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<title>src/Darcs/Witnesses/Ordered.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- Copyright (C) 2007 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-keyword'>module</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-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> <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-23"></a> <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-24"></a> <span class='hs-varid'>lengthFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapFL_FL</span><span class='hs-layout'>,</span> <span class='hs-varid'>spanFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldlFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>allFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>anyFL</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-varid'>filterFL</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-varid'>splitAtFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>splitAtRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>bunchFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldlRL</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>lengthRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>isShorterThanRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>mapRL_RL</span><span class='hs-layout'>,</span> <span class='hs-varid'>zipWithFL</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-varid'>filterFLFL</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-varid'>filterRL</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-varid'>reverseFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>reverseRL</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>+>+</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>+<+</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-31"></a> <span class='hs-varid'>nullFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>concatFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>concatRL</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-varid'>consRLSealed</span><span class='hs-layout'>,</span> <span class='hs-varid'>nullRL</span><span class='hs-layout'>,</span> <span class='hs-varid'>toFL</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-varid'>dropWhileFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>dropWhileRL</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>spanFL_M</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-varid'>eqFL</span><span class='hs-layout'>,</span> <span class='hs-varid'>eqFLRev</span><span class='hs-layout'>,</span> <span class='hs-varid'>eqFLUnsafe</span>
<a name="line-36"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-37"></a>
<a name="line-38"></a><span class='hs-cpp'>#include "impossible.h"</span>
<a name="line-39"></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'>Show</span>
<a name="line-40"></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'>FlippedSeal</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>flipSeal</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sealed</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>FreeLeft</span><span class='hs-layout'>,</span> <span class='hs-varid'>unFreeLeft</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-41"></a> <span class='hs-varid'>seal</span> <span class='hs-layout'>)</span>
<a name="line-42"></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-43"></a>
<a name="line-44"></a><span class='hs-keyword'>data</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>a2</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-keyglyph'>=</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</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><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-45"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>1</span> <span class='hs-conop'>:></span>
<a name="line-46"></a><span class='hs-keyword'>data</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>a2</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-keyglyph'>=</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conop'>:<</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</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><span class='hs-layout'>)</span>
<a name="line-47"></a><span class='hs-keyword'>infix</span> <span class='hs-num'>1</span> <span class='hs-conop'>:<</span>
<a name="line-48"></a><span class='hs-keyword'>infix</span> <span class='hs-num'>1</span> <span class='hs-conop'>:/\:</span><span class='hs-layout'>,</span> <span class='hs-conop'>:\/:</span><span class='hs-layout'>,</span> <span class='hs-conop'>:||:</span>
<a name="line-49"></a><span class='hs-keyword'>data</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:\/:</span> <span class='hs-varid'>a2</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-keyglyph'>=</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-conop'>:\/:</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>data</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:/\:</span> <span class='hs-varid'>a2</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-keyglyph'>=</span> <span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</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><span class='hs-layout'>)</span> <span class='hs-conop'>:/\:</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-51"></a><span class='hs-keyword'>data</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:||:</span> <span class='hs-varid'>a2</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-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>a1</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-conop'>:||:</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</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-52"></a>
<a name="line-53"></a><a name="instance%20Show%20(%20(a%20:%3e%20b)%20C(x%20y)%20)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</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'>b</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> <span class='hs-keyword'>where</span>
<a name="line-54"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:></span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showOp2</span> <span class='hs-num'>1</span> <span class='hs-str'>":>"</span> <span class='hs-varid'>d</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="instance%20MyEq%20(a%20:%3e%20b)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MyEq</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-57"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:></span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-varop'>=\/=</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span> <span class='hs-conop'>:></span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>a1</span> <span class='hs-varop'>=\/=</span> <span class='hs-varid'>a2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>b1</span> <span class='hs-varop'>=\/=</span> <span class='hs-varid'>b2</span>
