='hs-varid'>c2</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c'</span> <span class='hs-varid'>c2'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>g</span> <span class='hs-varid'>c'</span> <span class='hs-layout'>(</span><span class='hs-varid'>g2</span> <span class='hs-varid'>c2'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-337"></a>
<a name="line-338"></a> <span class='hs-varid'>create</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span> <span class='hs-varid'>with</span> <span class='hs-varid'>g</span>
<a name="line-339"></a> <span class='hs-varid'>create</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span> <span class='hs-layout'>(</span><span class='hs-conid'>Zero</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-340"></a>
<a name="line-341"></a>
<a name="line-342"></a><a name="descendData"></a><span class='hs-definition'>descendData</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</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-conid'>Answer</span> <span class='hs-varid'>on</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span>
<a name="line-343"></a><span class='hs-definition'>descendData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>op</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gmapT</span> <span class='hs-layout'>(</span><span class='hs-varid'>descendBiData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>op</span><span class='hs-layout'>)</span>
<a name="line-344"></a>
<a name="line-345"></a><a name="descendBiData"></a><span class='hs-definition'>descendBiData</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Data</span> <span class='hs-varid'>on</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</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-conid'>Answer</span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>with</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>with</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>on</span>
<a name="line-346"></a><span class='hs-definition'>descendBiData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>op</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span>
<a name="line-347"></a> <span class='hs-conid'>Hit</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varop'>$</span> <span class='hs-varid'>op</span> <span class='hs-varid'>y</span>
<a name="line-348"></a> <span class='hs-conid'>Follow</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>gmapT</span> <span class='hs-layout'>(</span><span class='hs-varid'>descendBiData</span> <span class='hs-varid'>oracle</span> <span class='hs-varid'>op</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-349"></a> <span class='hs-conid'>Miss</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span>
<a name="line-350"></a>
<a name="line-351"></a>
<a name="line-352"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-353"></a><span class='hs-comment'>-- FUSION</span>
<a name="line-354"></a>
<a name="line-355"></a><a name="Transformer"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Transformer</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-conid'>Data</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Transformer</span> <span class='hs-conid'>TypeKey</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-356"></a>
<a name="line-357"></a>
<a name="line-358"></a><a name="transformer"></a><span class='hs-comment'>-- | Wrap up a @(a -> a)@ transformation function, to use with 'transformBis'</span>
<a name="line-359"></a><span class='hs-definition'>transformer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>a</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'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Transformer</span>
<a name="line-360"></a><span class='hs-definition'>transformer</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transformer_</span>
<a name="line-361"></a>
<a name="line-362"></a>
<a name="line-363"></a><a name="transformer_"></a><span class='hs-comment'>-- Don't export directly, as don't want Haddock to see the forall</span>
<a name="line-364"></a><span class='hs-definition'>transformer_</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-conid'>Data</span> <span class='hs-varid'>a</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'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Transformer</span>
<a name="line-365"></a><span class='hs-definition'>transformer_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Transformer</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeKey</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-366"></a>
<a name="line-367"></a>
<a name="line-368"></a><a name="transformBis"></a><span class='hs-comment'>-- | Apply a sequence of transformations in order. This function obeys the equivalence:</span>
<a name="line-369"></a><span class='hs-comment'>--</span>
<a name="line-370"></a><span class='hs-comment'>-- > transformBis [[transformer f],[transformer g],...] == transformBi f . transformBi g . ...</span>
<a name="line-371"></a><span class='hs-comment'>--</span>
<a name="line-372"></a><span class='hs-comment'>-- Each item of type @[Transformer]@ is applied in turn, right to left. Within each</span>
<a name="line-373"></a><span class='hs-comment'>-- @[Transformer]@, the individual @Transformer@ values may be interleaved.</span>
<a name="line-374"></a><span class='hs-comment'>--</span>
<a name="line-375"></a><span class='hs-comment'>-- The implementation will attempt to perform fusion, and avoid walking any part of the</span>
<a name="line-376"></a><span class='hs-comment'>-- data structure more than necessary. To further improve performance, you may wish to</span>
<a name="line-377"></a><span class='hs-comment'>-- partially apply the first argument, which will calculate information about the relationship</span>
<a name="line-378"></a><span class='hs-comment'>-- between the transformations.</span>
<a name="line-379"></a><span class='hs-definition'>transformBis</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-conid'>Data</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Transformer</span><span class='hs-keyglyph'>]</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-380"></a><span class='hs-definition'>transformBis</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transformBis_</span>
<a name="line-381"></a>
<a name="line-382"></a>
<a name="line-383"></a><a name="transformBis_"></a><span class='hs-definition'>transformBis_</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-conid'>Data</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Transformer</span><span class='hs-keyglyph'>]</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-384"></a>
<a name="line-385"></a>
<a name="line-386"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 606</span>
<a name="line-387"></a>
<a name="line-388"></a><span class='hs-comment'>-- basic algorithm:</span>
<a name="line-389"></a><span class='hs-comment'>-- as you go down, given transformBis [fN..f1]</span>
<a name="line-390"></a><span class='hs-comment'>-- if x is not in the set reachable by fN..f1, return x</span>
<a name="line-391"></a><span class='hs-comment'>-- if x is in the reachable set, gmap (transformBis [fN..f1]) x</span>
<a name="line-392"></a><span class='hs-comment'>-- if x is one of fN..f1, pick the lowest fi then</span>
<a name="line-393"></a><span class='hs-comment'>-- transformBis [fN..f(i+1)] $ fi $ gmap (transformBis [fi..f1]) x</span>
<a name="line-394"></a>
<a name="line-395"></a><span class='hs-definition'>transformBis_</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isJust</span> <span class='hs-varid'>hitBoxM</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>op</span> <span class='hs-layout'>(</span><span class='hs-varid'>sliceMe</span> <span class='hs-num'>1</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-396"></a> <span class='hs-keyword'>where</span>
