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<title>src/Darcs/Patch/Choices.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- Copyright (C) 2002-2004 David Roundy</span>
<a name="line-2"></a><span class='hs-comment'>--</span>
<a name="line-3"></a><span class='hs-comment'>-- This program is free software; you can redistribute it and/or modify</span>
<a name="line-4"></a><span class='hs-comment'>-- it under the terms of the GNU General Public License as published by</span>
<a name="line-5"></a><span class='hs-comment'>-- the Free Software Foundation; either version 2, or (at your option)</span>
<a name="line-6"></a><span class='hs-comment'>-- any later version.</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- This program is distributed in the hope that it will be useful,</span>
<a name="line-9"></a><span class='hs-comment'>-- but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="line-10"></a><span class='hs-comment'>-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="line-11"></a><span class='hs-comment'>-- GNU General Public License for more details.</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- You should have received a copy of the GNU General Public License</span>
<a name="line-14"></a><span class='hs-comment'>-- along with this program; see the file COPYING. If not, write to</span>
<a name="line-15"></a><span class='hs-comment'>-- the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="line-16"></a><span class='hs-comment'>-- Boston, MA 02110-1301, USA.</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</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><span class='hs-comment'>-- | PatchChoices divides a sequence of patches into three sets: "first",</span>
<a name="line-23"></a><span class='hs-comment'>-- "middle" and "last", such that all patches can be applied, if you first</span>
<a name="line-24"></a><span class='hs-comment'>-- apply the first ones then the middle ones and then the last ones.</span>
<a name="line-25"></a><span class='hs-comment'>-- Obviously if there are dependencies between the patches that will put a</span>
<a name="line-26"></a><span class='hs-comment'>-- constraint on how you can choose to divide them up. The PatchChoices data</span>
<a name="line-27"></a><span class='hs-comment'>-- type and associated functions are here to deal with many of the common</span>
<a name="line-28"></a><span class='hs-comment'>-- cases that come up when choosing a subset of a group of patches.</span>
<a name="line-29"></a><span class='hs-comment'>--</span>
<a name="line-30"></a><span class='hs-comment'>-- 'forceLast' tells PatchChoices that a particular patch is required to be in</span>
<a name="line-31"></a><span class='hs-comment'>-- the "last" group, which also means that any patches that depend on it</span>
<a name="line-32"></a><span class='hs-comment'>-- must be in the "last" group.</span>
<a name="line-33"></a><span class='hs-comment'>--</span>
<a name="line-34"></a><span class='hs-comment'>-- Internally, a PatchChoices doesn't always reorder the patches until</span>
<a name="line-35"></a><span class='hs-comment'>-- it is asked for the final output (e.g. by 'get_first_choice').</span>
<a name="line-36"></a><span class='hs-comment'>-- Instead, each patch is placed in a state of definitely first,</span>
<a name="line-37"></a><span class='hs-comment'>-- definitely last and undecided; undecided leans towards</span>
<a name="line-38"></a><span class='hs-comment'>-- "middle". The patches that are first are commuted to the head</span>
<a name="line-39"></a><span class='hs-comment'>-- immediately, but patches that are middle and last are mixed</span>
<a name="line-40"></a><span class='hs-comment'>-- together. In case you're wondering about the first-middle-last</span>
<a name="line-41"></a><span class='hs-comment'>-- language, it's because in some cases the "yes" answers will be last</span>
<a name="line-42"></a><span class='hs-comment'>-- (as is the case for the revert command), and in others first (as in</span>
<a name="line-43"></a><span class='hs-comment'>-- record, pull and push).</span>
<a name="line-44"></a><span class='hs-comment'>--</span>
<a name="line-45"></a><span class='hs-comment'>-- Some patch marked "middle" may in fact be unselectable because of</span>
<a name="line-46"></a><span class='hs-comment'>-- dependencies: when a patch is marked "last", its dependencies are</span>
<a name="line-47"></a><span class='hs-comment'>-- not updated until patchSlot is called on them.</span>
<a name="line-48"></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'>Choices</span> <span class='hs-layout'>(</span> <span class='hs-conid'>PatchChoices</span><span class='hs-layout'>,</span> <span class='hs-varid'>patchChoices</span><span class='hs-layout'>,</span> <span class='hs-varid'>patchChoicesTps</span><span class='hs-layout'>,</span>
<a name="line-49"></a> <span class='hs-varid'>patchChoicesTpsSub</span><span class='hs-layout'>,</span>
<a name="line-50"></a> <span class='hs-varid'>patchSlot</span><span class='hs-layout'>,</span> <span class='hs-varid'>patchSlot'</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-varid'>getChoices</span><span class='hs-layout'>,</span> <span class='hs-varid'>refineChoices</span><span class='hs-layout'>,</span>
<a name="line-52"></a> <span class='hs-varid'>separateFirstMiddleFromLast</span><span class='hs-layout'>,</span>
<a name="line-53"></a> <span class='hs-varid'>separateFirstFromMiddleLast</span><span class='hs-layout'>,</span>
<a name="line-54"></a> <span class='hs-varid'>forceFirst</span><span class='hs-layout'>,</span> <span class='hs-varid'>forceFirsts</span><span class='hs-layout'>,</span> <span class='hs-varid'>forceLast</span><span class='hs-layout'>,</span> <span class='hs-varid'>forceLasts</span><span class='hs-layout'>,</span>
<a name="line-55"></a> <span class='hs-varid'>forceMatchingFirst</span><span class='hs-layout'>,</span> <span class='hs-varid'>forceMatchingLast</span><span class='hs-layout'>,</span>
<a name="line-56"></a> <span class='hs-varid'>selectAllMiddles</span><span class='hs-layout'>,</span>
<a name="line-57"></a> <span class='hs-varid'>makeUncertain</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeEverythingLater</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeEverythingSooner</span><span class='hs-layout'>,</span>
<a name="line-58"></a> <span class='hs-conid'>TaggedPatch</span><span class='hs-layout'>,</span> <span class='hs-conid'>Tag</span><span class='hs-layout'>,</span> <span class='hs-varid'>tag</span><span class='hs-layout'>,</span> <span class='hs-varid'>tpPatch</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-conid'>Slot</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-60"></a> <span class='hs-varid'>substitute</span>
<a name="line-61"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-62"></a>
<a name="line-63"></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-varop'>.</span><span class='hs-conid'>Identity</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Identity</span> <span class='hs-layout'>)</span>
<a name="line-64"></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-varop'>.</span><span class='hs-conid'>State</span> <span class='hs-layout'>(</span> <span class='hs-conid'>StateT</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-65"></a>
