<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ --> <title>src/Darcs/Patch/Repair.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></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'>Repair</span> <a name="line-2"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Repair</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>RepairToFL</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'>mapMaybeSnd</span><span class='hs-layout'>,</span> <span class='hs-conid'>Check</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-3"></a> <span class='hs-keyword'>where</span> <a name="line-4"></a> <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'>Apply</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Apply</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</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'>ApplyMonad</span> <span class='hs-layout'>(</span> <span class='hs-conid'>ApplyMonad</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'>Witnesses</span><span class='hs-varop'>.</span><span class='hs-conid'>Ordered</span> <span class='hs-layout'>(</span> <span class='hs-conid'>FL</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>RL</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'>mapFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapRL</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>+>+</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Printer</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Doc</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'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>catMaybes</span><span class='hs-layout'>,</span> <span class='hs-varid'>listToMaybe</span> <span class='hs-layout'>)</span> <a name="line-11"></a> <a name="line-12"></a><span class='hs-cpp'>#include "gadts.h"</span> <a name="line-13"></a> <a name="line-14"></a><a name="Check"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Check</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>where</span> <a name="line-15"></a> <span class='hs-varid'>isInconsistent</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>p</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-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Doc</span> <a name="line-16"></a> <span class='hs-varid'>isInconsistent</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span> <a name="line-17"></a> <a name="line-18"></a><span class='hs-comment'>-- |'Repair' and 'RepairToFL' deal with repairing old patches that were</span> <a name="line-19"></a><span class='hs-comment'>-- were written out due to bugs or that we no longer wish to support.</span> <a name="line-20"></a><span class='hs-comment'>-- 'Repair' is implemented by collections of patches (FL, Named, PatchInfoAnd) that</span> <a name="line-21"></a><span class='hs-comment'>-- might need repairing.</span> <a name="line-22"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Repair</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>where</span> <a name="line-23"></a> <span class='hs-varid'>applyAndTryToFix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ApplyMonad</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>p</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-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-varid'>p</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><span class='hs-layout'>)</span> <a name="line-24"></a> <a name="line-25"></a><a name="RepairToFL"></a><span class='hs-comment'>-- |'RepairToFL' is implemented by single patches that can be repaired (Prim, Patch, RealPatch)</span> <a name="line-26"></a><a name="RepairToFL"></a><span class='hs-comment'>-- There is a default so that patch types with no current legacy problems don't need to</span> <a name="line-27"></a><a name="RepairToFL"></a><span class='hs-comment'>-- have an implementation.</span> <a name="line-28"></a><a name="RepairToFL"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Apply</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>RepairToFL</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>where</span> <a name="line-29"></a> <span class='hs-varid'>applyAndTryToFixFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ApplyMonad</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>ApplyState</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>p</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-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>p</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><span class='hs-layout'>)</span> <a name="line-30"></a> <span class='hs-varid'>applyAndTryToFixFL</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>apply</span> <span class='hs-varid'>p</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <a name="line-31"></a> <a name="line-32"></a><a name="mapMaybeSnd"></a><span class='hs-definition'>mapMaybeSnd</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <a name="line-33"></a><span class='hs-definition'>mapMaybeSnd</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <a name="line-34"></a><span class='hs-definition'>mapMaybeSnd</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span> <a name="line-35"></a> <a name="line-36"></a><a name="instance%20Check%20(FL%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Check</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Check</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-37"></a> <span class='hs-varid'>isInconsistent</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listToMaybe</span> <span class='hs-varop'>.</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mapFL</span> <span class='hs-varid'>isInconsistent</span> <a name="line-38"></a> <a name="line-39"></a><a name="instance%20Check%20(RL%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Check</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Check</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-40"></a> <span class='hs-varid'>isInconsistent</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listToMaybe</span> <span class='hs-varop'>.</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mapRL</span> <span class='hs-varid'>isInconsistent</span> <a name="line-41"></a> <a name="line-42"></a><a name="instance%20Repair%20(FL%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>RepairToFL</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Repair</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-43"></a> <span class='hs-varid'>applyAndTryToFix</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <a name="line-44"></a> <span class='hs-varid'>applyAndTryToFix</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>mp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyAndTryToFixFL</span> <span class='hs-varid'>p</span> <a name="line-45"></a> <span class='hs-varid'>mps</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyAndTryToFix</span> <span class='hs-varid'>ps</span> <a name="line-46"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>mp</span><span class='hs-layout'>,</span><span class='hs-varid'>mps</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <a name="line-47"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span> <a name="line-48"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>p'</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>p'</span><span class='hs-varop'>+>+</span><span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <a name="line-49"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>ps'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>p</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <a name="line-50"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>p'</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>es</span><span class='hs-layout'>,</span><span class='hs-varid'>ps'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <a name="line-51"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>unlines</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>es</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>p'</span><span class='hs-varop'>+>+</span><span class='hs-varid'>ps'</span><span class='hs-layout'>)</span> <a name="line-52"></a> </pre></body> </html>
