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<pre><a name="line-1"></a><span class='hs-comment'>-- XXX design uncertainty: should preResets be inserted into nullView?</span>
<a name="line-2"></a><span class='hs-comment'>-- if not, why not? ADDED</span>
<a name="line-3"></a>
<a name="line-4"></a><span class='hs-comment'>-- XXX design uncertainty: what does act -> actNullable -></span>
<a name="line-5"></a><span class='hs-comment'>-- actNullableTagless not use nullQ and same for inStar, etc?</span>
<a name="line-6"></a><span class='hs-comment'>-- TODO : try rewriting whole qToNFA in terms of "act"</span>
<a name="line-7"></a><span class='hs-comment'>-- (That will require re-organizing the continuation data a bit)</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-comment'>-- | "Text.Regex.TDFA.TNFA" converts the CorePattern Q/P data (and its</span>
<a name="line-10"></a><span class='hs-comment'>-- Pattern leafs) to a QNFA tagged non-deterministic finite automata.</span>
<a name="line-11"></a><span class='hs-comment'>-- </span>
<a name="line-12"></a><span class='hs-comment'>-- This holds every possible way to follow one state by another, while</span>
<a name="line-13"></a><span class='hs-comment'>-- in the DFA these will be reduced by picking a single best</span>
<a name="line-14"></a><span class='hs-comment'>-- transition for each (soure,destination) pair. The transitions are</span>
<a name="line-15"></a><span class='hs-comment'>-- heavily and often redundantly annotated with tasks to perform, and</span>
<a name="line-16"></a><span class='hs-comment'>-- this redundancy is reduced when picking the best transition. So</span>
<a name="line-17"></a><span class='hs-comment'>-- far, keeping all this information has helped fix bugs in both the</span>
<a name="line-18"></a><span class='hs-comment'>-- design and implementation.</span>
<a name="line-19"></a><span class='hs-comment'>--</span>
<a name="line-20"></a><span class='hs-comment'>-- The QNFA for a Pattern with a starTraned Q/P form with N one</span>
<a name="line-21"></a><span class='hs-comment'>-- character accepting leaves has at most N+1 nodes. These nodes</span>
<a name="line-22"></a><span class='hs-comment'>-- repesent the future choices after accepting a leaf. The processing</span>
<a name="line-23"></a><span class='hs-comment'>-- of Or nodes often reduces this number by sharing at the end of the</span>
<a name="line-24"></a><span class='hs-comment'>-- different paths. Turning off capturing while compiling the pattern</span>
<a name="line-25"></a><span class='hs-comment'>-- may (future extension) reduce this further for some patterns by</span>
<a name="line-26"></a><span class='hs-comment'>-- processing Star with optimizations. This compact design also means</span>
<a name="line-27"></a><span class='hs-comment'>-- that tags are assigned not just to be updated before taking a</span>
<a name="line-28"></a><span class='hs-comment'>-- transition (PreUpdate) but also after the transition (PostUpdate).</span>
<a name="line-29"></a><span class='hs-comment'>-- </span>
<a name="line-30"></a><span class='hs-comment'>-- Uses recursive do notation.</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-varop'>.</span><span class='hs-conid'>TDFA</span><span class='hs-varop'>.</span><span class='hs-conid'>TNFA</span><span class='hs-layout'>(</span><span class='hs-varid'>patternToNFA</span>
<a name="line-33"></a> <span class='hs-layout'>,</span><span class='hs-conid'>QNFA</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>QT</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>QTrans</span><span class='hs-layout'>,</span><span class='hs-conid'>TagUpdate</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='hs-comment'>{- By Chris Kuklewicz, 2007. BSD License, see the LICENSE file. -}</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-layout'>(</span><span class='hs-varid'>when</span><span class='hs-layout'>)</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span><span class='hs-layout'>(</span><span class='hs-conid'>State</span><span class='hs-layout'>,</span><span class='hs-varid'>runState</span><span class='hs-layout'>,</span><span class='hs-varid'>execState</span><span class='hs-layout'>,</span><span class='hs-varid'>get</span><span class='hs-layout'>,</span><span class='hs-varid'>put</span><span class='hs-layout'>,</span><span class='hs-varid'>modify</span><span class='hs-layout'>)</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span><span class='hs-varop'>.</span><span class='hs-conid'>IArray</span><span class='hs-layout'>(</span><span class='hs-conid'>Array</span><span class='hs-layout'>,</span><span class='hs-varid'>array</span><span class='hs-layout'>)</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span><span class='hs-layout'>(</span><span class='hs-varid'>toLower</span><span class='hs-layout'>,</span><span class='hs-varid'>toUpper</span><span class='hs-layout'>,</span><span class='hs-varid'>isAlpha</span><span class='hs-layout'>,</span><span class='hs-varid'>ord</span><span class='hs-layout'>)</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span><span class='hs-layout'>(</span><span class='hs-varid'>foldl'</span><span class='hs-layout'>)</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span><span class='hs-layout'>)</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>IMap</span><span class='hs-layout'>(</span><span class='hs-varid'>toAscList</span><span class='hs-layout'>,</span><span class='hs-varid'>null</span><span class='hs-layout'>,</span><span class='hs-varid'>unionWith</span><span class='hs-layout'>,</span><span class='hs-varid'>singleton</span><span class='hs-layout'>,</span><span class='hs-varid'>fromList</span><span class='hs-layout'>,</span><span class='hs-varid'>fromDistinctAscList</span><span class='hs-layout'>)</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-conid'>CharMap2</span><span class='hs-layout'>(</span><span class='hs-conid'>CharMap</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-conid'>CharMap2</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Map</span><span class='hs-layout'>(</span><span class='hs-varid'>null</span><span class='hs-layout'>,</span><span class='hs-varid'>singleton</span><span class='hs-layout'>,</span><span class='hs-varid'>map</span><span class='hs-layout'>)</span>
<a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntMap</span><span class='hs-varop'>.</span><span class='hs-conid'>EnumMap2</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>EMap</span><span class='hs-layout'>(</span><span class='hs-varid'>null</span><span class='hs-layout'>,</span><span class='hs-varid'>keysSet</span><span class='hs-layout'>,</span><span class='hs-varid'>assocs</span><span class='hs-layout'>)</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-conid'>EnumSet2</span><span class='hs-layout'>(</span><span class='hs-conid'>EnumSet</span><span class='hs-layout'>)</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IntSet</span><span class='hs-varop'>.</span><span class='hs-conid'>EnumSet2</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Set</span><span class='hs-layout'>(</span><span class='hs-varid'>singleton</span><span class='hs-layout'>,</span><span class='hs-varid'>toList</span><span class='hs-layout'>,</span><span class='hs-varid'>insert</span><span class='hs-layout'>)</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span><span class='hs-layout'>(</span><span class='hs-varid'>catMaybes</span><span class='hs-layout'>,</span><span class='hs-varid'>isNothing</span><span class='hs-layout'>)</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span><span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-varid'>mappend</span><span class='hs-layout'>)</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>S</span><span class='hs-layout'>(</span><span class='hs-conid'>Set</span><span class='hs-layout'>,</span><span class='hs-varid'>insert</span><span class='hs-layout'>,</span><span class='hs-varid'>toAscList</span><span class='hs-layout'>,</span><span class='hs-varid'>empty</span><span class='hs-layout'>)</span>
<a name="line-52"></a>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-varop'>.</span><span class='hs-conid'>TDFA</span><span class='hs-varop'>.</span><span class='hs-conid'>Common</span><span class='hs-layout'>(</span><span class='hs-conid'>QT</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>QNFA</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>QTrans</span><span class='hs-layout'>,</span><span class='hs-conid'>TagTask</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>TagUpdate</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>DoPa</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-54"></a> <span class='hs-layout'>,</span><span class='hs-conid'>CompOption</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-55"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Tag</span><span class='hs-layout'>,</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-conid'>TagList</span><span class='hs-layout'>,</span><span class='hs-conid'>Index</span><span class='hs-layout'>,</span><span class='hs-conid'>WinTags</span><span class='hs-layout'>,</span><span class='hs-conid'>GroupIndex</span><span class='hs-layout'>,</span><span class='hs-conid'>GroupInfo</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-56"></a> <span class='hs-layout'>,</span><span class='hs-varid'>common_error</span><span class='hs-layout'>,</span><span class='hs-varid'>noWin</span><span class='hs-layout'>,</span><span class='hs-varid'>snd3</span><span class='hs-layout'>,</span><span class='hs-varid'>mapSnd</span><span class='hs-layout'>)</span>
<a name="line-57"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-varop'>.</span><span class='hs-conid'>TDFA</span><span class='hs-varop'>.</span><span class='hs-conid'>CorePattern</span><span class='hs-layout'>(</span><span class='hs-conid'>Q</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>P</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>OP</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>WhichTest</span><span class='hs-layout'>,</span><span class='hs-varid'>cleanNullView</span><span class='hs-layout'>,</span><span class='hs-conid'>NullView</span>
<a name="line-58"></a> <span class='hs-layout'>,</span><span class='hs-conid'>SetTestInfo</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>Wanted</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>TestInfo</span>
<a name="line-59"></a> <span class='hs-layout'>,</span><span class='hs-varid'>mustAccept</span><span class='hs-layout'>,</span><span class='hs-varid'>cannotAccept</span><span class='hs-layout'>,</span><span class='hs-varid'>patternToQ</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-varop'>.</span><span class='hs-conid'>TDFA</span><span class='hs-varop'>.</span><span class='hs-conid'>Pattern</span><span class='hs-layout'>(</span><span class='hs-conid'>Pattern</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>PatternSet</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>unSEC</span><span class='hs-layout'>,</span><span class='hs-conid'>PatternSetCharacterClass</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-61"></a><span class='hs-comment'>--import Debug.Trace</span>