<a name="line-66"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span> <span class='hs-varid'>pred</span> <span class='hs-layout'>)</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Darcs</span><span class='hs-varop'>.</span><span class='hs-conid'>Patch</span>
<a name="line-69"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Patchy</span><span class='hs-layout'>,</span> <span class='hs-varid'>commuteRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>commute</span><span class='hs-layout'>,</span> <span class='hs-varid'>merge</span><span class='hs-layout'>,</span> <span class='hs-varid'>listTouchedFiles</span><span class='hs-layout'>,</span> <span class='hs-varid'>hunkMatches</span>
<a name="line-70"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>invert</span> <span class='hs-layout'>)</span>
<a name="line-71"></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'>Merge</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Merge</span> <span class='hs-layout'>)</span>
<a name="line-72"></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'>Permutations</span> <span class='hs-layout'>(</span> <span class='hs-varid'>commuteWhatWeCanRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>commuteWhatWeCanFL</span> <span class='hs-layout'>)</span>
<a name="line-73"></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'>Patchy</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Invert</span><span class='hs-layout'>,</span> <span class='hs-conid'>Commute</span><span class='hs-layout'>,</span> <span class='hs-conid'>PatchInspect</span> <span class='hs-layout'>)</span>
<a name="line-74"></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'>Eq</span> <span class='hs-layout'>(</span> <span class='hs-conid'>MyEq</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'>EqCheck</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-75"></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-76"></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>
<a name="line-77"></a> <span class='hs-layout'>(</span><span class='hs-conop'>:></span><span class='hs-layout'>)</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conop'>:\/:</span><span class='hs-layout'>)</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conop'>:/\:</span><span class='hs-layout'>)</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conop'>:||:</span><span class='hs-layout'>)</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-78"></a> <span class='hs-varid'>zipWithFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapFL_FL</span><span class='hs-layout'>,</span> <span class='hs-varid'>concatFL</span><span class='hs-layout'>,</span>
<a name="line-79"></a> <span class='hs-layout'>(</span><span class='hs-varop'>+>+</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>reverseRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>anyFL</span> <span class='hs-layout'>)</span>
<a name="line-80"></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'>Sealed2</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-81"></a>
<a name="line-82"></a>
<a name="line-83"></a><span class='hs-cpp'>#include "impossible.h"</span>
<a name="line-84"></a>
<a name="line-85"></a>
<a name="line-86"></a><a name="Tag"></a><span class='hs-comment'>-- | 'TG' @mp i@ acts as a temporary identifier to help us keep track of patches</span>
<a name="line-87"></a><a name="Tag"></a><span class='hs-comment'>-- during the selection process. These are useful for finding patches that</span>
<a name="line-88"></a><a name="Tag"></a><span class='hs-comment'>-- may have moved around during patch selection (being pushed forwards or</span>
<a name="line-89"></a><a name="Tag"></a><span class='hs-comment'>-- backwards as dependencies arise).</span>
<a name="line-90"></a><a name="Tag"></a><span class='hs-comment'>--</span>
<a name="line-91"></a><a name="Tag"></a><span class='hs-comment'>-- The identifier is implemented as a tuple @TG mp i@. The @i@ is just some</span>
<a name="line-92"></a><a name="Tag"></a><span class='hs-comment'>-- arbitrary label, expected to be unique within the patches being</span>
<a name="line-93"></a><a name="Tag"></a><span class='hs-comment'>-- scrutinised. The @mp@ is motivated by patch splitting; it</span>
<a name="line-94"></a><a name="Tag"></a><span class='hs-comment'>-- provides a convenient way to generate a new identifier from the patch</span>
<a name="line-95"></a><a name="Tag"></a><span class='hs-comment'>-- being split. For example, if we split a patch identified as @TG Nothing</span>
<a name="line-96"></a><a name="Tag"></a><span class='hs-comment'>-- 5@, the resulting sub-patches could be identified as @TG (TG Nothing 5)</span>
<a name="line-97"></a><a name="Tag"></a><span class='hs-comment'>-- 1@, @TG (TG Nothing 5) 2@, etc.</span>
<a name="line-98"></a><a name="Tag"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TG</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span><span class='hs-layout'>)</span> <span class='hs-conid'>Integer</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span> <span class='hs-layout'>)</span>
<a name="line-99"></a><a name="TaggedPatch"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>TaggedPatch</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'>TP</span> <span class='hs-conid'>Tag</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>
<a name="line-100"></a>
<a name="line-101"></a><a name="PatchChoice"></a><span class='hs-comment'>-- | The @Bool@ parameter indicates whether the patch has been explicitely</span>
<a name="line-102"></a><a name="PatchChoice"></a><span class='hs-comment'>-- selected (or rejected) by the user.</span>
<a name="line-103"></a><a name="PatchChoice"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PatchChoice</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'>PC</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcPatch</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</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>
<a name="line-104"></a> <span class='hs-layout'>,</span> <span class='hs-sel'>_pcChoice</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>}</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="PatchChoices"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PatchChoices</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-keyword'>where</span>
<a name="line-107"></a> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-108"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PatchChoices</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>
<a name="line-109"></a>
<a name="line-110"></a><a name="Slot"></a><span class='hs-comment'>-- | See module documentation for 'Darcs.Patch.Choices'</span>
<a name="line-111"></a><a name="Slot"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Slot</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InFirst</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InMiddle</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InLast</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="tag"></a><span class='hs-definition'>tag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TaggedPatch</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'>Tag</span>
<a name="line-114"></a><span class='hs-definition'>tag</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>tg</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tg</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="tpPatch"></a><span class='hs-definition'>tpPatch</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TaggedPatch</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'>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>
