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<h3>
Andreas Klebinger pushed to branch wip/andreask/dom-lt-fixes
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3c79585608738906aa44bfb8b4260a0c111e062f">3c795856</a></strong>
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<span>by Andreas Klebinger</span>
<i>at 2020-08-24T15:00:59+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update dominator code with fixes from the dom-lt package.
Two bugs turned out in the package that have been fixed since.
This MR includes this fixes in the GHC port of the code.
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<h4>1 changed file:</h4>
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<a href="#dafe0c717051bfbe491ee2662d7c0e72cf3c0034">
compiler/GHC/CmmToAsm/CFG/Dominators.hs
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<h4>Changes:</h4>
<li id="dafe0c717051bfbe491ee2662d7c0e72cf3c0034">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3c79585608738906aa44bfb8b4260a0c111e062f#dafe0c717051bfbe491ee2662d7c0e72cf3c0034"><strong>compiler/GHC/CmmToAsm/CFG/Dominators.hs</strong></a>
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<pre style="margin: 0;"> <span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE RankNTypes, BangPatterns, FlexibleContexts, Strict #-}</span></span>
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<pre style="margin: 0;"> <span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC3" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- |</span></span>
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<pre style="margin: 0;">-<span id="LC4" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Module : D<span class="idiff left right">ominators</span></span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Module : D<span class="idiff left right">ata.Graph.Dom</span></span></span>
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<pre style="margin: 0;"> <span id="LC5" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Copyright : (c) Matt Morrow 2009</span></span>
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<pre style="margin: 0;"> <span id="LC6" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> License : BSD3</span></span>
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<pre style="margin: 0;">-<span id="LC7" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Maintainer : <<span class="idiff left right">morrow@moonpatio.com</span>></span></span>
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<pre style="margin: 0;">-<span id="LC8" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Stability : <span class="idiff left right">experimental</span></span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Maintainer : <<span class="idiff left right">klebinger.andreas@gmx.at</span>></span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Stability : <span class="idiff left right">stable</span></span></span>
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<pre style="margin: 0;"> <span id="LC9" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Portability : portable</span></span>
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<pre style="margin: 0;"> <span id="LC10" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;">-<span id="LC11" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Taken from the dom-lt package.</span></span>
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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;"> <span id="LC11" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> The Lengauer-Tarjan graph dominators algorithm.</span></span>
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> \[1\] Lengauer, Tarjan,</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -22,7 +20,11 @@</td>
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<pre style="margin: 0;"> <span id="LC20" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> /Interference Graphs for Procedures in Static Single/</span></span>
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<pre style="margin: 0;"> <span id="LC21" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> /Information Form are Interval Graphs/, 2007.</span></span>
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<pre style="margin: 0;"> <span id="LC22" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;">-<span id="LC25" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Originally taken from the dom-lt package.</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * Strictness</span></span>
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Unless stated otherwise all exposed functions might fully evaluate their input</span></span>
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> but are not guaranteed to do so.</span></span>
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"></span></span>
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<pre style="margin: 0;"> <span id="LC28" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
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<pre style="margin: 0;"> <span id="LC29" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC30" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">GHC.CmmToAsm.CFG.Dominators</span> <span class="p">(</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -39,11 +41,12 @@ module GHC.CmmToAsm.CFG.Dominators (</td>
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<pre style="margin: 0;"> <span id="LC41" class="line" lang="haskell"><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC42" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC43" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prelude</span></span>
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<pre style="margin: 0;">-<span id="LC42" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"><span class="kr" style="font-weight: 600;"><span class="idiff left">import</span></span><span class="idiff"> </span><span class="nn" style="color: #555;"><span class="idiff">Data.Monoid</span></span><span class="p"><span class="idiff">(</span></span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Monoid</span></span><span class="p"><span class="idiff">(</span></span><span class="o" style="font-weight: 600;"><span class="idiff">..</span></span><span class="p"><span class="idiff right">))</span></span></span>
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<pre style="margin: 0;"> <span id="LC45" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Bifunctor</span></span>
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<pre style="margin: 0;"> <span id="LC46" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Tuple</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">swap</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC47" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC48" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Tree</span></span>
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span></span>
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<pre style="margin: 0;"> <span id="LC50" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.IntMap</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IntMap</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC51" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.IntSet</span><span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IntSet</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC52" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="k" style="font-weight: 600;">qualified</span> <span class="nn" style="color: #555;">Data.IntMap.Strict</span> <span class="k" style="font-weight: 600;">as</span> <span class="n" style="color: #333;">IM</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -53,12 +56,9 @@ import Control.Monad</td>
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<pre style="margin: 0;"> <span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad.ST.Strict</span></span>