<a name="line-62"></a>
<a name="line-63"></a><a name="ecart"></a><span class='hs-definition'>ecart</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-64"></a><span class='hs-definition'>ecart</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="err"></a><span class='hs-definition'>err</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-67"></a><span class='hs-definition'>err</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>common_error</span> <span class='hs-str'>"Text.Regex.TDFA.TNFA"</span> <span class='hs-varid'>t</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="debug"></a><span class='hs-definition'>debug</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-70"></a><span class='hs-definition'>debug</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="qtwin"></a><span class='hs-definition'>qtwin</span><span class='hs-layout'>,</span><span class='hs-varid'>qtlose</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span>
<a name="line-73"></a><span class='hs-comment'>-- qtwin is the continuation after matching the whole pattern. It has</span>
<a name="line-74"></a><span class='hs-comment'>-- no futher transitions and sets tag #1 to the current position.</span>
<a name="line-75"></a><span class='hs-definition'>qtwin</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_win</span><span class='hs-keyglyph'>=</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-conid'>TagTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_trans</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_other</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>mempty</span><span class='hs-layout'>}</span>
<a name="line-76"></a><a name="qtlose"></a><span class='hs-comment'>-- qtlose is the continuation to nothing, used when ^ or $ tests fail.</span>
<a name="line-77"></a><span class='hs-definition'>qtlose</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_win</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_trans</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_other</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>mempty</span><span class='hs-layout'>}</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="patternToNFA"></a><span class='hs-definition'>patternToNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CompOption</span>
<a name="line-80"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Pattern</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-conid'>GroupIndex</span><span class='hs-layout'>,</span> <span class='hs-conid'>DoPa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-81"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Index</span><span class='hs-layout'>,</span><span class='hs-conid'>Array</span> <span class='hs-conid'>Index</span> <span class='hs-conid'>QNFA</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Array</span> <span class='hs-conid'>Tag</span> <span class='hs-conid'>OP</span>
<a name="line-83"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Array</span> <span class='hs-conid'>GroupIndex</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>GroupInfo</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-84"></a><span class='hs-definition'>patternToNFA</span> <span class='hs-varid'>compOpt</span> <span class='hs-varid'>pattern</span> <span class='hs-keyglyph'>=</span>
<a name="line-85"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>q</span><span class='hs-layout'>,</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>groups</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>patternToQ</span> <span class='hs-varid'>compOpt</span> <span class='hs-varid'>pattern</span>
<a name="line-86"></a> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unlines</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>show</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>]</span>
<a name="line-87"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>debug</span> <span class='hs-varid'>msg</span> <span class='hs-layout'>(</span><span class='hs-varid'>qToNFA</span> <span class='hs-varid'>compOpt</span> <span class='hs-varid'>q</span><span class='hs-layout'>,</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>groups</span><span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='hs-comment'>-- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == </span>
<a name="line-90"></a><span class='hs-comment'>-- Query function on Q</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="nullable"></a><span class='hs-definition'>nullable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-93"></a><span class='hs-definition'>nullable</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>null</span> <span class='hs-varop'>.</span> <span class='hs-varid'>nullQ</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="notNullable"></a><span class='hs-definition'>notNullable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-96"></a><span class='hs-definition'>notNullable</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>null</span> <span class='hs-varop'>.</span> <span class='hs-varid'>nullQ</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="maybeOnlyEmpty"></a><span class='hs-comment'>-- This asks if the preferred (i.e. first) NullView has no tests.</span>
<a name="line-99"></a><span class='hs-definition'>maybeOnlyEmpty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>WinTags</span>
<a name="line-100"></a><span class='hs-definition'>maybeOnlyEmpty</span> <span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>nullQ</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>SetTestInfo</span> <span class='hs-varid'>sti</span><span class='hs-layout'>,</span><span class='hs-varid'>tags</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>EMap</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>sti</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>tags</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-101"></a><span class='hs-definition'>maybeOnlyEmpty</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="usesQNFA"></a><span class='hs-definition'>usesQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-104"></a><span class='hs-definition'>usesQNFA</span> <span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>wants</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>WantsBoth</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-105"></a><span class='hs-definition'>usesQNFA</span> <span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>wants</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>WantsQNFA</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-106"></a><span class='hs-definition'>usesQNFA</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-107"></a>
<a name="line-108"></a><span class='hs-comment'>-- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == </span>
<a name="line-109"></a><span class='hs-comment'>-- Functions related to QT</span>
<a name="line-110"></a>
<a name="line-111"></a><a name="mkQNFA"></a><span class='hs-comment'>-- dumb smart constructor used by qToQNFA</span>
<a name="line-112"></a><span class='hs-comment'>-- Possible: Go through the qt and keep only the best tagged transition(s) to each state to make simple NFA?</span>
<a name="line-113"></a><span class='hs-definition'>mkQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Index</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QNFA</span>
<a name="line-114"></a><span class='hs-definition'>mkQNFA</span> <span class='hs-varid'>i</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>"\n>QNFA id="</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-115"></a> <span class='hs-conid'>QNFA</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>"\ngetting QT for "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="mkTesting"></a><span class='hs-comment'>-- This uses the Eq QT instance above</span>
<a name="line-118"></a><span class='hs-comment'>-- ZZZ</span>
<a name="line-119"></a><span class='hs-definition'>mkTesting</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-120"></a><span class='hs-definition'>mkTesting</span> <span class='hs-varid'>t</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>b</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>a</span><span class='hs-varop'>==</span><span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>t</span> <span class='hs-comment'>-- Move to nfsToDFA XXX</span>
<a name="line-121"></a><span class='hs-definition'>mkTesting</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>t</span>
<a name="line-122"></a>
<a name="line-123"></a><a name="nullQT"></a><span class='hs-definition'>nullQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-124"></a><span class='hs-definition'>nullQT</span> <span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_win</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_trans</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_other</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>o</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>noWin</span> <span class='hs-varid'>w</span> <span class='hs-varop'>&&</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>t</span> <span class='hs-varop'>&&</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>o</span>
<a name="line-125"></a><span class='hs-definition'>nullQT</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-126"></a>
<a name="line-127"></a><a name="listTestInfo"></a><span class='hs-comment'>-- This reconstructs the set of tests checked in processing QT, adding</span>
<a name="line-128"></a><span class='hs-comment'>-- them to the passed set.</span>
<a name="line-129"></a><span class='hs-definition'>listTestInfo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EnumSet</span> <span class='hs-conid'>WhichTest</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EnumSet</span> <span class='hs-conid'>WhichTest</span>
<a name="line-130"></a><span class='hs-definition'>listTestInfo</span> <span class='hs-varid'>qt</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>execState</span> <span class='hs-layout'>(</span><span class='hs-varid'>helper</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span>
<a name="line-131"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>helper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-132"></a> <span class='hs-varid'>helper</span> <span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wt</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>b</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-133"></a> <span class='hs-varid'>modify</span> <span class='hs-layout'>(</span><span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>wt</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-varid'>helper</span> <span class='hs-varid'>a</span>