<a name="line-117"></a><span class='hs-definition'>tpPatch</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>p</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="liftTP"></a><span class='hs-definition'>liftTP</span> <span class='hs-keyglyph'>::</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-keyglyph'>-></span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</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-layout'>(</span><span class='hs-conid'>TaggedPatch</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'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-120"></a><span class='hs-definition'>liftTP</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-121"></a>
<a name="line-122"></a><a name="compareTags"></a><span class='hs-comment'>-- This is dangerous if two patches from different tagged series are compared</span>
<a name="line-123"></a><span class='hs-comment'>-- ideally Tag (and hence TaggedPatch/PatchChoices) would have a witness type</span>
<a name="line-124"></a><span class='hs-comment'>-- to represent the originally tagged sequence.</span>
<a name="line-125"></a><span class='hs-definition'>compareTags</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EqCheck</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</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-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-126"></a><span class='hs-definition'>compareTags</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>t1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t2</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>unsafeCoerceP</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>NotEq</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="instance%20MyEq%20(TaggedPatch%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MyEq</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-129"></a> <span class='hs-varid'>unsafeCompare</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>p1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>unsafeCompare</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>p2</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="instance%20Invert%20(TaggedPatch%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Invert</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Invert</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-132"></a> <span class='hs-varid'>invert</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftTP</span> <span class='hs-varid'>invert</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="instance%20Commute%20(TaggedPatch%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Commute</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Commute</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-135"></a> <span class='hs-varid'>commute</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>p1</span> <span class='hs-conop'>:></span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>p2'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>p1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>commute</span> <span class='hs-layout'>(</span><span class='hs-varid'>p1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-136"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>p2'</span> <span class='hs-conop'>:></span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>p1'</span><span class='hs-layout'>)</span>
<a name="line-137"></a>
<a name="line-138"></a><a name="instance%20PatchInspect%20(TaggedPatch%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>PatchInspect</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchInspect</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-139"></a> <span class='hs-varid'>listTouchedFiles</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listTouchedFiles</span> <span class='hs-varid'>p</span>
<a name="line-140"></a> <span class='hs-varid'>hunkMatches</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hunkMatches</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="instance%20Merge%20(TaggedPatch%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Merge</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Merge</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-143"></a> <span class='hs-varid'>merge</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>p1</span> <span class='hs-conop'>:\/:</span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>merge</span> <span class='hs-layout'>(</span><span class='hs-varid'>p1</span> <span class='hs-conop'>:\/:</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-144"></a> <span class='hs-varid'>p2'</span> <span class='hs-conop'>:/\:</span> <span class='hs-varid'>p1'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>p2'</span> <span class='hs-conop'>:/\:</span> <span class='hs-conid'>TP</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>p1'</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="instance%20Commute%20(PatchChoice%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Commute</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Commute</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-147"></a> <span class='hs-varid'>commute</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>c1</span> <span class='hs-conop'>:></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>p2</span> <span class='hs-varid'>c2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>p2'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>p1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>commute</span> <span class='hs-layout'>(</span><span class='hs-varid'>p1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-148"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>p2'</span> <span class='hs-varid'>c2</span> <span class='hs-conop'>:></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>p1'</span> <span class='hs-varid'>c1</span><span class='hs-layout'>)</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="instance%20PatchInspect%20(PatchChoice%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>PatchInspect</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchInspect</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-varid'>listTouchedFiles</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listTouchedFiles</span> <span class='hs-varid'>p</span>
<a name="line-152"></a> <span class='hs-varid'>hunkMatches</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hunkMatches</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="instance%20Merge%20(PatchChoice%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Merge</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Merge</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-155"></a> <span class='hs-varid'>merge</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp1</span> <span class='hs-varid'>c1</span> <span class='hs-conop'>:\/:</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp2</span> <span class='hs-varid'>c2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>merge</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp1</span> <span class='hs-conop'>:\/:</span> <span class='hs-varid'>tp2</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-156"></a> <span class='hs-varid'>tp2'</span> <span class='hs-conop'>:/\:</span> <span class='hs-varid'>tp1'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp2'</span> <span class='hs-varid'>c2</span> <span class='hs-conop'>:/\:</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp1'</span> <span class='hs-varid'>c1</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="patchChoices"></a><span class='hs-definition'>patchChoices</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></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-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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>
