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<title>src/Darcs/Patch/V1/Read.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-warn-orphans #-}</span>
<a name="line-2"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>V1</span><span class='hs-varop'>.</span><span class='hs-conid'>Read</span> <span class='hs-conid'>()</span> <span class='hs-keyword'>where</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>Invert</span> <span class='hs-layout'>(</span> <span class='hs-varid'>invert</span> <span class='hs-layout'>)</span>
<a name="line-5"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>Prim</span> <span class='hs-layout'>(</span> <span class='hs-conid'>PrimPatch</span> <span class='hs-layout'>)</span>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>Read</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ReadPatch</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>ReadMonads</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ParserM</span><span class='hs-layout'>,</span> <span class='hs-varid'>choice</span><span class='hs-layout'>,</span> <span class='hs-varid'>string</span><span class='hs-layout'>,</span>
<a name="line-8"></a> <span class='hs-varid'>lexChar</span><span class='hs-layout'>,</span> <span class='hs-varid'>myLex'</span><span class='hs-layout'>,</span> <span class='hs-varid'>skipSpace</span> <span class='hs-layout'>)</span>
<a name="line-9"></a>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>V1</span><span class='hs-varop'>.</span><span class='hs-conid'>Core</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Patch</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span><span class='hs-varop'>.</span><span class='hs-conid'>V1</span><span class='hs-varop'>.</span><span class='hs-conid'>Commute</span> <span class='hs-layout'>(</span> <span class='hs-varid'>merger</span> <span class='hs-layout'>)</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Sealed</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>seal</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapSeal</span> <span class='hs-layout'>)</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-layout'>)</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span> <span class='hs-varid'>liftM</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'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Char8</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BC</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unpack</span><span class='hs-layout'>,</span> <span class='hs-varid'>pack</span> <span class='hs-layout'>)</span>
<a name="line-18"></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'>ByteString</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>B</span> <span class='hs-layout'>(</span><span class='hs-conid'>ByteString</span> <span class='hs-layout'>)</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-cpp'>#include "gadts.h"</span>
<a name="line-21"></a>
<a name="line-22"></a><a name="instance%20ReadPatch%20(Patch%20prim)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>PrimPatch</span> <span class='hs-varid'>prim</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ReadPatch</span> <span class='hs-layout'>(</span><span class='hs-conid'>Patch</span> <span class='hs-varid'>prim</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a> <span class='hs-varid'>readPatch'</span>
<a name="line-24"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>choice</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>seal</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipSpace</span> <span class='hs-varop'>>></span> <span class='hs-varid'>readMerger</span> <span class='hs-conid'>True</span>
<a name="line-25"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>seal</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipSpace</span> <span class='hs-varop'>>></span> <span class='hs-varid'>readMerger</span> <span class='hs-conid'>False</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapSeal</span> <span class='hs-conid'>PP</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readPatch'</span>
<a name="line-27"></a> <span class='hs-keyglyph'>]</span>
<a name="line-28"></a><a name="readMerger"></a><span class='hs-definition'>readMerger</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>ParserM</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>PrimPatch</span> <span class='hs-varid'>prim</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Patch</span> <span class='hs-varid'>prim</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-definition'>readMerger</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>string</span> <span class='hs-varid'>s</span>
<a name="line-30"></a> <span class='hs-varid'>g</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>myLex'</span>
<a name="line-31"></a> <span class='hs-varid'>lexChar</span> <span class='hs-chr'>'('</span>
<a name="line-32"></a> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>p1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readPatch'</span>
<a name="line-33"></a> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>p2</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readPatch'</span>
<a name="line-34"></a> <span class='hs-varid'>lexChar</span> <span class='hs-chr'>')'</span>
<a name="line-35"></a> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>merger</span> <span class='hs-layout'>(</span><span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>unpack</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>p2</span>
<a name="line-36"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-layout'>(</span><span class='hs-varid'>invert</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-37"></a> <span class='hs-keyword'>where</span>
<a name="line-38"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>merger'</span>
<a name="line-39"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>regrem</span>
<a name="line-40"></a>
<a name="line-41"></a><a name="merger'"></a><span class='hs-definition'>merger'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-42"></a><span class='hs-definition'>merger'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-str'>"merger"</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="regrem"></a><span class='hs-definition'>regrem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-45"></a><span class='hs-definition'>regrem</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BC</span><span class='hs-varop'>.</span><span class='hs-varid'>pack</span> <span class='hs-str'>"regrem"</span>
<a name="line-46"></a>
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