<a name="line-58"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotEq</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="instance%20Eq%20((a%20:%3e%20b)%20C(x%20y))"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</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'>b</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> <span class='hs-keyword'>where</span>
<a name="line-61"></a> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCompare</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="instance%20MyEq%20(a%20:%3c%20b)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MyEq</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-64"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a1</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-varop'>=\/=</span> <span class='hs-layout'>(</span><span class='hs-varid'>a2</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>b1</span> <span class='hs-varop'>=\/=</span> <span class='hs-varid'>b2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a1</span> <span class='hs-varop'>=\/=</span> <span class='hs-varid'>a2</span>
<a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotEq</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="instance%20Eq%20((a%20:%3c%20b)%20C(x%20y))"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</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'>b</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> <span class='hs-keyword'>where</span>
<a name="line-68"></a> <span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCompare</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="instance%20Show2%20(a%20:%3e%20b)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show2</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-71"></a> <span class='hs-varid'>showDict2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="instance%20Show%20(%20(a%20:%5c/:%20b)%20C(x%20y)%20)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</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'>b</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> <span class='hs-keyword'>where</span>
<a name="line-74"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:\/:</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showOp2</span> <span class='hs-num'>9</span> <span class='hs-str'>":\\/:"</span> <span class='hs-varid'>d</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="instance%20Show2%20(a%20:%5c/:%20b)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show2</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:\/:</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-77"></a> <span class='hs-varid'>showDict2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>5</span> <span class='hs-conop'>:>:</span><span class='hs-layout'>,</span> <span class='hs-conop'>:<:</span><span class='hs-layout'>,</span> <span class='hs-varop'>+>+</span><span class='hs-layout'>,</span> <span class='hs-varop'>+<+</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="Show"></a><span class='hs-comment'>-- forward list</span>
<a name="line-82"></a><a name="Show"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyword'>where</span>
<a name="line-83"></a> <span class='hs-layout'>(</span><span class='hs-conop'>:>:</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-84"></a> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="instance%20Show%20(FL%20a%20C(x%20z))"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</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><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-87"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"NilFL"</span>
<a name="line-88"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showParen</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>></span> <span class='hs-varid'>prec</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>showsPrec2</span> <span class='hs-layout'>(</span><span class='hs-varid'>prec</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-varop'>.</span>
<a name="line-89"></a> <span class='hs-varid'>showString</span> <span class='hs-str'>" :>: "</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showsPrec</span> <span class='hs-layout'>(</span><span class='hs-varid'>prec</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-90"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>prec</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>5</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="instance%20Show1%20(FL%20a%20C(x))"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show1</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-93"></a> <span class='hs-varid'>showDict1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="instance%20Show2%20(FL%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show2</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-96"></a> <span class='hs-varid'>showDict2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="instance%20Show%20(RL%20a%20C(x%20z))"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</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><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-99"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"NilRL"</span>
<a name="line-100"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showParen</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>></span> <span class='hs-varid'>prec</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>showsPrec2</span> <span class='hs-layout'>(</span><span class='hs-varid'>prec</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-varop'>.</span>
<a name="line-101"></a> <span class='hs-varid'>showString</span> <span class='hs-str'>" :<: "</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showsPrec</span> <span class='hs-layout'>(</span><span class='hs-varid'>prec</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-102"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>prec</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>5</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="instance%20Show1%20(RL%20a%20C(x))"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show1</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-105"></a> <span class='hs-varid'>showDict1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-106"></a>
<a name="line-107"></a><a name="instance%20Show2%20(RL%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show2</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>showDict2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-109"></a>
<a name="line-110"></a><a name="instance%20Show1%20((a%20:%3e%20b)%20C(x))"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show2</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show2</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show1</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'>b</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-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-111"></a> <span class='hs-varid'>showDict1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ShowDictClass</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="RL"></a><span class='hs-comment'>-- reverse list</span>