<a name="line-397"></a> <span class='hs-varid'>on</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dataBox</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-398"></a> <span class='hs-varid'>hitBoxM</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readCacheHitMap</span> <span class='hs-varid'>on</span>
<a name="line-399"></a> <span class='hs-varid'>hitBox</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromJust</span> <span class='hs-varid'>hitBoxM</span>
<a name="line-400"></a> <span class='hs-varid'>univ</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-layout'>(</span><span class='hs-varid'>dataBoxKey</span> <span class='hs-varid'>on</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>hitBox</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.!</span> <span class='hs-varid'>dataBoxKey</span> <span class='hs-varid'>on</span>
<a name="line-401"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>ts</span>
<a name="line-402"></a>
<a name="line-403"></a> <span class='hs-comment'>-- (a,b), where a < b, and both in range 1..n</span>
<a name="line-404"></a> <span class='hs-varid'>sliceMe</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromMaybe</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lookup2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>slices</span>
<a name="line-405"></a> <span class='hs-varid'>slices</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IntMap2</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Transformer</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-406"></a> <span class='hs-varid'>slices</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromAscList</span>
<a name="line-407"></a> <span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromAscList</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>j</span><span class='hs-layout'>,</span> <span class='hs-varid'>slice</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>j</span><span class='hs-layout'>,</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>i</span><span class='hs-keyglyph'>..</span><span class='hs-varid'>n</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-varid'>tail</span> <span class='hs-varop'>$</span> <span class='hs-varid'>inits</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-408"></a> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>1</span><span class='hs-keyglyph'>..</span><span class='hs-varid'>n</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-varid'>tails</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>ts</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-409"></a>
<a name="line-410"></a> <span class='hs-varid'>slice</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-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Transformer</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Transformer</span><span class='hs-layout'>)</span>
<a name="line-411"></a> <span class='hs-varid'>slice</span> <span class='hs-varid'>from</span> <span class='hs-varid'>to</span> <span class='hs-varid'>tts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>self</span>
<a name="line-412"></a> <span class='hs-keyword'>where</span>
<a name="line-413"></a> <span class='hs-varid'>self</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>from</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>tts</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- FIXME: flattening out here gives different results...</span>
<a name="line-414"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Transformer</span> <span class='hs-varid'>tk</span> <span class='hs-varid'>tr</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>ts</span><span class='hs-layout'>)</span>
<a name="line-415"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>tk</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span><span class='hs-varop'>`</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-varid'>ts</span>
<a name="line-416"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>tk</span> <span class='hs-varid'>t</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>ts</span>
<a name="line-417"></a> <span class='hs-keyword'>where</span>
<a name="line-418"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Transformer</span> <span class='hs-varid'>tk</span> <span class='hs-varop'>$</span> <span class='hs-varid'>op</span> <span class='hs-layout'>(</span><span class='hs-varid'>sliceMe</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>to</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tr</span> <span class='hs-varop'>.</span> <span class='hs-varid'>gmapT</span> <span class='hs-layout'>(</span><span class='hs-varid'>op</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sliceMe</span> <span class='hs-varid'>from</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-419"></a>
<a name="line-420"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>union</span><span class='hs-varop'>`</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromAscList</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapMaybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>g</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>keysSet</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>univ</span><span class='hs-layout'>)</span>
<a name="line-421"></a>
<a name="line-422"></a> <span class='hs-varid'>g</span> <span class='hs-varid'>a</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-423"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-varid'>intersection</span><span class='hs-varop'>`</span> <span class='hs-layout'>(</span><span class='hs-varid'>hitBox</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.!</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-424"></a>
<a name="line-425"></a> <span class='hs-varid'>op</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>b</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Data</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Transformer</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>
<a name="line-426"></a> <span class='hs-varid'>op</span> <span class='hs-varid'>slice</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeKey</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>slice</span> <span class='hs-keyword'>of</span>
<a name="line-427"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>id</span>
<a name="line-428"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>gmapT</span> <span class='hs-layout'>(</span><span class='hs-varid'>op</span> <span class='hs-varid'>slice</span><span class='hs-layout'>)</span>
<a name="line-429"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Transformer</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unsafeCoerce</span> <span class='hs-varop'>.</span> <span class='hs-varid'>t</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unsafeCoerce</span>
<a name="line-430"></a>
<a name="line-431"></a><span class='hs-cpp'>#endif</span>
<a name="line-432"></a>
<a name="line-433"></a>
<a name="line-434"></a><span class='hs-definition'>transformBis_</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-435"></a><span class='hs-definition'>transformBis_</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>transformBis_</span> <span class='hs-varid'>xs</span>
<a name="line-436"></a><span class='hs-definition'>transformBis_</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Transformer</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t</span><span class='hs-conop'>:</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>everywhere</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkT</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>transformBis_</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
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