<a name="line-159"></a><span class='hs-definition'>patchChoices</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>.</span> <span class='hs-varid'>patchChoicesTps</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="patchChoicesTpsSub"></a><span class='hs-comment'>-- |Tag a sequence of patches as subpatches of an existing tag. This is intended for</span>
<a name="line-162"></a><span class='hs-comment'>-- use when substituting a patch for an equivalent patch or patches.</span>
<a name="line-163"></a><span class='hs-definition'>patchChoicesTpsSub</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span>
<a name="line-164"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></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>
<a name="line-165"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoices</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-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</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-166"></a><span class='hs-definition'>patchChoicesTpsSub</span> <span class='hs-varid'>tg</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>tps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zipWithFL</span> <span class='hs-conid'>TP</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-conid'>TG</span> <span class='hs-varid'>tg</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>1</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps</span>
<a name="line-167"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-conid'>NilFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varid'>tps</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>tps</span><span class='hs-layout'>)</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="patchChoicesTps"></a><span class='hs-comment'>-- |Tag a sequence of patches.</span>
<a name="line-170"></a><span class='hs-definition'>patchChoicesTps</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></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-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoices</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-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</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-171"></a><span class='hs-definition'>patchChoicesTps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>patchChoicesTpsSub</span> <span class='hs-conid'>Nothing</span>
<a name="line-172"></a>
<a name="line-173"></a><a name="instance%20MyEq%20(PatchChoice%20p)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MyEq</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-174"></a> <span class='hs-varid'>unsafeCompare</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp1</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp2</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCompare</span> <span class='hs-varid'>tp1</span> <span class='hs-varid'>tp2</span>
<a name="line-175"></a>
<a name="line-176"></a>
<a name="line-177"></a><a name="separateFirstFromMiddleLast"></a><span class='hs-definition'>separateFirstFromMiddleLast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchChoices</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'>z</span><span class='hs-layout'>)</span>
<a name="line-178"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-179"></a><span class='hs-definition'>separateFirstFromMiddleLast</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-conop'>:></span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>tp</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-180"></a>
<a name="line-181"></a><a name="separateFirstMiddleFromLast"></a><span class='hs-definition'>separateFirstMiddleFromLast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchChoices</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'>z</span><span class='hs-layout'>)</span>
<a name="line-182"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-183"></a><span class='hs-definition'>separateFirstMiddleFromLast</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-184"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pushLasts</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>of</span>
<a name="line-185"></a> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l'</span>
<a name="line-186"></a>
<a name="line-187"></a><a name="getChoices"></a><span class='hs-comment'>-- | @getChoices@ evaluates a @PatchChoices@ into the first, middle and last sequences</span>
<a name="line-188"></a><span class='hs-comment'>-- by doing the commutes that were needed.</span>
<a name="line-189"></a><span class='hs-definition'>getChoices</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchChoices</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>
<a name="line-190"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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>
<a name="line-191"></a><span class='hs-definition'>getChoices</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-192"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pushLasts</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>of</span>
<a name="line-193"></a> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-conop'>:></span> <span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l'</span>
<a name="line-194"></a>
<a name="line-195"></a><a name="pushLasts"></a><span class='hs-definition'>pushLasts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</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>
<a name="line-196"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</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>
<a name="line-197"></a><span class='hs-definition'>pushLasts</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span> <span class='hs-conop'>:></span> <span class='hs-conid'>NilFL</span>
<a name="line-198"></a><span class='hs-definition'>pushLasts</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>pcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-199"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pushLasts</span> <span class='hs-varid'>pcs</span> <span class='hs-keyword'>of</span>
<a name="line-200"></a> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l</span>
<a name="line-201"></a><span class='hs-definition'>pushLasts</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>pcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-202"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pushLasts</span> <span class='hs-varid'>pcs</span> <span class='hs-keyword'>of</span>
<a name="line-203"></a> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-204"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteWhatWeCanFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:></span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-205"></a> <span class='hs-layout'>(</span><span class='hs-varid'>m'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>tp'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>deps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m'</span> <span class='hs-conop'>:></span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>deps</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="refineChoices"></a><span class='hs-comment'>-- | @refineChoices act@ performs @act@ on the middle part of a sequence</span>