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<pre style="margin: 0;"> <span id="LC57" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC58" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Array.ST</span></span>
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<pre style="margin: 0;">-<span id="LC56" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Array.Base</span> <span class="k" style="font-weight: 600;">hiding</span> <span class="p">((</span><span class="o" style="font-weight: 600;">!</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC57" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- (unsafeNewArray_</span></span>
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<pre style="margin: 0;">-<span id="LC58" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ,unsafeWrite,unsafeRead</span></span>
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<pre style="margin: 0;">-<span id="LC59" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- ,readArray,writeArray)</span></span>
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<pre style="margin: 0;">-<span id="LC60" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC61" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Utils.Misc</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">debugIsOn</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC59" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Array.Base</span></span>
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<pre style="margin: 0;">+<span id="LC60" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">unsafeNewArray_</span></span>
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<pre style="margin: 0;">+<span id="LC61" class="line" lang="haskell"> <span class="p">,</span><span class="nf" style="color: #900; font-weight: 600;">unsafeWrite</span><span class="p">,</span><span class="nf" style="color: #900; font-weight: 600;">unsafeRead</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC62" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC63" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------------------------------------</span></span>
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<pre style="margin: 0;"> <span id="LC64" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -152,9 +152,9 @@ idomM = do</td>
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<pre style="margin: 0;"> <span id="LC152" class="line" lang="haskell"> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">gets</span> <span class="n" style="color: #333;">dfsE</span></span>
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<pre style="margin: 0;"> <span id="LC153" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">..</span><span class="mi" style="color: #099;">1</span><span class="p">]</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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154
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<pre style="margin: 0;"> <span id="LC154" class="line" lang="haskell"> <span class="n" style="color: #333;">w</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">ndfsM</span> <span class="n" style="color: #333;">i</span></span>
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155
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<pre style="margin: 0;">-<span id="LC155" class="line" lang="haskell"> <span class="n" style="color: #333;">sw</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">sdnoM</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"> <span class="n" style="color: #333;">ps</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">predsM</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;"> <span id="LC156" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="n" style="color: #333;">ps</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">v</span><span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC157" class="line" lang="haskell"> <span class="n" style="color: #333;">sw</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">sdnoM</span> <span class="n" style="color: #333;">w</span></span>
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<pre style="margin: 0;"> <span id="LC158" class="line" lang="haskell"> <span class="n" style="color: #333;">u</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">eval</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;"> <span id="LC159" class="line" lang="haskell"> <span class="n" style="color: #333;">su</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">sdnoM</span> <span class="n" style="color: #333;">u</span></span>
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<pre style="margin: 0;"> <span id="LC160" class="line" lang="haskell"> <span class="n" style="color: #333;">when</span> <span class="p">(</span><span class="n" style="color: #333;">su</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">sw</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -291,9 +291,10 @@ dfsDom i = do</td>
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<pre style="margin: 0;"> <span id="LC291" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC292" class="line" lang="haskell"><span class="n" style="color: #333;">initEnv</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Rooted</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Env</span> <span class="n" style="color: #333;">s</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC293" class="line" lang="haskell"><span class="n" style="color: #333;">initEnv</span> <span class="p">(</span><span class="n" style="color: #333;">r0</span><span class="p">,</span><span class="n" style="color: #333;">g0</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC294" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Graph renumbered to indices from 1 to |V|</span></span>
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<pre style="margin: 0;"> <span id="LC295" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">g</span><span class="p">,</span><span class="n" style="color: #333;">rnmap</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">renum</span> <span class="mi" style="color: #099;">1</span> <span class="n" style="color: #333;">g0</span></span>
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<pre style="margin: 0;">-<span id="LC295" class="line" lang="haskell"> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">predG</span> <span class="n" style="color: #333;">g</span></span>
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<pre style="margin: 0;">-<span id="LC296" class="line" lang="haskell"> <span class="n" style="color: #333;">r</span><span class="idiff left"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rnmap</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IM</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.!</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">r0</span></span></span>
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<pre style="margin: 0;">+<span id="LC296" class="line" lang="haskell"> <span class="n" style="color: #333;">pred</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">predG</span> <span class="n" style="color: #333;">g</span><span class="idiff left"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- reverse graph</span></span></span>
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<pre style="margin: 0;">+<span id="LC297" class="line" lang="haskell"> <span class="n" style="color: #333;">r<span class="idiff left">oot</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">rnmap</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IM</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.!</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">r0</span></span><span class="idiff"> </span><span class="c1" style="color: #998; font-style: italic;"><span class="idiff right">-- renamed root</span></span></span>