<a name="line-114"></a><a name="RL"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyword'>where</span>
<a name="line-115"></a> <span class='hs-layout'>(</span><span class='hs-conop'>:<:</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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'>RL</span> <span class='hs-varid'>a</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-116"></a> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="nullFL"></a><span class='hs-definition'>nullFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-119"></a><span class='hs-definition'>nullFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-120"></a><span class='hs-definition'>nullFL</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-121"></a>
<a name="line-122"></a><a name="nullRL"></a><span class='hs-definition'>nullRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-123"></a><span class='hs-definition'>nullRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-124"></a><span class='hs-definition'>nullRL</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-125"></a>
<a name="line-126"></a><a name="filterFLFL"></a><span class='hs-definition'>filterFLFL</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-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'>EqCheck</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-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'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</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'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-127"></a><span class='hs-definition'>filterFLFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span>
<a name="line-128"></a><span class='hs-definition'>filterFLFL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filterFLFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-129"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>filterFLFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="filterRL"></a><span class='hs-definition'>filterRL</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-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'>RL</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-keyglyph'>[</span><span class='hs-conid'>Sealed2</span> <span class='hs-varid'>p</span><span class='hs-keyglyph'>]</span>
<a name="line-132"></a><span class='hs-definition'>filterRL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-133"></a><span class='hs-definition'>filterRL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Sealed2</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-layout'>(</span><span class='hs-varid'>filterRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filterRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="+%3e+"></a><span class='hs-layout'>(</span><span class='hs-varop'>+>+</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-137"></a><span class='hs-conid'>NilFL</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ys</span>
<a name="line-138"></a><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>ys</span>
<a name="line-139"></a>
<a name="line-140"></a><a name="+%3c+"></a><span class='hs-layout'>(</span><span class='hs-varop'>+<+</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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'>RL</span> <span class='hs-varid'>a</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-141"></a><span class='hs-conid'>NilRL</span> <span class='hs-varop'>+<+</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ys</span>
<a name="line-142"></a><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:<:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varop'>+<+</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>+<+</span> <span class='hs-varid'>ys</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="reverseFL"></a><span class='hs-definition'>reverseFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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-145"></a><span class='hs-definition'>reverseFL</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>xs</span>
<a name="line-146"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>o</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>o</span><span class='hs-layout'>)</span>
<a name="line-147"></a> <span class='hs-varid'>r</span> <span class='hs-varid'>ls</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ls</span>
<a name="line-148"></a> <span class='hs-varid'>r</span> <span class='hs-varid'>ls</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:>:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:<:</span><span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyword'>as</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="reverseRL"></a><span class='hs-definition'>reverseRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-151"></a><span class='hs-definition'>reverseRL</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span> <span class='hs-conid'>NilFL</span> <span class='hs-varid'>xs</span> <span class='hs-comment'>-- r (xs :> NilFL)</span>
<a name="line-152"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>o</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>l</span> <span class='hs-varid'>o</span><span class='hs-layout'>)</span>
<a name="line-153"></a> <span class='hs-varid'>r</span> <span class='hs-varid'>ls</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ls</span>
<a name="line-154"></a> <span class='hs-varid'>r</span> <span class='hs-varid'>ls</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:<:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-keyword'>as</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="concatFL"></a><span class='hs-definition'>concatFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-157"></a><span class='hs-definition'>concatFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span>
<a name="line-158"></a><span class='hs-definition'>concatFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:>:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+>+</span> <span class='hs-varid'>concatFL</span> <span class='hs-keyword'>as</span>
<a name="line-159"></a>
<a name="line-160"></a><a name="concatRL"></a><span class='hs-definition'>concatRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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-161"></a><span class='hs-definition'>concatRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilRL</span>
<a name="line-162"></a><span class='hs-definition'>concatRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-conop'>:<:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+<+</span> <span class='hs-varid'>concatRL</span> <span class='hs-keyword'>as</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="spanFL"></a><span class='hs-definition'>spanFL</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'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</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'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-165"></a><span class='hs-definition'>spanFL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>spanFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-166"></a> <span class='hs-varid'>ys</span> <span class='hs-conop'>:></span> <span class='hs-varid'>zs</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-varid'>zs</span>