<a name="line-208"></a><span class='hs-comment'>-- of choices, in order to hopefully get more patches into the @first@ and</span>
<a name="line-209"></a><span class='hs-comment'>-- @last@ parts of a @PatchChoices@.</span>
<a name="line-210"></a><span class='hs-definition'>refineChoices</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span>
<a name="line-211"></a> <span class='hs-layout'>(</span><span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>u</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>u</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-212"></a> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>u</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-213"></a> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>u</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-214"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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'>PatchChoices</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>
<a name="line-215"></a><span class='hs-definition'>refineChoices</span> <span class='hs-varid'>act</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span>
<a name="line-216"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>getChoices</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span>
<a name="line-217"></a> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-conop'>:></span> <span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-218"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>mchoices</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCs</span> <span class='hs-conid'>NilFL</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>PC</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>m</span>
<a name="line-219"></a> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>act</span> <span class='hs-varid'>m</span> <span class='hs-varid'>mchoices</span>
<a name="line-220"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>PCs</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>f'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>l'</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>PC</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-221"></a>
<a name="line-222"></a><a name="patchSlot"></a><span class='hs-definition'>patchSlot</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-223"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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-layout'>(</span><span class='hs-conid'>Slot</span><span class='hs-layout'>,</span> <span class='hs-conid'>PatchChoices</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>
<a name="line-224"></a><span class='hs-definition'>patchSlot</span> <span class='hs-layout'>(</span><span class='hs-conid'>TP</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>pc</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-225"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>foundIn</span> <span class='hs-varid'>f</span>
<a name="line-226"></a> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-conid'>InFirst</span><span class='hs-layout'>,</span> <span class='hs-varid'>pc</span><span class='hs-layout'>)</span>
<a name="line-227"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>psLast</span> <span class='hs-varid'>f</span> <span class='hs-conid'>NilRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>l</span>
<a name="line-228"></a> <span class='hs-keyword'>where</span>
<a name="line-229"></a> <span class='hs-varid'>foundIn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>anyFL</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span>
<a name="line-230"></a> <span class='hs-varid'>psLast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>c</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-231"></a> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-232"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-233"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</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-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-234"></a> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-235"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Slot</span><span class='hs-layout'>,</span> <span class='hs-conid'>PatchChoices</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>
<a name="line-236"></a> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span>
<a name="line-237"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>tag</span> <span class='hs-varid'>tp</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>InLast</span>
<a name="line-238"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firsts</span>
<a name="line-239"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>settleM</span> <span class='hs-varid'>middles</span>
<a name="line-240"></a> <span class='hs-varop'>+>+</span> <span class='hs-varid'>settleB</span> <span class='hs-varid'>bubble</span>
<a name="line-241"></a> <span class='hs-varop'>+>+</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-242"></a> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span>
<a name="line-243"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>tag</span> <span class='hs-varid'>tp</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span>
<a name="line-244"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>bubble</span> <span class='hs-conop'>:></span> <span class='hs-varid'>tp</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-245"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>bubble'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>InMiddle</span><span class='hs-layout'>,</span>
<a name="line-246"></a> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firsts</span>
<a name="line-247"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>settleM</span> <span class='hs-varid'>middles</span>
<a name="line-248"></a> <span class='hs-varop'>+>+</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp'</span> <span class='hs-conid'>False</span>
<a name="line-249"></a> <span class='hs-conop'>:>:</span> <span class='hs-varid'>settleB</span> <span class='hs-varid'>bubble'</span>
<a name="line-250"></a> <span class='hs-varop'>+>+</span> <span class='hs-varid'>ls</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-251"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>InLast</span><span class='hs-layout'>,</span>
<a name="line-252"></a> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>firsts</span>
<a name="line-253"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>settleM</span> <span class='hs-varid'>middles</span>
<a name="line-254"></a> <span class='hs-varop'>+>+</span> <span class='hs-varid'>settleB</span> <span class='hs-varid'>bubble</span>
<a name="line-255"></a> <span class='hs-varop'>+>+</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span>
<a name="line-256"></a> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span>
<a name="line-257"></a> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-258"></a> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>bubble</span><span class='hs-layout'>)</span> <span class='hs-varid'>ls</span>