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<pre style="margin: 0;"> <span id="LC298" class="line" lang="haskell"> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">size</span> <span class="n" style="color: #333;">g</span></span>
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<pre style="margin: 0;"> <span id="LC299" class="line" lang="haskell"> <span class="n" style="color: #333;">ns</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC300" class="line" lang="haskell"> <span class="n" style="color: #333;">m</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -315,13 +316,14 @@ initEnv (r0,g0) = do</td>
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<pre style="margin: 0;"> <span id="LC316" class="line" lang="haskell"> <span class="n" style="color: #333;">ndfs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newI</span> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;"> <span id="LC317" class="line" lang="haskell"> <span class="n" style="color: #333;">dfn</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newI</span> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;"> <span id="LC318" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC319" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Initialize all arrays</span></span>
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<pre style="margin: 0;"> <span id="LC320" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span> <span class="p">(</span><span class="n" style="color: #333;">doms</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC321" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span> <span class="p">(</span><span class="n" style="color: #333;">sdno</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC322" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">1</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC323" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span> <span class="p">(</span><span class="n" style="color: #333;">ancestor</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC324" class="line" lang="haskell"> <span class="n" style="color: #333;">forM_</span> <span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="o" style="font-weight: 600;">..</span><span class="n" style="color: #333;">n</span><span class="p">]</span> <span class="p">(</span><span class="n" style="color: #333;">child</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC325" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC324" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">doms</span><span class="o" style="font-weight: 600;">.=</span><span class="n" style="color: #333;">r</span><span class="p"><span class="idiff left">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">r</span></span></span>
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<pre style="margin: 0;">+<span id="LC326" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">doms</span><span class="o" style="font-weight: 600;">.=</span><span class="n" style="color: #333;">r<span class="idiff left">oot</span></span><span class="p"><span class="idiff">)</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff right">root</span></span></span>
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<pre style="margin: 0;"> <span id="LC327" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC328" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">label</span><span class="o" style="font-weight: 600;">.=</span><span class="mi" style="color: #099;">0</span><span class="p">)</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC329" class="line" lang="haskell"></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -329,7 +331,7 @@ initEnv (r0,g0) = do</td>
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<pre style="margin: 0;"> <span id="LC331" class="line" lang="haskell"> <span class="p">{</span><span class="n" style="color: #333;">rnE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rna</span></span>
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<pre style="margin: 0;"> <span id="LC332" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">dfsE</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;"> <span id="LC333" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">zeroE</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">0</span></span>
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<pre style="margin: 0;">-<span id="LC332" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">rootE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">r</span></span>
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<pre style="margin: 0;">+<span id="LC334" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">rootE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">r<span class="idiff left right">oot</span></span></span>
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<pre style="margin: 0;"> <span id="LC335" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">labelE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">label</span></span>
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<pre style="margin: 0;"> <span id="LC336" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">parentE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">parent</span></span>
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<pre style="margin: 0;"> <span id="LC337" class="line" lang="haskell"> <span class="p">,</span><span class="n" style="color: #333;">ancestorE</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">ancestor</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="364" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="366" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -364,11 +366,11 @@ domM = fetch domE</td>
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<pre style="margin: 0;"> <span id="LC366" class="line" lang="haskell"><span class="n" style="color: #333;">rootM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span></span>
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<pre style="margin: 0;"> <span id="LC367" class="line" lang="haskell"><span class="n" style="color: #333;">rootM</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="n" style="color: #333;">rootE</span></span>
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<pre style="margin: 0;"> <span id="LC368" class="line" lang="haskell"><span class="n" style="color: #333;">succsM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC367" class="line" lang="haskell"><span class="n" style="color: #333;">succsM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="idiff left right"> </span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">succE</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC369" class="line" lang="haskell"><span class="n" style="color: #333;">succsM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">succE</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC370" class="line" lang="haskell"><span class="n" style="color: #333;">predsM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC369" class="line" lang="haskell"><span class="n" style="color: #333;">predsM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="idiff left right"> </span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">predE</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC371" class="line" lang="haskell"><span class="n" style="color: #333;">predsM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">predE</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC372" class="line" lang="haskell"><span class="n" style="color: #333;">bucketM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">]</span></span>