<a name="line-135"></a> <span class='hs-varid'>helper</span> <span class='hs-varid'>b</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="applyNullViews"></a><span class='hs-comment'>-- This is used to view "win" only through NullView, and is used in</span>
<a name="line-138"></a><span class='hs-comment'>-- processing Or.</span>
<a name="line-139"></a><span class='hs-definition'>applyNullViews</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NullView</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-140"></a><span class='hs-definition'>applyNullViews</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>win</span>
<a name="line-141"></a><span class='hs-definition'>applyNullViews</span> <span class='hs-varid'>nvs</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-layout'>(</span><span class='hs-varid'>dominate</span> <span class='hs-varid'>win</span><span class='hs-layout'>)</span> <span class='hs-varid'>qtlose</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>cleanNullView</span> <span class='hs-varid'>nvs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-142"></a>
<a name="line-143"></a><a name="preferNullViews"></a><span class='hs-comment'>-- This is used to prefer to view "win" through NullView. Losing is</span>
<a name="line-144"></a><span class='hs-comment'>-- replaced by the plain win. This is employed by Star patterns to</span>
<a name="line-145"></a><span class='hs-comment'>-- express that the first iteration is allowed to match null, but</span>
<a name="line-146"></a><span class='hs-comment'>-- skipping the NullView occurs if the match fails.</span>
<a name="line-147"></a><span class='hs-definition'>preferNullViews</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>NullView</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-148"></a><span class='hs-definition'>preferNullViews</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>win</span>
<a name="line-149"></a><span class='hs-definition'>preferNullViews</span> <span class='hs-varid'>nvs</span> <span class='hs-varid'>win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl'</span> <span class='hs-layout'>(</span><span class='hs-varid'>dominate</span> <span class='hs-varid'>win</span><span class='hs-layout'>)</span> <span class='hs-varid'>win</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span> <span class='hs-varid'>cleanNullView</span> <span class='hs-varid'>nvs</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="dominate"></a><span class='hs-comment'>{-
<a name="line-152"></a>dominate is common to applyNullViews and preferNullViews above.
<a name="line-153"></a>
<a name="line-154"></a>Even I no longer understand it without study.
<a name="line-155"></a>
<a name="line-156"></a>Oversimplified: The last argument has a new set of tests "sti" that
<a name="line-157"></a>must be satisfied to then apply the new "tags" and reach the "win" QT.
<a name="line-158"></a>Failing any of this set of tests leads to the "lose" QT.
<a name="line-159"></a>
<a name="line-160"></a>Closer: The "win" may already have some other set of tests leading to
<a name="line-161"></a>various branches, this set is cached in winTests. And the "lose" may
<a name="line-162"></a>already have some other set of tests leading to various branches. The
<a name="line-163"></a>combination of "win" and "lose" and "sti" must check the union of
<a name="line-164"></a>these tests, which is "allTests".
<a name="line-165"></a>
<a name="line-166"></a>Detail: The merging is done by useTest, where the tests in sti divert
<a name="line-167"></a>losing to a branch of "lose" and winning to a branch of "win". Tests
<a name="line-168"></a>not in sti are unchanged (but the losing DoPa index might be added).
<a name="line-169"></a>-}</span>
<a name="line-170"></a><span class='hs-definition'>dominate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>SetTestInfo</span><span class='hs-layout'>,</span><span class='hs-conid'>WinTags</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-171"></a><span class='hs-definition'>dominate</span> <span class='hs-varid'>win</span> <span class='hs-varid'>lose</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>SetTestInfo</span> <span class='hs-varid'>sti</span><span class='hs-layout'>,</span><span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>"dominate "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-172"></a> <span class='hs-keyword'>let</span> <span class='hs-comment'>-- The winning states are reached through the SetTag</span>
<a name="line-173"></a> <span class='hs-varid'>win'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-varid'>tags</span> <span class='hs-varid'>win</span>
<a name="line-174"></a> <span class='hs-comment'>-- get the SetTestInfo </span>
<a name="line-175"></a> <span class='hs-varid'>winTests</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listTestInfo</span> <span class='hs-varid'>win</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mempty</span>
<a name="line-176"></a> <span class='hs-varid'>allTests</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>listTestInfo</span> <span class='hs-varid'>lose</span> <span class='hs-varop'>$</span> <span class='hs-varid'>winTests</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-layout'>(</span><span class='hs-conid'>EMap</span><span class='hs-varop'>.</span><span class='hs-varid'>keysSet</span> <span class='hs-varid'>sti</span><span class='hs-layout'>)</span>
<a name="line-177"></a> <span class='hs-comment'>-- The first and second arguments of useTest are sorted</span>
<a name="line-178"></a> <span class='hs-comment'>-- At all times the second argument of useTest is a subset of the first</span>
<a name="line-179"></a> <span class='hs-varid'>useTest</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>w</span> <span class='hs-comment'>-- no more dominating tests to fail to choose lose, so just choose win</span>
<a name="line-180"></a> <span class='hs-varid'>useTest</span> <span class='hs-layout'>(</span><span class='hs-varid'>aTest</span><span class='hs-conop'>:</span><span class='hs-varid'>tests</span><span class='hs-layout'>)</span> <span class='hs-varid'>allD</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>dTest</span><span class='hs-layout'>,</span><span class='hs-varid'>dopas</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-varid'>w</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span>
<a name="line-181"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>wA</span><span class='hs-layout'>,</span><span class='hs-varid'>wB</span><span class='hs-layout'>,</span><span class='hs-varid'>wD</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>branches</span> <span class='hs-varid'>w</span>
<a name="line-182"></a> <span class='hs-layout'>(</span><span class='hs-varid'>lA</span><span class='hs-layout'>,</span><span class='hs-varid'>lB</span><span class='hs-layout'>,</span><span class='hs-varid'>lD</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>branches</span> <span class='hs-varid'>l</span>
<a name="line-183"></a> <span class='hs-varid'>branches</span> <span class='hs-varid'>qt</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>aTest</span><span class='hs-varop'>==</span><span class='hs-varid'>qt_test</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_a</span> <span class='hs-varid'>qt</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-varid'>qt</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span>
<a name="line-184"></a> <span class='hs-varid'>branches</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt</span><span class='hs-layout'>,</span><span class='hs-varid'>qt</span><span class='hs-layout'>,</span><span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-185"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>aTest</span> <span class='hs-varop'>==</span> <span class='hs-varid'>dTest</span>
<a name="line-186"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>aTest</span>
<a name="line-187"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>dopas</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>wD</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>lD</span>
<a name="line-188"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>useTest</span> <span class='hs-varid'>tests</span> <span class='hs-varid'>ds</span> <span class='hs-varid'>wA</span> <span class='hs-varid'>lA</span>
<a name="line-189"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lB</span><span class='hs-layout'>}</span>
<a name="line-190"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>aTest</span>
<a name="line-191"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wD</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>lD</span>
<a name="line-192"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>useTest</span> <span class='hs-varid'>tests</span> <span class='hs-varid'>allD</span> <span class='hs-varid'>wA</span> <span class='hs-varid'>lA</span>
<a name="line-193"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>useTest</span> <span class='hs-varid'>tests</span> <span class='hs-varid'>allD</span> <span class='hs-varid'>wB</span> <span class='hs-varid'>lB</span><span class='hs-layout'>}</span>
<a name="line-194"></a> <span class='hs-varid'>useTest</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>err</span> <span class='hs-str'>"This case in dominate.useText cannot happen: second argument would have to have been null and that is checked before this case"</span>
<a name="line-195"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>useTest</span> <span class='hs-layout'>(</span><span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>toList</span> <span class='hs-varid'>allTests</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>EMap</span><span class='hs-varop'>.</span><span class='hs-varid'>assocs</span> <span class='hs-varid'>sti</span><span class='hs-layout'>)</span> <span class='hs-varid'>win'</span> <span class='hs-varid'>lose</span>
<a name="line-196"></a>
<a name="line-197"></a><a name="applyTest"></a><span class='hs-comment'>-- 'applyTest' is only used by addTest</span>
<a name="line-198"></a><span class='hs-comment'>-- 2009: maybe need to keep track of whether a change is actually made</span>
<a name="line-199"></a><span class='hs-comment'>-- (beyond DoPa tracking) to the QT.</span>
<a name="line-200"></a><span class='hs-definition'>applyTest</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TestInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-201"></a><span class='hs-definition'>applyTest</span> <span class='hs-layout'>(</span><span class='hs-varid'>wt</span><span class='hs-layout'>,</span><span class='hs-varid'>dopa</span><span class='hs-layout'>)</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullQT</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qt</span>
<a name="line-202"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>applyTest'</span> <span class='hs-varid'>qt</span> <span class='hs-keyword'>where</span>