<a name="line-259"></a> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-260"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>bubble</span> <span class='hs-conop'>:></span> <span class='hs-varid'>tp</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-261"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>bubble'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>middles</span><span class='hs-layout'>)</span> <span class='hs-varid'>bubble'</span> <span class='hs-varid'>ls</span>
<a name="line-262"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>psLast</span> <span class='hs-varid'>firsts</span> <span class='hs-varid'>middles</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>bubble</span><span class='hs-layout'>)</span> <span class='hs-varid'>ls</span>
<a name="line-263"></a> <span class='hs-varid'>psLast</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>impossible</span>
<a name="line-264"></a> <span class='hs-varid'>settleM</span> <span class='hs-varid'>middles</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverseRL</span> <span class='hs-varid'>middles</span>
<a name="line-265"></a> <span class='hs-varid'>settleB</span> <span class='hs-varid'>bubble</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverseRL</span> <span class='hs-varid'>bubble</span>
<a name="line-266"></a>
<a name="line-267"></a><a name="patchSlot'"></a><span class='hs-definition'>patchSlot'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span>
<a name="line-268"></a> <span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>StateT</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoices</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-conid'>Identity</span> <span class='hs-conid'>Slot</span>
<a name="line-269"></a><span class='hs-definition'>patchSlot'</span> <span class='hs-varid'>tp</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StateT</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>patchSlot</span> <span class='hs-varid'>tp</span><span class='hs-layout'>)</span>
<a name="line-270"></a>
<a name="line-271"></a><a name="forceMatchingFirst"></a><span class='hs-definition'>forceMatchingFirst</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-varop'>.</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span>
<a name="line-272"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>FORALL</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-conid'>TaggedPatch</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'>Bool</span><span class='hs-layout'>)</span>
<a name="line-273"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-274"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-275"></a><span class='hs-definition'>forceMatchingFirst</span> <span class='hs-varid'>pred</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>fn</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-276"></a> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>fn</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>l</span>
<a name="line-277"></a> <span class='hs-keyword'>where</span>
<a name="line-278"></a> <span class='hs-varid'>fmfLasts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-279"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-280"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-281"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-282"></a> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span>
<a name="line-283"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>pred_pc</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span>
<a name="line-284"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteWhatWeCanRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>l1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-285"></a> <span class='hs-layout'>(</span><span class='hs-varid'>deps</span> <span class='hs-conop'>:></span> <span class='hs-varid'>a'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l1'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-286"></a> <span class='hs-keyword'>let</span>
<a name="line-287"></a> <span class='hs-varid'>f'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>pcPatch</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseRL</span> <span class='hs-varid'>deps</span><span class='hs-layout'>)</span> <span class='hs-varop'>+>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>pcPatch</span> <span class='hs-varid'>a'</span> <span class='hs-conop'>:>:</span> <span class='hs-conid'>NilFL</span><span class='hs-layout'>)</span>
<a name="line-288"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2</span>
<a name="line-289"></a> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>l1</span><span class='hs-layout'>)</span> <span class='hs-varid'>l2</span>
<a name="line-290"></a> <span class='hs-varid'>fmfLasts</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l1</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span>
<a name="line-291"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverseRL</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>}</span>
<a name="line-292"></a> <span class='hs-varid'>pred_pc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FORALL</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-conid'>PatchChoice</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'>Bool</span>
<a name="line-293"></a> <span class='hs-varid'>pred_pc</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>tp</span>
<a name="line-294"></a>
<a name="line-295"></a><a name="forceFirsts"></a><span class='hs-definition'>forceFirsts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-296"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-297"></a><span class='hs-definition'>forceFirsts</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>forceMatchingFirst</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span>
<a name="line-298"></a>
<a name="line-299"></a><a name="forceFirst"></a><span class='hs-definition'>forceFirst</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-300"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-301"></a><span class='hs-definition'>forceFirst</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>forceMatchingFirst</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span>
<a name="line-302"></a><span class='hs-comment'>--TODO: stop after having seen the patch we want to force first</span>
<a name="line-303"></a>
<a name="line-304"></a><a name="selectAllMiddles"></a><span class='hs-definition'>selectAllMiddles</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</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-varop'>.</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Bool</span>
<a name="line-305"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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'>PatchChoices</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>
<a name="line-306"></a><span class='hs-definition'>selectAllMiddles</span> <span class='hs-conid'>True</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>g</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-307"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span>
<a name="line-308"></a><span class='hs-definition'>selectAllMiddles</span> <span class='hs-conid'>False</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>samf</span> <span class='hs-varid'>f</span> <span class='hs-conid'>NilRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>l</span>