<a name="line-167"></a><span class='hs-definition'>spanFL</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span> <span class='hs-conop'>:></span> <span class='hs-varid'>xs</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="spanFL_M"></a><span class='hs-definition'>spanFL_M</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m</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><span class='hs-varop'>.</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span>
<a name="line-170"></a> <span class='hs-layout'>(</span><span class='hs-conid'>FORALL</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</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-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-171"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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><span class='hs-layout'>)</span>
<a name="line-172"></a><span class='hs-definition'>spanFL_M</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-173"></a> <span class='hs-keyword'>do</span>
<a name="line-174"></a> <span class='hs-varid'>continue</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-175"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>continue</span>
<a name="line-176"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>ys</span> <span class='hs-conop'>:></span> <span class='hs-varid'>zs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>spanFL_M</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-177"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-conop'>:></span> <span class='hs-varid'>zs</span>
<a name="line-178"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NilFL</span> <span class='hs-conop'>:></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-179"></a>
<a name="line-180"></a><span class='hs-definition'>spanFL_M</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>NilFL</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NilFL</span> <span class='hs-conop'>:></span> <span class='hs-conid'>NilFL</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="splitAtFL"></a><span class='hs-definition'>splitAtFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>splitAtFL</span> <span class='hs-num'>0</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span> <span class='hs-conop'>:></span> <span class='hs-varid'>xs</span>
<a name="line-184"></a><span class='hs-definition'>splitAtFL</span> <span class='hs-keyword'>_</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-185"></a><span class='hs-definition'>splitAtFL</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitAtFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-186"></a> <span class='hs-layout'>(</span><span class='hs-varid'>xs'</span><span class='hs-conop'>:></span><span class='hs-varid'>xs''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>xs''</span><span class='hs-layout'>)</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="splitAtRL"></a><span class='hs-definition'>splitAtRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:<</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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-189"></a><span class='hs-definition'>splitAtRL</span> <span class='hs-num'>0</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilRL</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>xs</span>
<a name="line-190"></a><span class='hs-definition'>splitAtRL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilRL</span> <span class='hs-conop'>:<</span> <span class='hs-conid'>NilRL</span>
<a name="line-191"></a><span class='hs-definition'>splitAtRL</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:<:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitAtRL</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-192"></a> <span class='hs-layout'>(</span><span class='hs-varid'>xs'</span><span class='hs-conop'>:<</span><span class='hs-varid'>xs''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:<:</span><span class='hs-varid'>xs'</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>xs''</span><span class='hs-layout'>)</span>
<a name="line-193"></a>
<a name="line-194"></a><span class='hs-comment'>-- 'bunchFL n' groups patches into batches of n, except that it always puts</span>
<a name="line-195"></a><span class='hs-comment'>-- the first patch in its own group, this being a recognition that the</span>
<a name="line-196"></a><span class='hs-comment'>-- first patch is often *very* large.</span>
<a name="line-197"></a>
<a name="line-198"></a><a name="bunchFL"></a><span class='hs-definition'>bunchFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-199"></a><span class='hs-definition'>bunchFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span>
<a name="line-200"></a><span class='hs-definition'>bunchFL</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:>:</span> <span class='hs-conid'>NilFL</span><span class='hs-layout'>)</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>bFL</span> <span class='hs-varid'>xs</span>
<a name="line-201"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>bFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-202"></a> <span class='hs-varid'>bFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span>
<a name="line-203"></a> <span class='hs-varid'>bFL</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitAtFL</span> <span class='hs-varid'>n</span> <span class='hs-varid'>bs</span> <span class='hs-keyword'>of</span>
<a name="line-204"></a> <span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>bFL</span> <span class='hs-varid'>b</span>
<a name="line-205"></a>
<a name="line-206"></a>
<a name="line-207"></a><a name="allFL"></a><span class='hs-definition'>allFL</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-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-208"></a><span class='hs-definition'>allFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>and</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mapFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-209"></a>
<a name="line-210"></a><a name="anyFL"></a><span class='hs-definition'>anyFL</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-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-211"></a><span class='hs-definition'>anyFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>or</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mapFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-212"></a>