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<pre style="margin: 0;">-<span id="LC371" class="line" lang="haskell"><span class="n" style="color: #333;">bucketM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="idiff left right"> </span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">bucketE</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC373" class="line" lang="haskell"><span class="n" style="color: #333;">bucketM</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">gets</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">bucketE</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC374" class="line" lang="haskell"><span class="n" style="color: #333;">sizeM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;"> <span id="LC375" class="line" lang="haskell"><span class="n" style="color: #333;">sizeM</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fetch</span> <span class="n" style="color: #333;">sizeE</span></span>
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<pre style="margin: 0;"> <span id="LC376" class="line" lang="haskell"><span class="n" style="color: #333;">sdnoM</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Dom</span> <span class="n" style="color: #333;">s</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -400,21 +402,16 @@ type Arr s a = A s Int a</td>
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<pre style="margin: 0;"> <span id="LC402" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">infixl</span> <span class="mi" style="color: #099;">9</span> <span class="o" style="font-weight: 600;">!:</span></span>
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<pre style="margin: 0;"> <span id="LC403" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">infixr</span> <span class="mi" style="color: #099;">2</span> <span class="o" style="font-weight: 600;">.=</span></span>
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<pre style="margin: 0;"> <span id="LC404" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC405" class="line" lang="haskell"><span class="cd">-- | arr .= x idx => write x to index</span></span>
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<pre style="margin: 0;"> <span id="LC406" class="line" lang="haskell"><span class="p">(</span><span class="o" style="font-weight: 600;">.=</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MArray</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">A</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC407" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Arr</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">-<span id="LC405" class="line" lang="haskell"><span class="p">(</span><span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">.=</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">-<span id="LC406" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">writeArray</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">-<span id="LC407" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unsafeWrite</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;">+<span id="LC408" class="line" lang="haskell"><span class="p">(</span><span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;">.=</span> <span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unsafeWrite</span> <span class="n" style="color: #333;">v</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;"> <span id="LC409" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC410" class="line" lang="haskell"><span class="p">(</span><span class="o" style="font-weight: 600;">!:</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MArray</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">A</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC411" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">A</span> <span class="n" style="color: #333;">s</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;">-<span id="LC411" class="line" lang="haskell"><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">!:</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">-<span id="LC412" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">debugIsOn</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC413" class="line" lang="haskell"> <span class="n" style="color: #333;">o</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">readArray</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">-<span id="LC414" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">o</span></span>
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<pre style="margin: 0;">-<span id="LC415" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">|</span> <span class="n" style="color: #333;">otherwise</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">-<span id="LC416" class="line" lang="haskell"> <span class="n" style="color: #333;">o</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unsafeRead</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">-<span id="LC417" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">o</span></span>
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<pre style="margin: 0;">+<span id="LC412" class="line" lang="haskell"><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">!:</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC413" class="line" lang="haskell"> <span class="n" style="color: #333;">o</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">unsafeRead</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">+<span id="LC414" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$!</span> <span class="n" style="color: #333;">o</span></span>
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<pre style="margin: 0;"> <span id="LC415" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC416" class="line" lang="haskell"><span class="n" style="color: #333;">new</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MArray</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">A</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC417" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Arr</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -423,30 +420,10 @@ new n = unsafeNewArray_ (0,n-1)</td>
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<pre style="margin: 0;"> <span id="LC420" class="line" lang="haskell"><span class="n" style="color: #333;">newI</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Arr</span> <span class="n" style="color: #333;">s</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC421" class="line" lang="haskell"><span class="n" style="color: #333;">newI</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">new</span></span>
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<pre style="margin: 0;"> <span id="LC422" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC426" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- newD :: Int -> ST s (Arr s Double)</span></span>
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<pre style="margin: 0;">-<span id="LC427" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- newD = new</span></span>
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<pre style="margin: 0;">-<span id="LC428" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC429" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- dump :: (MArray (A s) a (ST s)) => Arr s a -> ST s [a]</span></span>
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<pre style="margin: 0;">-<span id="LC430" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- dump a = do</span></span>
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<pre style="margin: 0;">-<span id="LC431" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (m,n) <- getBounds a</span></span>
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<pre style="margin: 0;">-<span id="LC432" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- forM [m..n] (\i -> a!:i)</span></span>