<a name="line-203"></a> <span class='hs-varid'>applyTest'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-204"></a> <span class='hs-varid'>applyTest'</span> <span class='hs-varid'>q</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-205"></a> <span class='hs-varid'>mkTesting</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wt</span>
<a name="line-206"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>dopa</span>
<a name="line-207"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q</span>
<a name="line-208"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qtlose</span><span class='hs-layout'>}</span>
<a name="line-209"></a> <span class='hs-varid'>applyTest'</span> <span class='hs-varid'>q</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>wt'</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-210"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>compare</span> <span class='hs-varid'>wt</span> <span class='hs-varid'>wt'</span> <span class='hs-keyword'>of</span>
<a name="line-211"></a> <span class='hs-conid'>LT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wt</span>
<a name="line-212"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>dopa</span>
<a name="line-213"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q</span>
<a name="line-214"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qtlose</span><span class='hs-layout'>}</span>
<a name="line-215"></a> <span class='hs-conid'>EQ</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>dopa</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_dopas</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span>
<a name="line-216"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qtlose</span><span class='hs-layout'>}</span>
<a name="line-217"></a> <span class='hs-conid'>GT</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>q</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>applyTest'</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_a</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span>
<a name="line-218"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>applyTest'</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_b</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-219"></a>
<a name="line-220"></a><a name="mergeQT_2nd"></a><span class='hs-comment'>-- Three ways to merge a pair of QT's varying how winning transitions</span>
<a name="line-221"></a><span class='hs-comment'>-- are handled.</span>
<a name="line-222"></a><span class='hs-comment'>--</span>
<a name="line-223"></a><span class='hs-comment'>-- mergeQT_2nd is used by the NonEmpty case and always discards the</span>
<a name="line-224"></a><span class='hs-comment'>-- first argument's win and uses the second argment's win.</span>
<a name="line-225"></a><span class='hs-comment'>--</span>
<a name="line-226"></a><span class='hs-comment'>-- mergeAltQT is used by the Or cases and is biased to the first</span>
<a name="line-227"></a><span class='hs-comment'>-- argument's winning transition, if present.</span>
<a name="line-228"></a><span class='hs-comment'>--</span>
<a name="line-229"></a><span class='hs-comment'>-- mergeQT is used by Star and mergeE and combines the winning</span>
<a name="line-230"></a><span class='hs-comment'>-- transitions (concatenating the instructions).</span>
<a name="line-231"></a><span class='hs-definition'>mergeQT_2nd</span><span class='hs-layout'>,</span><span class='hs-varid'>mergeAltQT</span><span class='hs-layout'>,</span><span class='hs-varid'>mergeQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-232"></a><span class='hs-definition'>mergeQT_2nd</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullQT</span> <span class='hs-varid'>q1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q2</span>
<a name="line-233"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQTWith</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-varid'>w2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>w2</span><span class='hs-layout'>)</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span>
<a name="line-234"></a>
<a name="line-235"></a><a name="mergeAltQT"></a><span class='hs-definition'>mergeAltQT</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullQT</span> <span class='hs-varid'>q1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q2</span> <span class='hs-comment'>-- prefer winning with w1 then with w2</span>
<a name="line-236"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQTWith</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>w1</span> <span class='hs-varid'>w2</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>noWin</span> <span class='hs-varid'>w1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>w2</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>w1</span><span class='hs-layout'>)</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span>
<a name="line-237"></a><a name="mergeQT"></a><span class='hs-definition'>mergeQT</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullQT</span> <span class='hs-varid'>q1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q2</span> <span class='hs-comment'>-- union wins</span>
<a name="line-238"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullQT</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>q1</span> <span class='hs-comment'>-- union wins</span>
<a name="line-239"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQTWith</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-comment'>-- no preference, win with combined SetTag XXX is the wrong thing! "(.?)*"</span>
<a name="line-240"></a>
<a name="line-241"></a><a name="mergeQTWith"></a><span class='hs-comment'>-- This takes a function which implements a policy on mergining</span>
<a name="line-242"></a><span class='hs-comment'>-- winning transitions and then merges all the transitions. It opens</span>
<a name="line-243"></a><span class='hs-comment'>-- the CharMap newtype for more efficient operation, then rewraps it.</span>
<a name="line-244"></a><span class='hs-definition'>mergeQTWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>WinTags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WinTags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WinTags</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-245"></a><span class='hs-definition'>mergeQTWith</span> <span class='hs-varid'>mergeWins</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>merge</span> <span class='hs-keyword'>where</span>
<a name="line-246"></a> <span class='hs-varid'>merge</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-247"></a> <span class='hs-varid'>merge</span> <span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-varid'>w1</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>o1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-varid'>w2</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>o2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-248"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>w'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeWins</span> <span class='hs-varid'>w1</span> <span class='hs-varid'>w2</span>
<a name="line-249"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fuseQTrans</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>o1</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>o2</span>
<a name="line-250"></a> <span class='hs-varid'>o'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>o1</span> <span class='hs-varid'>o2</span>
<a name="line-251"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Simple</span> <span class='hs-varid'>w'</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>o'</span>
<a name="line-252"></a> <span class='hs-varid'>merge</span> <span class='hs-varid'>t1</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-varid'>s2</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkTesting</span> <span class='hs-varop'>$</span>
<a name="line-253"></a> <span class='hs-varid'>t1</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>b1</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-254"></a> <span class='hs-varid'>merge</span> <span class='hs-varid'>s1</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>t2</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkTesting</span> <span class='hs-varop'>$</span>
<a name="line-255"></a> <span class='hs-varid'>t2</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>a2</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-256"></a> <span class='hs-varid'>merge</span> <span class='hs-varid'>t1</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-varid'>wt1</span> <span class='hs-varid'>ds1</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-varid'>t2</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-varid'>wt2</span> <span class='hs-varid'>ds2</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkTesting</span> <span class='hs-varop'>$</span>
<a name="line-257"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>compare</span> <span class='hs-varid'>wt1</span> <span class='hs-varid'>wt2</span> <span class='hs-keyword'>of</span>
<a name="line-258"></a> <span class='hs-conid'>LT</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t1</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>t2</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>b1</span> <span class='hs-varid'>t2</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-259"></a> <span class='hs-conid'>EQ</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_test</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>wt1</span> <span class='hs-comment'>-- same as wt2</span>
<a name="line-260"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_dopas</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>ds1</span> <span class='hs-varid'>ds2</span>
<a name="line-261"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>merge</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span>
<a name="line-262"></a> <span class='hs-layout'>,</span><span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>merge</span> <span class='hs-varid'>b1</span> <span class='hs-varid'>b2</span><span class='hs-layout'>}</span>
<a name="line-263"></a> <span class='hs-conid'>GT</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t2</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_a</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>a2</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span><span class='hs-keyglyph'>=</span><span class='hs-layout'>(</span><span class='hs-varid'>merge</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span><span class='hs-layout'>}</span>
<a name="line-264"></a>
<a name="line-265"></a> <span class='hs-varid'>fuseQTrans</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>CharMap</span> <span class='hs-conid'>QTrans</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QTrans</span>
<a name="line-266"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CharMap</span> <span class='hs-conid'>QTrans</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QTrans</span>