<a name="line-309"></a> <span class='hs-keyword'>where</span>
<a name="line-310"></a> <span class='hs-varid'>samf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>m3</span><span class='hs-layout'>)</span>
<a name="line-311"></a> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>m1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-312"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-313"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m2</span> <span class='hs-varid'>m3</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-314"></a> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m3</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-315"></a> <span class='hs-conid'>PatchChoices</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>
<a name="line-316"></a> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-varid'>pc</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-317"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>l1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>pc</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-318"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>l1</span><span class='hs-layout'>)</span> <span class='hs-varid'>l2</span>
<a name="line-319"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp'</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l1'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-varid'>l1'</span> <span class='hs-varid'>l2</span>
<a name="line-320"></a> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <span class='hs-varid'>l1</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>l1</span><span class='hs-layout'>)</span> <span class='hs-varid'>l2</span>
<a name="line-321"></a> <span class='hs-varid'>samf</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <span class='hs-varid'>l1</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCs</span> <span class='hs-layout'>(</span><span class='hs-varid'>f1</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>reverseRL</span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseRL</span> <span class='hs-varid'>l1</span><span class='hs-layout'>)</span>
<a name="line-322"></a>
<a name="line-323"></a><a name="forceMatchingLast"></a><span class='hs-definition'>forceMatchingLast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>FORALL</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-conid'>TaggedPatch</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'>Bool</span><span class='hs-layout'>)</span>
<a name="line-324"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-325"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-326"></a><span class='hs-definition'>forceMatchingLast</span> <span class='hs-varid'>pred</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-327"></a> <span class='hs-varid'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-conid'>True</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span>
<a name="line-328"></a>
<a name="line-329"></a><a name="fmlFirst"></a><span class='hs-definition'>fmlFirst</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span>
<a name="line-330"></a> <span class='hs-layout'>(</span><span class='hs-conid'>FORALL</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-conid'>TaggedPatch</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'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-331"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>m1</span><span class='hs-layout'>)</span>
<a name="line-332"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span>
<a name="line-333"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-334"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-335"></a><span class='hs-definition'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f1</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-336"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span>
<a name="line-337"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteWhatWeCanFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-338"></a> <span class='hs-layout'>(</span><span class='hs-varid'>f2'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>a'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>deps</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-339"></a> <span class='hs-keyword'>let</span>
<a name="line-340"></a> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>a'</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>deps</span><span class='hs-layout'>)</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>l</span>
<a name="line-341"></a> <span class='hs-keyword'>in</span>
<a name="line-342"></a> <span class='hs-varid'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2'</span> <span class='hs-varid'>l'</span>
<a name="line-343"></a><span class='hs-definition'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f1</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>f1</span><span class='hs-layout'>)</span> <span class='hs-varid'>f2</span> <span class='hs-varid'>l</span>
<a name="line-344"></a><span class='hs-definition'>fmlFirst</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>b</span> <span class='hs-varid'>f1</span> <span class='hs-conid'>NilFL</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCs</span> <span class='hs-layout'>{</span> <span class='hs-varid'>pcsFirsts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>reverseRL</span> <span class='hs-varid'>f1</span>
<a name="line-345"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pcsLasts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>ch</span> <span class='hs-varid'>l</span><span class='hs-layout'>}</span>
<a name="line-346"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>ch</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>pred</span> <span class='hs-varid'>tp</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-347"></a>
<a name="line-348"></a><a name="forceLasts"></a><span class='hs-definition'>forceLasts</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span>
<a name="line-349"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-350"></a><span class='hs-definition'>forceLasts</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>forceMatchingLast</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>`elem`</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span>
<a name="line-351"></a>
<a name="line-352"></a><a name="forceLast"></a><span class='hs-definition'>forceLast</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Tag</span>
<a name="line-353"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-354"></a><span class='hs-definition'>forceLast</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>forceMatchingLast</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span>
<a name="line-355"></a>
<a name="line-356"></a><a name="makeUncertain"></a><span class='hs-definition'>makeUncertain</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-357"></a><span class='hs-definition'>makeUncertain</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmlFirst</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-conid'>False</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span>
<a name="line-358"></a>
<a name="line-359"></a><a name="makeEverythingLater"></a><span class='hs-definition'>makeEverythingLater</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchChoices</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'>PatchChoices</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>