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<pre style="margin: 0;">-<span id="LC433" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC423" class="line" lang="haskell"><span class="n" style="color: #333;">writes</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MArray</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">A</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="n" style="color: #333;">a</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC424" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">Arr</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span><span class="n" style="color: #333;">a</span><span class="p">)]</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">s</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;"> <span id="LC425" class="line" lang="haskell"><span class="n" style="color: #333;">writes</span> <span class="n" style="color: #333;">a</span> <span class="n" style="color: #333;">xs</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">forM_</span> <span class="n" style="color: #333;">xs</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="n" style="color: #333;">i</span><span class="p">,</span><span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">.=</span><span class="n" style="color: #333;">x</span><span class="p">)</span> <span class="n" style="color: #333;">i</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC426" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC438" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- arr :: (MArray (A s) a (ST s)) => [a] -> ST s (Arr s a)</span></span>
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<pre style="margin: 0;">-<span id="LC439" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- arr xs = do</span></span>
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<pre style="margin: 0;">-<span id="LC440" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- let n = length xs</span></span>
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<pre style="margin: 0;">-<span id="LC441" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- a <- new n</span></span>
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<pre style="margin: 0;">-<span id="LC442" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- go a n 0 xs</span></span>
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<pre style="margin: 0;">-<span id="LC443" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- return a</span></span>
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<pre style="margin: 0;">-<span id="LC444" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- where go _ _ _ [] = return ()</span></span>
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<pre style="margin: 0;">-<span id="LC445" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- go a n i (x:xs)</span></span>
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<pre style="margin: 0;">-<span id="LC446" class="line" lang="haskell"><span class="cd">-- | i <= n = (a.=x) i >> go a n (i+1) xs</span></span>
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<pre style="margin: 0;">-<span id="LC447" class="line" lang="haskell"><span class="cd">-- | otherwise = return ()</span></span>
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<pre style="margin: 0;"> <span id="LC427" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC428" class="line" lang="haskell"><span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="p">)</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Monoid</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=></span> <span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">a</span></span>
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<pre style="margin: 0;"> <span id="LC429" class="line" lang="haskell"><span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="p">)</span> <span class="n" style="color: #333;">g</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">maybe</span> <span class="n" style="color: #333;">mempty</span> <span class="n" style="color: #333;">id</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">g</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -466,13 +443,11 @@ toEdges = concatMap (uncurry (fmap . (,))) . toAdj</td>
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<pre style="margin: 0;"> <span id="LC443" class="line" lang="haskell"><span class="n" style="color: #333;">predG</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Graph</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Graph</span></span>
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<pre style="margin: 0;"> <span id="LC444" class="line" lang="haskell"><span class="n" style="color: #333;">predG</span> <span class="n" style="color: #333;">g</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">unionWith</span> <span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">union</span> <span class="p">(</span><span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">g</span><span class="p">)</span> <span class="n" style="color: #333;">g0</span></span>
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<pre style="margin: 0;"> <span id="LC445" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">g0</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">fmap</span> <span class="p">(</span><span class="n" style="color: #333;">const</span> <span class="n" style="color: #333;">mempty</span><span class="p">)</span> <span class="n" style="color: #333;">g</span></span>
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<pre style="margin: 0;">-<span id="LC469" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">f</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">::</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IntMap</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IntSet</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">Int</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IntSet</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">-></span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IntMap</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff right">IntSet</span></span></span>
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<pre style="margin: 0;">-<span id="LC470" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">f</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">i</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">a</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">=</span></span> <span class="n" style="color: #333;">foldl'</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insertWith</span> <span class="n" style="color: #333;">mappend</span> <span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;">+<span id="LC446" class="line" lang="haskell"> <span class="n" style="color: #333;"><span class="idiff left">go</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff">=</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">flip</span></span><span class="idiff"> </span><span class="kt" style="color: #458; font-weight: 600;"><span class="idiff">IM</span></span><span class="o" style="font-weight: 600;"><span class="idiff">.</span></span><span class="n" style="color: #333;"><span class="idiff">foldrWithKey</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">mempty</span></span><span class="idiff"> </span><span class="p"><span class="idiff">(</span></span><span class="nf" style="color: #900; font-weight: 600;"><span class="idiff">\</span></span><span class="n" style="color: #333;"><span class="idiff">i</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">a</span></span><span class="idiff"> </span><span class="n" style="color: #333;"><span class="idiff">m</span></span><span class="idiff"> </span><span class="o" style="font-weight: 600;"><span class="idiff right">-></span></span></span>
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<pre style="margin: 0;">+<span id="LC447" class="line" lang="haskell"> <span class="idiff left right"> </span> <span class="n" style="color: #333;">foldl'</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">m</span> <span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insertWith</span> <span class="n" style="color: #333;">mappend</span> <span class="n" style="color: #333;">p</span></span>