<a name="line-267"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharMap</span> <span class='hs-conid'>QTrans</span>
<a name="line-268"></a> <span class='hs-varid'>fuseQTrans</span> <span class='hs-layout'>(</span><span class='hs-conid'>CharMap</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-varid'>o1</span> <span class='hs-layout'>(</span><span class='hs-conid'>CharMap</span> <span class='hs-varid'>t2</span><span class='hs-layout'>)</span> <span class='hs-varid'>o2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CharMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromDistinctAscList</span> <span class='hs-layout'>(</span><span class='hs-varid'>fuse</span> <span class='hs-varid'>l1</span> <span class='hs-varid'>l2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-269"></a> <span class='hs-varid'>l1</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span> <span class='hs-varid'>t1</span>
<a name="line-270"></a> <span class='hs-varid'>l2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span> <span class='hs-varid'>t2</span>
<a name="line-271"></a> <span class='hs-varid'>fuse</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapSnd</span> <span class='hs-layout'>(</span><span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>o1</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span>
<a name="line-272"></a> <span class='hs-varid'>fuse</span> <span class='hs-varid'>x</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapSnd</span> <span class='hs-layout'>(</span><span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>o2</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-273"></a> <span class='hs-varid'>fuse</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>xc</span><span class='hs-layout'>,</span><span class='hs-varid'>xa</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>yc</span><span class='hs-layout'>,</span><span class='hs-varid'>ya</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>ys</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-274"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>compare</span> <span class='hs-varid'>xc</span> <span class='hs-varid'>yc</span> <span class='hs-keyword'>of</span>
<a name="line-275"></a> <span class='hs-conid'>LT</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>xc</span><span class='hs-layout'>,</span><span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>xa</span> <span class='hs-varid'>o2</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>fuse</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>y</span>
<a name="line-276"></a> <span class='hs-conid'>EQ</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>xc</span><span class='hs-layout'>,</span><span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>xa</span> <span class='hs-varid'>ya</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>fuse</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span>
<a name="line-277"></a> <span class='hs-conid'>GT</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>yc</span><span class='hs-layout'>,</span><span class='hs-varid'>mergeQTrans</span> <span class='hs-varid'>o1</span> <span class='hs-varid'>ya</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>fuse</span> <span class='hs-varid'>x</span> <span class='hs-varid'>ys</span>
<a name="line-278"></a>
<a name="line-279"></a> <span class='hs-varid'>mergeQTrans</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QTrans</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QTrans</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QTrans</span>
<a name="line-280"></a> <span class='hs-varid'>mergeQTrans</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>unionWith</span> <span class='hs-varid'>mappend</span>
<a name="line-281"></a>
<a name="line-282"></a><span class='hs-comment'>-- Note: There are no append* operations. There are only these</span>
<a name="line-283"></a><span class='hs-comment'>-- prepend* operations because things are only prepended to the future</span>
<a name="line-284"></a><span class='hs-comment'>-- continuation. And the ordering is significant.</span>
<a name="line-285"></a>
<a name="line-286"></a><a name="prependPreTag"></a><span class='hs-comment'>-- This is only used in inStar/nullable</span>
<a name="line-287"></a><span class='hs-definition'>prependPreTag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-288"></a><span class='hs-definition'>prependPreTag</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qt</span>
<a name="line-289"></a><span class='hs-definition'>prependPreTag</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-conid'>TagTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>qt</span>
<a name="line-290"></a>
<a name="line-291"></a><a name="prependGroupResets"></a><span class='hs-definition'>prependGroupResets</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-292"></a><span class='hs-definition'>prependGroupResets</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qt</span>
<a name="line-293"></a><span class='hs-definition'>prependGroupResets</span> <span class='hs-varid'>tags</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-conid'>ResetGroupStopTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>tag</span><span class='hs-keyglyph'><-</span><span class='hs-varid'>tags</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>qt</span>
<a name="line-294"></a>
<a name="line-295"></a><a name="prependTags'"></a><span class='hs-definition'>prependTags'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TagList</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-296"></a><span class='hs-definition'>prependTags'</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qt</span>
<a name="line-297"></a><span class='hs-definition'>prependTags'</span> <span class='hs-varid'>tcs'</span> <span class='hs-varid'>qt</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Testing</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qt</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-varid'>tcs'</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_a</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span>
<a name="line-298"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>qt_b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-varid'>tcs'</span> <span class='hs-layout'>(</span><span class='hs-varid'>qt_b</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-299"></a><span class='hs-definition'>prependTags'</span> <span class='hs-varid'>tcs'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span><span class='hs-varid'>qt_win</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_trans</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span><span class='hs-varid'>qt_other</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>o</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-300"></a> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>noWin</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>w</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>tcs'</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>w</span>
<a name="line-301"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>map</span> <span class='hs-varid'>prependQTrans</span> <span class='hs-varid'>t</span>
<a name="line-302"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependQTrans</span> <span class='hs-varid'>o</span> <span class='hs-layout'>}</span>
<a name="line-303"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>prependQTrans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-layout'>,</span><span class='hs-varid'>tcs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-layout'>,</span><span class='hs-varid'>tcs'</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>tcs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-304"></a>
<a name="line-305"></a><span class='hs-comment'>-- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == </span>
<a name="line-306"></a><span class='hs-comment'>-- define type S which is a State monad, this allows the creation of the uniq QNFA ids and storing the QNFA</span>
<a name="line-307"></a><span class='hs-comment'>-- in an ascending order difference list for later placement in an array.</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="S"></a><span class='hs-comment'>-- Type of State monad used inside qToNFA</span>
<a name="line-310"></a><a name="S"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>S</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>State</span> <span class='hs-layout'>(</span><span class='hs-conid'>Index</span> <span class='hs-comment'>-- Next available QNFA index</span>
<a name="line-311"></a> <span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Index</span><span class='hs-layout'>,</span><span class='hs-conid'>QNFA</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Index</span><span class='hs-layout'>,</span><span class='hs-conid'>QNFA</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- DList of previous QNFAs</span>
<a name="line-312"></a>
<a name="line-313"></a><a name="E"></a><span class='hs-comment'>-- Type of continuation of the NFA, not much more complicated</span>
<a name="line-314"></a><a name="E"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span> <span class='hs-comment'>-- Things to do before the Either QNFA QT</span>
<a name="line-315"></a> <span class='hs-comment'>-- with OneChar these become PostUpdate otherwise they become PreUpdate</span>
<a name="line-316"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Either</span> <span class='hs-conid'>QNFA</span> <span class='hs-conid'>QT</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- The future, packaged in the best way</span>
<a name="line-317"></a>
<a name="line-318"></a><a name="ActCont"></a><span class='hs-comment'>-- See documentation below before the 'act' function. This is for use inside a Star pattern.</span>
<a name="line-319"></a><a name="ActCont"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-conid'>E</span> <span class='hs-comment'>-- The eLoop is the dangerous recursive reference to continuation</span>
<a name="line-320"></a> <span class='hs-comment'>-- future that loops while accepting zero more characters</span>
<a name="line-321"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>E</span> <span class='hs-comment'>-- This holds the safe non-zero-character accepting continuation</span>
<a name="line-322"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-conid'>QNFA</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- optimized merger of the above, used only inside act, to avoid orphan QNFA id values</span>
<a name="line-323"></a>
<a name="line-324"></a><a name="newQNFA"></a><span class='hs-comment'>-- newQNFA is the only operation that actually uses the monad get and put operations</span>
<a name="line-325"></a><span class='hs-definition'>newQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>QNFA</span>