<a name="line-213"></a><a name="foldlFL"></a><span class='hs-definition'>foldlFL</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'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>b</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> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-214"></a><span class='hs-definition'>foldlFL</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-215"></a><span class='hs-definition'>foldlFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlFL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>ys</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="foldlRL"></a><span class='hs-definition'>foldlRL</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'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>b</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> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-218"></a><span class='hs-definition'>foldlRL</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-219"></a><span class='hs-definition'>foldlRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:<:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlRL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>ys</span>
<a name="line-220"></a>
<a name="line-221"></a><a name="mapFL_FL"></a><span class='hs-definition'>mapFL_FL</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'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</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'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>b</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-222"></a><span class='hs-definition'>mapFL_FL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilFL</span>
<a name="line-223"></a><span class='hs-definition'>mapFL_FL</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-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>mapFL_FL</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span>
<a name="line-224"></a>
<a name="line-225"></a><a name="zipWithFL"></a><span class='hs-definition'>zipWithFL</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-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</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-226"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>p</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>q</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-227"></a><span class='hs-definition'>zipWithFL</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>zipWithFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-228"></a><span class='hs-definition'>zipWithFL</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-conid'>NilFL</span>
<a name="line-229"></a><span class='hs-definition'>zipWithFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bug</span> <span class='hs-str'>"zipWithFL called with too short a list"</span>
<a name="line-230"></a>
<a name="line-231"></a><a name="mapRL_RL"></a><span class='hs-definition'>mapRL_RL</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'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</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'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>b</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-232"></a><span class='hs-definition'>mapRL_RL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NilRL</span>
<a name="line-233"></a><span class='hs-definition'>mapRL_RL</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-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:<:</span> <span class='hs-varid'>mapRL_RL</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span>
<a name="line-234"></a>
<a name="line-235"></a><a name="mapFL"></a><span class='hs-definition'>mapFL</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'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span>
<a name="line-236"></a><span class='hs-definition'>mapFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-237"></a><span class='hs-definition'>mapFL</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'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:</span> <span class='hs-varid'>mapFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-238"></a>
<a name="line-239"></a><a name="filterFL"></a><span class='hs-definition'>filterFL</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-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Sealed2</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-240"></a><span class='hs-definition'>filterFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-241"></a><span class='hs-definition'>filterFL</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'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span>
<a name="line-242"></a> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sealed2</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-layout'>(</span><span class='hs-varid'>filterFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-243"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>filterFL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="mapRL"></a><span class='hs-definition'>mapRL</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'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>w</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span>
<a name="line-246"></a><span class='hs-definition'>mapRL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-247"></a><span class='hs-definition'>mapRL</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'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:</span> <span class='hs-varid'>mapRL</span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-248"></a>
<a name="line-249"></a><a name="lengthFL"></a><span class='hs-definition'>lengthFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-250"></a><span class='hs-definition'>lengthFL</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <span class='hs-varid'>xs</span> <span class='hs-num'>0</span>
<a name="line-251"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-252"></a> <span class='hs-varid'>l</span> <span class='hs-conid'>NilFL</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span>
<a name="line-253"></a> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:>:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>as</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span>
<a name="line-254"></a>
<a name="line-255"></a><a name="lengthRL"></a><span class='hs-definition'>lengthRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-256"></a><span class='hs-definition'>lengthRL</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <span class='hs-varid'>xs</span> <span class='hs-num'>0</span>
<a name="line-257"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-258"></a> <span class='hs-varid'>l</span> <span class='hs-conid'>NilRL</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span>
<a name="line-259"></a> <span class='hs-varid'>l</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:<:</span><span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>as</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>n</span><span class='hs-varop'>+</span><span class='hs-num'>1</span>
<a name="line-260"></a>