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<pre style="margin: 0;"> <span id="LC448" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">singleton</span> <span class="n" style="color: #333;">i</span><span class="p">)</span> <span class="n" style="color: #333;">m</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC449" class="line" lang="haskell"> <span class="n" style="color: #333;">m</span></span>
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<pre style="margin: 0;">-<span id="LC473" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC474" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="kt" style="color: #458; font-weight: 600;">IntSet</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="kt" style="color: #458; font-weight: 600;">IntSet</span></span>
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<pre style="margin: 0;">-<span id="LC475" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">flip</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foldlWithKey'</span> <span class="n" style="color: #333;">mempty</span> <span class="n" style="color: #333;">f</span></span>
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<pre style="margin: 0;">+<span id="LC450" class="line" lang="haskell"> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">toList</span> <span class="n" style="color: #333;">a</span><span class="p">))</span></span>
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<pre style="margin: 0;"> <span id="LC451" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC452" class="line" lang="haskell"><span class="n" style="color: #333;">pruneReach</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Rooted</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Rooted</span></span>
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<pre style="margin: 0;"> <span id="LC453" class="line" lang="haskell"><span class="n" style="color: #333;">pruneReach</span> <span class="p">(</span><span class="n" style="color: #333;">r</span><span class="p">,</span><span class="n" style="color: #333;">g</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">r</span><span class="p">,</span><span class="n" style="color: #333;">g2</span><span class="p">)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -522,41 +497,35 @@ collectI (<>) f g</td>
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<pre style="margin: 0;"> <span id="LC497" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">a</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC498" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">g</span> <span class="n" style="color: #333;">a</span><span class="p">)</span> <span class="n" style="color: #333;">m</span><span class="p">)</span> <span class="n" style="color: #333;">mempty</span></span>
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<pre style="margin: 0;"> <span id="LC499" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC525" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- collect :: (Ord b) => (c -> c -> c)</span></span>
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<pre style="margin: 0;">-<span id="LC526" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- -> (a -> b) -> (a -> c) -> [a] -> Map b c</span></span>
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<pre style="margin: 0;">-<span id="LC527" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- collect (<>) f g</span></span>
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<pre style="margin: 0;">-<span id="LC528" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- = foldl' (\m a -> SM.insertWith (<>)</span></span>
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<pre style="margin: 0;">-<span id="LC529" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (f a)</span></span>
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<pre style="margin: 0;">-<span id="LC530" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (g a) m) mempty</span></span>
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<pre style="margin: 0;">-<span id="LC531" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC500" class="line" lang="haskell"><span class="cd">-- | renum n g: Rename all nodes</span></span>
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<pre style="margin: 0;">+<span id="LC501" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
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<pre style="margin: 0;">+<span id="LC502" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Gives nodes sequential names starting at n.</span></span>
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<pre style="margin: 0;">+<span id="LC503" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Returns the new graph and a mapping.</span></span>
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<pre style="margin: 0;"> <span id="LC504" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- (renamed, old -> new)</span></span>
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<pre style="margin: 0;"> <span id="LC505" class="line" lang="haskell"><span class="n" style="color: #333;">renum</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Graph</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Graph</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">)</span></span>
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<pre style="margin: 0;"> <span id="LC506" class="line" lang="haskell"><span class="n" style="color: #333;">renum</span> <span class="n" style="color: #333;">from</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="p">(</span><span class="kr" style="font-weight: 600;">_</span><span class="p">,</span><span class="n" style="color: #333;">m</span><span class="p">,</span><span class="n" style="color: #333;">g</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span><span class="p">(</span><span class="n" style="color: #333;">g</span><span class="p">,</span><span class="n" style="color: #333;">m</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC535" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foldlWithKey'</span></span>
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<pre style="margin: 0;">-<span id="LC536" class="line" lang="haskell"> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="n" style="color: #333;">from</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC537" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">-<span id="LC538" class="line" lang="haskell"> <span class="n" style="color: #333;">f</span> <span class="o" style="font-weight: 600;">::</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="kt" style="color: #458; font-weight: 600;">IntSet</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Node</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IntSet</span></span>
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<pre style="margin: 0;">-<span id="LC539" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">IntMap</span> <span class="kt" style="color: #458; font-weight: 600;">IntSet</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC540" class="line" lang="haskell"> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">new</span><span class="p">)</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">ss</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC541" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">j</span><span class="p">,</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">i</span></span>
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<pre style="margin: 0;">-<span id="LC542" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">n3</span><span class="p">,</span><span class="n" style="color: #333;">env3</span><span class="p">,</span><span class="n" style="color: #333;">ss2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">fold</span></span>