<a name="line-326"></a><span class='hs-definition'>newQNFA</span> <span class='hs-varid'>s</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-327"></a> <span class='hs-layout'>(</span><span class='hs-varid'>thisI</span><span class='hs-layout'>,</span><span class='hs-varid'>oldQs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>get</span>
<a name="line-328"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>futureI</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>succ</span> <span class='hs-varid'>thisI</span> <span class='hs-keyword'>in</span> <span class='hs-varid'>seq</span> <span class='hs-varid'>futureI</span> <span class='hs-varop'>$</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">newQNFA< "</span><span class='hs-varop'>++</span><span class='hs-varid'>s</span><span class='hs-varop'>++</span><span class='hs-str'>" : "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>thisI</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-329"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>qnfa</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkQNFA</span> <span class='hs-varid'>thisI</span> <span class='hs-varid'>qt</span> <span class='hs-comment'>-- (strictQT qt) -- making strictQNFA kills test (1,11) ZZZ</span>
<a name="line-330"></a> <span class='hs-varid'>put</span> <span class='hs-varop'>$!</span> <span class='hs-layout'>(</span><span class='hs-varid'>futureI</span><span class='hs-layout'>,</span> <span class='hs-varid'>oldQs</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>thisI</span><span class='hs-layout'>,</span><span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-331"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>qnfa</span>
<a name="line-332"></a>
<a name="line-333"></a><span class='hs-comment'>-- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == </span>
<a name="line-334"></a><span class='hs-comment'>-- E related functions</span>
<a name="line-335"></a>
<a name="line-336"></a><a name="fromQNFA"></a><span class='hs-definition'>fromQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QNFA</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-337"></a><span class='hs-definition'>fromQNFA</span> <span class='hs-varid'>qnfa</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span>
<a name="line-338"></a>
<a name="line-339"></a><a name="fromQT"></a><span class='hs-definition'>fromQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-340"></a><span class='hs-definition'>fromQT</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-conid'>Right</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span>
<a name="line-341"></a>
<a name="line-342"></a><a name="asQNFA"></a><span class='hs-comment'>-- Promises the output will match (_,Left _), used by Or cases when any branch wants a QNFA continuation</span>
<a name="line-343"></a><span class='hs-definition'>asQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>E</span>
<a name="line-344"></a><span class='hs-definition'>asQNFA</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-345"></a><span class='hs-definition'>asQNFA</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-conid'>Right</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>qnfa</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newQNFA</span> <span class='hs-varid'>s</span> <span class='hs-varid'>qt</span> <span class='hs-comment'>-- YYY Policy choice: leave the tags</span>
<a name="line-346"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span>
<a name="line-347"></a>
<a name="line-348"></a><a name="getQNFA"></a><span class='hs-comment'>-- Convert continuation E into a QNFA, only done at "top level" by qToNFA to get unique start state</span>
<a name="line-349"></a><span class='hs-definition'>getQNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>QNFA</span>
<a name="line-350"></a><span class='hs-definition'>getQNFA</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span><span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>qnfa</span>
<a name="line-351"></a><span class='hs-definition'>getQNFA</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newQNFA</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>prependTags'</span> <span class='hs-layout'>(</span><span class='hs-varid'>promoteTasks</span> <span class='hs-conid'>PreUpdate</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>q_qt</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-352"></a><span class='hs-definition'>getQNFA</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-conid'>Right</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newQNFA</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>prependTags'</span> <span class='hs-layout'>(</span><span class='hs-varid'>promoteTasks</span> <span class='hs-conid'>PreUpdate</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-varid'>qt</span><span class='hs-layout'>)</span>
<a name="line-353"></a>
<a name="line-354"></a><a name="getQT"></a><span class='hs-comment'>-- Extract the QT from the E</span>
<a name="line-355"></a><span class='hs-definition'>getQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-356"></a><span class='hs-definition'>getQT</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>prependTags'</span> <span class='hs-layout'>(</span><span class='hs-varid'>promoteTasks</span> <span class='hs-conid'>PreUpdate</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>either</span> <span class='hs-varid'>q_qt</span> <span class='hs-varid'>id</span> <span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-357"></a>
<a name="line-358"></a><a name="addTest"></a><span class='hs-comment'>-- 2009: This looks realllly dodgy, since it can convert a QNFA/Testing to a QT/Testing</span>
<a name="line-359"></a><span class='hs-comment'>-- without actually achieving anything except adding a DoPa to the Testing. A diagnostic</span>
<a name="line-360"></a><span class='hs-comment'>-- series of runs might be needed to decide if this ever creates orphan id numbers.</span>
<a name="line-361"></a><span class='hs-comment'>-- Then applyTest might need to keep track of whether it actually changes anything.</span>
<a name="line-362"></a><span class='hs-definition'>addTest</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TestInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-363"></a><span class='hs-definition'>addTest</span> <span class='hs-varid'>ti</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span> <span class='hs-conid'>Right</span> <span class='hs-varop'>.</span> <span class='hs-varid'>applyTest</span> <span class='hs-varid'>ti</span> <span class='hs-varop'>.</span> <span class='hs-varid'>either</span> <span class='hs-varid'>q_qt</span> <span class='hs-varid'>id</span> <span class='hs-varop'>$</span> <span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-364"></a>
<a name="line-365"></a><a name="promoteTasks"></a><span class='hs-comment'>-- This is used only with PreUpdate and PostUpdate as the first argument.</span>
<a name="line-366"></a><span class='hs-definition'>promoteTasks</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTask</span><span class='hs-keyglyph'>-></span><span class='hs-conid'>TagUpdate</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TagTasks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TagList</span>
<a name="line-367"></a><span class='hs-definition'>promoteTasks</span> <span class='hs-varid'>promote</span> <span class='hs-varid'>tags</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-varid'>task</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-varid'>promote</span> <span class='hs-varid'>task</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>tags</span>
<a name="line-368"></a>
<a name="line-369"></a><a name="demoteTags"></a><span class='hs-comment'>-- only used in addWinTags</span>
<a name="line-370"></a><span class='hs-definition'>demoteTags</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TagList</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TagTasks</span>
<a name="line-371"></a><span class='hs-definition'>demoteTags</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>helper</span>
<a name="line-372"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>helper</span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-varid'>tt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-varid'>tt</span><span class='hs-layout'>)</span>
<a name="line-373"></a> <span class='hs-varid'>helper</span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PostUpdate</span> <span class='hs-varid'>tt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-varid'>tt</span><span class='hs-layout'>)</span>
<a name="line-374"></a>
<a name="line-375"></a><a name="addWinTags"></a><span class='hs-comment'>-- This is polymorphic so addWinTags can be cute below</span>
<a name="line-376"></a><span class='hs-comment'>{-# INLINE addWinTags #-}</span>
<a name="line-377"></a><span class='hs-definition'>addWinTags</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WinTags</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-378"></a><span class='hs-definition'>addWinTags</span> <span class='hs-varid'>wtags</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>demoteTags</span> <span class='hs-varid'>wtags</span> <span class='hs-varop'>`mappend`</span> <span class='hs-varid'>tags</span>
<a name="line-379"></a> <span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-380"></a>
<a name="line-381"></a><a name="addTag'"></a><span class='hs-comment'>{-# INLINE addTag' #-}</span>
<a name="line-382"></a><span class='hs-comment'>-- This is polymorphic so addTagAC can be cute below</span>
<a name="line-383"></a><span class='hs-definition'>addTag'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-384"></a><span class='hs-definition'>addTag'</span> <span class='hs-varid'>tag</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>TagTask</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>tags</span>
<a name="line-385"></a> <span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-386"></a>
<a name="line-387"></a><a name="addTag"></a><span class='hs-comment'>-- a Maybe version of addTag' above, specializing 'a' to Either QNFA QT</span>
<a name="line-388"></a><span class='hs-definition'>addTag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-389"></a><span class='hs-definition'>addTag</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-390"></a><span class='hs-definition'>addTag</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addTag'</span> <span class='hs-varid'>tag</span> <span class='hs-varid'>e</span>
<a name="line-391"></a>
<a name="line-392"></a><a name="addGroupResets"></a><span class='hs-comment'>{-# INLINE addGroupResets #-}</span>
<a name="line-393"></a><span class='hs-comment'>-- This is polymorphic so addGroupResetsAC can be cute below</span>
<a name="line-394"></a><span class='hs-definition'>addGroupResets</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-395"></a><span class='hs-definition'>addGroupResets</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-396"></a><span class='hs-definition'>addGroupResets</span> <span class='hs-varid'>tags</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags'</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varid'>tags'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>ResetGroupStopTask</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>tags</span>