<a name="line-360"></a><span class='hs-definition'>makeEverythingLater</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-361"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span>
<a name="line-362"></a> <span class='hs-varid'>l'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-varid'>l</span>
<a name="line-363"></a> <span class='hs-keyword'>in</span>
<a name="line-364"></a> <span class='hs-conid'>PCs</span> <span class='hs-conid'>NilFL</span> <span class='hs-varop'>$</span> <span class='hs-varid'>m</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>l'</span>
<a name="line-365"></a>
<a name="line-366"></a><a name="makeEverythingSooner"></a><span class='hs-definition'>makeEverythingSooner</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</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-varop'>.</span>
<a name="line-367"></a> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PatchChoices</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'>PatchChoices</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>
<a name="line-368"></a><span class='hs-definition'>makeEverythingSooner</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-369"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mes</span> <span class='hs-conid'>NilRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>l</span>
<a name="line-370"></a> <span class='hs-keyword'>of</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conop'>:></span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-371"></a> <span class='hs-conid'>PCs</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>l'</span>
<a name="line-372"></a> <span class='hs-keyword'>where</span>
<a name="line-373"></a> <span class='hs-varid'>mes</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>m3</span><span class='hs-layout'>)</span>
<a name="line-374"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-375"></a> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m2</span> <span class='hs-varid'>m3</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-376"></a> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m3</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-377"></a> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m1</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-378"></a> <span class='hs-varid'>mes</span> <span class='hs-varid'>middle</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>True</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mes</span> <span class='hs-varid'>middle</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>bubble</span><span class='hs-layout'>)</span> <span class='hs-varid'>ls</span>
<a name="line-379"></a> <span class='hs-varid'>mes</span> <span class='hs-varid'>middle</span> <span class='hs-varid'>bubble</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-380"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>commuteRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>bubble</span> <span class='hs-conop'>:></span> <span class='hs-varid'>tp</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-381"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mes</span> <span class='hs-varid'>middle</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>bubble</span><span class='hs-layout'>)</span> <span class='hs-varid'>ls</span>
<a name="line-382"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>bubble'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mes</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp'</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>middle</span><span class='hs-layout'>)</span> <span class='hs-varid'>bubble'</span> <span class='hs-varid'>ls</span>
<a name="line-383"></a> <span class='hs-varid'>mes</span> <span class='hs-varid'>middle</span> <span class='hs-varid'>bubble</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseRL</span> <span class='hs-varid'>middle</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tp</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseRL</span> <span class='hs-varid'>bubble</span><span class='hs-layout'>)</span>
<a name="line-384"></a>
<a name="line-385"></a><a name="substitute"></a><span class='hs-comment'>-- | 'substitute' @(a :||: bs)@ @pcs@ replaces @a@ with @bs@ in @pcs@ preserving the choice</span>
<a name="line-386"></a><span class='hs-comment'>-- associated with @a@</span>
<a name="line-387"></a><span class='hs-definition'>substitute</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</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>
<a name="line-388"></a> <span class='hs-varop'>.</span> <span class='hs-conid'>Patchy</span> <span class='hs-varid'>p</span>
<a name="line-389"></a> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Sealed2</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:||:</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-390"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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>
<a name="line-391"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PatchChoices</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>
<a name="line-392"></a><span class='hs-definition'>substitute</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sealed2</span> <span class='hs-layout'>(</span><span class='hs-varid'>tp</span> <span class='hs-conop'>:||:</span> <span class='hs-varid'>new_tps</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>PCs</span> <span class='hs-varid'>f</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-393"></a> <span class='hs-conid'>PCs</span> <span class='hs-layout'>(</span><span class='hs-varid'>concatFL</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>substTp</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>concatFL</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>substPc</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-394"></a> <span class='hs-keyword'>where</span>
<a name="line-395"></a> <span class='hs-varid'>substTp</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>TaggedPatch</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-396"></a> <span class='hs-varid'>substTp</span> <span class='hs-varid'>tp'</span>
<a name="line-397"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>compareTags</span> <span class='hs-varid'>tp</span> <span class='hs-varid'>tp'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>new_tps</span>
<a name="line-398"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tp'</span> <span class='hs-conop'>:>:</span> <span class='hs-conid'>NilFL</span>
<a name="line-399"></a> <span class='hs-varid'>substPc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatchChoice</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-400"></a> <span class='hs-varid'>substPc</span> <span class='hs-layout'>(</span><span class='hs-conid'>PC</span> <span class='hs-varid'>tp'</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-401"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>compareTags</span> <span class='hs-varid'>tp</span> <span class='hs-varid'>tp'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>new_tps</span>
<a name="line-402"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PC</span> <span class='hs-varid'>tp'</span> <span class='hs-varid'>c</span> <span class='hs-conop'>:>:</span> <span class='hs-conid'>NilFL</span>
</pre></body>
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