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<pre style="margin: 0;">-<span id="LC543" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">k</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">new</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span></span>
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<pre style="margin: 0;">-<span id="LC544" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC545" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="p">,</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">,</span><span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insert</span><span class="p">`</span> <span class="n" style="color: #333;">new</span><span class="p">))</span></span>
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<pre style="margin: 0;">-<span id="LC546" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">)</span> <span class="n" style="color: #333;">ss</span></span>
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<pre style="margin: 0;">-<span id="LC547" class="line" lang="haskell"> <span class="n" style="color: #333;">new2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insertWith</span> <span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">union</span> <span class="n" style="color: #333;">j</span> <span class="n" style="color: #333;">ss2</span> <span class="n" style="color: #333;">new</span></span>
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<pre style="margin: 0;">-<span id="LC548" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">n3</span><span class="p">,</span><span class="n" style="color: #333;">env3</span><span class="p">,</span><span class="n" style="color: #333;">new2</span><span class="p">)</span></span>
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<pre style="margin: 0;">-<span id="LC549" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">-<span id="LC550" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span></span>
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<pre style="margin: 0;">-<span id="LC551" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Node</span></span>
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<pre style="margin: 0;">-<span id="LC552" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">)</span></span>
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553
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<pre style="margin: 0;">-<span id="LC553" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span></span>
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<pre style="margin: 0;">-<span id="LC554" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">env</span> <span class="kr" style="font-weight: 600;">of</span></span>
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555
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<pre style="margin: 0;">-<span id="LC555" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">j</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">j</span><span class="p">,</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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556
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<pre style="margin: 0;">-<span id="LC556" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insert</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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507
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<pre style="margin: 0;">+<span id="LC507" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">.</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">foldrWithKey</span></span>
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508
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<pre style="margin: 0;">+<span id="LC508" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">ss</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">new</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span></span>
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509
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<pre style="margin: 0;">+<span id="LC509" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">let</span> <span class="p">(</span><span class="n" style="color: #333;">j</span><span class="p">,</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">i</span></span>
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510
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<pre style="margin: 0;">+<span id="LC510" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">n3</span><span class="p">,</span><span class="n" style="color: #333;">env3</span><span class="p">,</span><span class="n" style="color: #333;">ss2</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">fold</span></span>
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511
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<pre style="margin: 0;">+<span id="LC511" class="line" lang="haskell"> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">k</span> <span class="p">(</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span><span class="p">,</span><span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">new</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span></span>
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512
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<pre style="margin: 0;">+<span id="LC512" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">go</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">k</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<td class="diff-line-num new new_line" data-linenumber="513" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
513
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<pre style="margin: 0;">+<span id="LC513" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">l</span><span class="p">,</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">)</span><span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">,</span><span class="n" style="color: #333;">l</span> <span class="p">`</span><span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insert</span><span class="p">`</span> <span class="n" style="color: #333;">new</span><span class="p">))</span></span>
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514
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<pre style="margin: 0;">+<span id="LC514" class="line" lang="haskell"> <span class="p">(</span><span class="n" style="color: #333;">n2</span><span class="p">,</span><span class="n" style="color: #333;">env2</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">)</span> <span class="n" style="color: #333;">ss</span></span>
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515
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<pre style="margin: 0;">+<span id="LC515" class="line" lang="haskell"> <span class="n" style="color: #333;">new2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insertWith</span> <span class="kt" style="color: #458; font-weight: 600;">IS</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">union</span> <span class="n" style="color: #333;">j</span> <span class="n" style="color: #333;">ss2</span> <span class="n" style="color: #333;">new</span></span>
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516
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<pre style="margin: 0;">+<span id="LC516" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">in</span> <span class="p">(</span><span class="n" style="color: #333;">n3</span><span class="p">,</span><span class="n" style="color: #333;">env3</span><span class="p">,</span><span class="n" style="color: #333;">new2</span><span class="p">))</span> <span class="p">(</span><span class="n" style="color: #333;">from</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">,</span><span class="n" style="color: #333;">mempty</span><span class="p">)</span></span>
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517