<a name="line-261"></a><a name="isShorterThanRL"></a><span class='hs-definition'>isShorterThanRL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RL</span> <span class='hs-varid'>a</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'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-262"></a><span class='hs-definition'>isShorterThanRL</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'><=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-263"></a><span class='hs-definition'>isShorterThanRL</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-264"></a><span class='hs-definition'>isShorterThanRL</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:<:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isShorterThanRL</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-265"></a>
<a name="line-266"></a><a name="consRLSealed"></a><span class='hs-definition'>consRLSealed</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FlippedSeal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FlippedSeal</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-267"></a><span class='hs-definition'>consRLSealed</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>FlippedSeal</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flipSeal</span> <span class='hs-varop'>$</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:<:</span> <span class='hs-keyword'>as</span>
<a name="line-268"></a>
<a name="line-269"></a><a name="toFL"></a><span class='hs-definition'>toFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FreeLeft</span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-270"></a><span class='hs-definition'>toFL</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Sealed</span> <span class='hs-conid'>NilFL</span>
<a name="line-271"></a><span class='hs-definition'>toFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>unFreeLeft</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>toFL</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span> <span class='hs-conid'>Sealed</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-conop'>:>:</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-272"></a>
<a name="line-273"></a><a name="dropWhileFL"></a><span class='hs-definition'>dropWhileFL</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-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FlippedSeal</span> <span class='hs-layout'>(</span><span class='hs-conid'>FL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-274"></a><span class='hs-definition'>dropWhileFL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flipSeal</span> <span class='hs-conid'>NilFL</span>
<a name="line-275"></a><span class='hs-definition'>dropWhileFL</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs'</span><span class='hs-layout'>)</span>
<a name="line-276"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhileFL</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs'</span>
<a name="line-277"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flipSeal</span> <span class='hs-varid'>xs</span>
<a name="line-278"></a>
<a name="line-279"></a><a name="dropWhileRL"></a><span class='hs-definition'>dropWhileRL</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-varid'>a</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'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Sealed</span> <span class='hs-layout'>(</span><span class='hs-conid'>RL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-280"></a><span class='hs-definition'>dropWhileRL</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NilRL</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seal</span> <span class='hs-conid'>NilRL</span>
<a name="line-281"></a><span class='hs-definition'>dropWhileRL</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:<:</span><span class='hs-varid'>xs'</span><span class='hs-layout'>)</span>
<a name="line-282"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>p</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dropWhileRL</span> <span class='hs-varid'>p</span> <span class='hs-varid'>xs'</span>
<a name="line-283"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>seal</span> <span class='hs-varid'>xs</span>
<a name="line-284"></a>
<a name="line-285"></a><a name="eqFL"></a><span class='hs-comment'>-- |Check that two 'FL's are equal element by element.</span>
<a name="line-286"></a><span class='hs-comment'>-- This differs from the 'MyEq' instance for 'FL' which</span>
<a name="line-287"></a><span class='hs-comment'>-- uses commutation.</span>
<a name="line-288"></a><span class='hs-definition'>eqFL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-varid'>a</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> <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-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-289"></a><span class='hs-definition'>eqFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IsEq</span>
<a name="line-290"></a><span class='hs-definition'>eqFL</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>x</span> <span class='hs-varop'>=\/=</span> <span class='hs-varid'>y</span><span class='hs-layout'>,</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>eqFL</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IsEq</span>
<a name="line-291"></a><span class='hs-definition'>eqFL</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotEq</span>
<a name="line-292"></a>
<a name="line-293"></a><a name="eqFLRev"></a><span class='hs-definition'>eqFLRev</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>y</span> <span class='hs-varid'>z</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-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-294"></a><span class='hs-definition'>eqFLRev</span> <span class='hs-conid'>NilFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IsEq</span>
<a name="line-295"></a><span class='hs-definition'>eqFLRev</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>eqFLRev</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span><span class='hs-layout'>,</span> <span class='hs-conid'>IsEq</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>x</span> <span class='hs-varop'>=/\=</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IsEq</span>
<a name="line-296"></a><span class='hs-definition'>eqFLRev</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotEq</span>
<a name="line-297"></a>
<a name="line-298"></a><a name="eqFLUnsafe"></a><span class='hs-definition'>eqFLUnsafe</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MyEq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FL</span> <span class='hs-varid'>a</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'>FL</span> <span class='hs-varid'>a</span> <span class='hs-conid'>C</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-299"></a><span class='hs-definition'>eqFLUnsafe</span> <span class='hs-conid'>NilFL</span> <span class='hs-conid'>NilFL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-300"></a><span class='hs-definition'>eqFLUnsafe</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>y</span><span class='hs-conop'>:>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafeCompare</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqFLUnsafe</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-301"></a><span class='hs-definition'>eqFLUnsafe</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
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