<a name="line-397"></a> <span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-398"></a>
<a name="line-399"></a><a name="addGroupSets"></a><span class='hs-definition'>addGroupSets</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>TagTasks</span><span class='hs-layout'>,</span><span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-400"></a><span class='hs-definition'>addGroupSets</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-401"></a><span class='hs-definition'>addGroupSets</span> <span class='hs-varid'>tags</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags'</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varid'>tags'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>SetGroupStopTask</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>tags</span>
<a name="line-402"></a> <span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span>
<a name="line-403"></a>
<a name="line-404"></a><a name="getE"></a><span class='hs-comment'>-- Consume an ActCont. Uses the mergeQT form to combine non-accepting</span>
<a name="line-405"></a><span class='hs-comment'>-- and accepting view of the continuation.</span>
<a name="line-406"></a><span class='hs-definition'>getE</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-407"></a><span class='hs-definition'>getE</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- consume optimized mQNFA value returned by Star</span>
<a name="line-408"></a><span class='hs-definition'>getE</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-conid'>Just</span> <span class='hs-varid'>accepting</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromQT</span> <span class='hs-layout'>(</span><span class='hs-varid'>mergeQT</span> <span class='hs-layout'>(</span><span class='hs-varid'>getQT</span> <span class='hs-varid'>eLoop</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>getQT</span> <span class='hs-varid'>accepting</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-409"></a><span class='hs-definition'>getE</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eLoop</span>
<a name="line-410"></a>
<a name="line-411"></a><a name="addTestAC"></a><span class='hs-comment'>-- 2009: See coment for addTest. Here is a case where the third component might be a (Just qnfa) and it</span>
<a name="line-412"></a><span class='hs-comment'>-- is being lost even though the added test might be redundant.</span>
<a name="line-413"></a><span class='hs-definition'>addTestAC</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TestInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span>
<a name="line-414"></a><span class='hs-definition'>addTestAC</span> <span class='hs-varid'>ti</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>mE</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTest</span> <span class='hs-varid'>ti</span> <span class='hs-varid'>e</span>
<a name="line-415"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTest</span> <span class='hs-varid'>ti</span><span class='hs-layout'>)</span> <span class='hs-varid'>mE</span>
<a name="line-416"></a> <span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-417"></a>
<a name="line-418"></a><span class='hs-comment'>-- These are AC versions of the add functions on E</span>
<a name="line-419"></a>
<a name="line-420"></a><a name="addTagAC"></a><span class='hs-definition'>addTagAC</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span>
<a name="line-421"></a><span class='hs-definition'>addTagAC</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ac</span>
<a name="line-422"></a><span class='hs-definition'>addTagAC</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>mE</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTag'</span> <span class='hs-varid'>tag</span> <span class='hs-varid'>e</span>
<a name="line-423"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTag'</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-varid'>mE</span>
<a name="line-424"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTag'</span> <span class='hs-varid'>tag</span><span class='hs-layout'>)</span> <span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span>
<a name="line-425"></a>
<a name="line-426"></a><a name="addGroupResetsAC"></a><span class='hs-definition'>addGroupResetsAC</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span>
<a name="line-427"></a><span class='hs-definition'>addGroupResetsAC</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ac</span>
<a name="line-428"></a><span class='hs-definition'>addGroupResetsAC</span> <span class='hs-varid'>tags</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>mE</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>tags</span> <span class='hs-varid'>e</span>
<a name="line-429"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mE</span>
<a name="line-430"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span>
<a name="line-431"></a>
<a name="line-432"></a><a name="addGroupSetsAC"></a><span class='hs-definition'>addGroupSetsAC</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span>
<a name="line-433"></a><span class='hs-definition'>addGroupSetsAC</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ac</span>
<a name="line-434"></a><span class='hs-definition'>addGroupSetsAC</span> <span class='hs-varid'>tags</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>mE</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>tags</span> <span class='hs-varid'>e</span>
<a name="line-435"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mE</span>
<a name="line-436"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>tags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span>
<a name="line-437"></a>
<a name="line-438"></a><a name="addWinTagsAC"></a><span class='hs-definition'>addWinTagsAC</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>WinTags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span>
<a name="line-439"></a><span class='hs-definition'>addWinTagsAC</span> <span class='hs-varid'>wtags</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-varid'>mE</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTags</span> <span class='hs-varid'>wtags</span> <span class='hs-varid'>e</span>
<a name="line-440"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTags</span> <span class='hs-varid'>wtags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mE</span>
<a name="line-441"></a> <span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTags</span> <span class='hs-varid'>wtags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span>
<a name="line-442"></a><span class='hs-comment'>-- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == -- == </span>
<a name="line-443"></a>
<a name="line-444"></a><a name="qToNFA"></a><span class='hs-comment'>-- Initial preTag of 0th tag is implied. No other general pre-tags would be expected.</span>
<a name="line-445"></a><span class='hs-comment'>-- The qtwin contains the preTag of the 1st tag and is only set when a match is completed.</span>
<a name="line-446"></a><span class='hs-comment'>-- The fst Index is the index of the unique starting QNFA state.</span>
<a name="line-447"></a><span class='hs-comment'>-- The snd (Array Index QNFA) is all the QNFA states.</span>
<a name="line-448"></a><span class='hs-comment'>--</span>
<a name="line-449"></a><span class='hs-comment'>-- In the cases below, Empty is handled much like a Test with no TestInfo.</span>
<a name="line-450"></a><span class='hs-definition'>qToNFA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CompOption</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Index</span><span class='hs-layout'>,</span><span class='hs-conid'>Array</span> <span class='hs-conid'>Index</span> <span class='hs-conid'>QNFA</span><span class='hs-layout'>)</span>
<a name="line-451"></a><span class='hs-definition'>qToNFA</span> <span class='hs-varid'>compOpt</span> <span class='hs-varid'>qTop</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>q_id</span> <span class='hs-varid'>startingQNFA</span>
<a name="line-452"></a> <span class='hs-layout'>,</span><span class='hs-varid'>array</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-varid'>pred</span> <span class='hs-varid'>lastIndex</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>table</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-453"></a> <span class='hs-comment'>-- Result startingQNFA is the top level's index</span>
<a name="line-454"></a> <span class='hs-comment'>-- State pair: fst 0 is the next state number (not yet used) going in, and lastIndex coming out (succ of last used)</span>
<a name="line-455"></a> <span class='hs-comment'>-- snd id is the difference list of states going in, and the finished list coming out</span>
<a name="line-456"></a> <span class='hs-layout'>(</span><span class='hs-varid'>startingQNFA</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-varid'>lastIndex</span><span class='hs-layout'>,</span><span class='hs-varid'>table</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-457"></a> <span class='hs-varid'>runState</span> <span class='hs-layout'>(</span><span class='hs-varid'>getTrans</span> <span class='hs-varid'>qTop</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>qtwin</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>getQNFA</span> <span class='hs-str'>"top level"</span><span class='hs-layout'>)</span> <span class='hs-varid'>startState</span>
<a name="line-458"></a> <span class='hs-varid'>startState</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-varid'>id</span><span class='hs-layout'>)</span>
<a name="line-459"></a>
<a name="line-460"></a> <span class='hs-varid'>getTrans</span><span class='hs-layout'>,</span><span class='hs-varid'>getTransTagless</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>E</span>
<a name="line-461"></a> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>qIn</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>preReset</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>resets</span><span class='hs-layout'>,</span><span class='hs-varid'>postSet</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>sets</span><span class='hs-layout'>,</span><span class='hs-varid'>preTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span><span class='hs-varid'>postTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>post</span><span class='hs-layout'>,</span><span class='hs-varid'>unQ</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>pIn</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< getTrans "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-462"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pIn</span> <span class='hs-keyword'>of</span>
<a name="line-463"></a> <span class='hs-comment'>-- The case below is the ultimate consumer of every single OneChar in the input and the only caller of</span>