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<pre style="margin: 0;">+<span id="LC517" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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518
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<pre style="margin: 0;">+<span id="LC518" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span></span>
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519
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<pre style="margin: 0;">+<span id="LC519" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Node</span></span>
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520
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<pre style="margin: 0;">+<span id="LC520" class="line" lang="haskell"> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">NodeMap</span> <span class="kt" style="color: #458; font-weight: 600;">Node</span><span class="p">)</span></span>
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521
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<pre style="margin: 0;">+<span id="LC521" class="line" lang="haskell"> <span class="n" style="color: #333;">go</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">env</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span></span>
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522
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<pre style="margin: 0;">+<span id="LC522" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">case</span> <span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">lookup</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">env</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<td class="diff-line-num new new_line" data-linenumber="523" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
523
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<pre style="margin: 0;">+<span id="LC523" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">j</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">j</span><span class="p">,</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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<td class="diff-line-num new new_line" data-linenumber="524" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
524
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<pre style="margin: 0;">+<span id="LC524" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">,</span><span class="n" style="color: #333;">n</span><span class="o" style="font-weight: 600;">+</span><span class="mi" style="color: #099;">1</span><span class="p">,</span><span class="kt" style="color: #458; font-weight: 600;">IM</span><span class="o" style="font-weight: 600;">.</span><span class="n" style="color: #333;">insert</span> <span class="n" style="color: #333;">i</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">env</span><span class="p">)</span></span>
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557
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525
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<pre style="margin: 0;"> <span id="LC525" class="line" lang="haskell"></span>
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558
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526
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<pre style="margin: 0;"> <span id="LC526" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------------------------------------------</span></span>
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559
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527
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<pre style="margin: 0;"> <span id="LC527" class="line" lang="haskell"></span>
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528
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<pre style="margin: 0;">+<span id="LC528" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Nothing better than reinvinting the state monad.</span></span>
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560
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529
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<pre style="margin: 0;"> <span id="LC529" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">newtype</span> <span class="kt" style="color: #458; font-weight: 600;">S</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">s</span> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">S</span> <span class="p">{</span><span class="n" style="color: #333;">unS</span> <span class="o" style="font-weight: 600;">::</span> <span class="n" style="color: #333;">forall</span> <span class="n" style="color: #333;">o</span><span class="o" style="font-weight: 600;">.</span> <span class="p">(</span><span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">o</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">ST</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">o</span><span class="p">}</span></span>
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561
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530
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<pre style="margin: 0;"> <span id="LC530" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">instance</span> <span class="kt" style="color: #458; font-weight: 600;">Functor</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">S</span> <span class="n" style="color: #333;">z</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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562
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531
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<pre style="margin: 0;"> <span id="LC531" class="line" lang="haskell"> <span class="n" style="color: #333;">fmap</span> <span class="n" style="color: #333;">f</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">S</span> <span class="n" style="color: #333;">g</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">S</span> <span class="p">(</span><span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">g</span> <span class="p">(</span><span class="n" style="color: #333;">k</span> <span class="o" style="font-weight: 600;">.</span> <span class="n" style="color: #333;">f</span><span class="p">))</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="594" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="563" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -594,4 +563,3 @@ fetch :: (MArray (A z) a (ST z))</td>
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594
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563
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<pre style="margin: 0;"> <span id="LC563" class="line" lang="haskell"><span class="n" style="color: #333;">fetch</span> <span class="n" style="color: #333;">f</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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595
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564
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<pre style="margin: 0;"> <span id="LC564" class="line" lang="haskell"> <span class="n" style="color: #333;">a</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">gets</span> <span class="n" style="color: #333;">f</span></span>
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596
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565
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<pre style="margin: 0;"> <span id="LC565" class="line" lang="haskell"> <span class="n" style="color: #333;">st</span> <span class="p">(</span><span class="n" style="color: #333;">a</span><span class="o" style="font-weight: 600;">!:</span><span class="n" style="color: #333;">i</span><span class="p">)</span></span></pre>
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597
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<pre style="margin: 0;">-<span id="LC597" class="line" lang="haskell"></span></pre>
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