<a name="line-464"></a> <span class='hs-comment'>-- newTrans/acceptTrans which is the sole source of QT/Simple nodes.</span>
<a name="line-465"></a> <span class='hs-conid'>OneChar</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>newTrans</span> <span class='hs-str'>"getTrans/OneChar"</span> <span class='hs-varid'>resets</span> <span class='hs-varid'>pre</span> <span class='hs-varid'>pat</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span>
<a name="line-466"></a> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span>
<a name="line-467"></a> <span class='hs-conid'>Test</span> <span class='hs-varid'>ti</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTest</span> <span class='hs-varid'>ti</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span>
<a name="line-468"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResets</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTag</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getTransTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTag</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-469"></a>
<a name="line-470"></a> <span class='hs-varid'>getTransTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< getTransTagless "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-471"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unQ</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-472"></a> <span class='hs-conid'>Seq</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q1</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q2</span> <span class='hs-varid'>e</span>
<a name="line-473"></a> <span class='hs-conid'>Or</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>e</span>
<a name="line-474"></a> <span class='hs-conid'>Or</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>q</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q</span> <span class='hs-varid'>e</span>
<a name="line-475"></a> <span class='hs-conid'>Or</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-476"></a> <span class='hs-varid'>eqts</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>usesQNFA</span> <span class='hs-varid'>qIn</span>
<a name="line-477"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
<a name="line-478"></a> <span class='hs-varid'>eQNFA</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asQNFA</span> <span class='hs-str'>"getTransTagless/Or/usesQNFA"</span> <span class='hs-varid'>e</span>
<a name="line-479"></a> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q</span> <span class='hs-varid'>eQNFA</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>]</span>
<a name="line-480"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>]</span>
<a name="line-481"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>qts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>getQT</span> <span class='hs-varid'>eqts</span>
<a name="line-482"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr1</span> <span class='hs-varid'>mergeAltQT</span> <span class='hs-varid'>qts</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-483"></a>
<a name="line-484"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varid'>mayFirstBeNull</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span>
<a name="line-485"></a> <span class='hs-comment'>-- mOrbit of Just implies varies q and childGroups q</span>
<a name="line-486"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>e'</span><span class='hs-layout'>,</span><span class='hs-varid'>clear</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-comment'>-- debug ("\n>"++show e++"\n"++show q++"\n<") $</span>
<a name="line-487"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>notNullable</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- subpattern cannot be null</span>
<a name="line-488"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isNothing</span> <span class='hs-varid'>mOrbit</span>
<a name="line-489"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>of</span>
<a name="line-490"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-conid'>True</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- True because null of subpattern is same as skipping subpattern</span>
<a name="line-491"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>tagList</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTags</span> <span class='hs-varid'>tagList</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- null of subpattern NOT same as skipping</span>
<a name="line-492"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>preferNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- is NOT same as skipping</span>
<a name="line-493"></a> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>.</span> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-varid'>mOrbit</span> <span class='hs-comment'>-- resetOrbitsQT and enterOrbitQT commute</span>
<a name="line-494"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>preferNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>leaveOrbit</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- perform resets when accepting 0 characters</span>
<a name="line-495"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>cannotAccept</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>e'</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>mdo</span>
<a name="line-496"></a> <span class='hs-varid'>mqt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inStar</span> <span class='hs-varid'>q</span> <span class='hs-varid'>this</span>
<a name="line-497"></a> <span class='hs-layout'>(</span><span class='hs-varid'>this</span><span class='hs-layout'>,</span><span class='hs-varid'>ans</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mqt</span> <span class='hs-keyword'>of</span>
<a name="line-498"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"Weird pattern in getTransTagless/Star: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-499"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-500"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>qt'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>.</span> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>qt</span> <span class='hs-comment'>-- resetOrbitsQT and enterOrbitQT commute</span>
<a name="line-501"></a> <span class='hs-varid'>thisQT</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>qt'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>leaveOrbit</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span> <span class='hs-comment'>-- capture of subpattern or leave via next pattern (avoid null of subpattern on way out)</span>
<a name="line-502"></a> <span class='hs-varid'>ansE</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>qt'</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e'</span> <span class='hs-comment'>-- capture of subpattern or leave via null of subpattern</span>
<a name="line-503"></a> <span class='hs-varid'>thisE</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>usesQNFA</span> <span class='hs-varid'>q</span>
<a name="line-504"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQNFA</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>newQNFA</span> <span class='hs-str'>"getTransTagless/Star"</span> <span class='hs-varid'>thisQT</span>
<a name="line-505"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>thisQT</span>
<a name="line-506"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisE</span><span class='hs-layout'>,</span><span class='hs-varid'>ansE</span><span class='hs-layout'>)</span>
<a name="line-507"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>mayFirstBeNull</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>clear</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>this</span> <span class='hs-comment'>-- optimization to possibly preserve QNFA</span>
<a name="line-508"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>ans</span><span class='hs-layout'>)</span>
<a name="line-509"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>this</span><span class='hs-layout'>)</span>
<a name="line-510"></a>
<a name="line-511"></a> <span class='hs-comment'>{- NonEmpty is like actNullable (Or [Empty,q]) without the extra tag to prefer the first Empty branch -}</span>
<a name="line-512"></a> <span class='hs-conid'>NonEmpty</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ecart</span> <span class='hs-layout'>(</span><span class='hs-str'>"\n> getTransTagless/NonEmpty"</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-513"></a> <span class='hs-comment'>-- Assertion to check than Pattern.starTrans did its job right:</span>
<a name="line-514"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>cannotAccept</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"getTransTagless/NonEmpty : provided with a *cannotAccept* pattern: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-515"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>mustAccept</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"getTransTagless/NonEmpty : provided with a *mustAccept* pattern: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-516"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-517"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span>
<a name="line-518"></a> <span class='hs-conid'>Just</span> <span class='hs-sel'>_wtags</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-comment'>-- addWinTags wtags e XXX was duplicating tags</span>
<a name="line-519"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"getTransTagless/NonEmpty is supposed to have an emptyNull nullView : "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span>
<a name="line-520"></a> <span class='hs-varid'>mqt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inStar</span> <span class='hs-varid'>q</span> <span class='hs-varid'>e</span>
<a name="line-521"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mqt</span> <span class='hs-keyword'>of</span>
<a name="line-522"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"Weird pattern in getTransTagless/NonEmpty: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-523"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeQT_2nd</span> <span class='hs-varid'>qt</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e'</span> <span class='hs-comment'>-- ...and then this sets qt_win to exactly that of e'</span>
<a name="line-524"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"This case in Text.Regex.TNFA.TNFA.getTransTagless cannot happen"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-525"></a>
<a name="line-526"></a> <span class='hs-varid'>inStar</span><span class='hs-layout'>,</span><span class='hs-varid'>inStarNullableTagless</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>QT</span><span class='hs-layout'>)</span>
<a name="line-527"></a> <span class='hs-varid'>inStar</span> <span class='hs-varid'>qIn</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>preReset</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>resets</span><span class='hs-layout'>,</span><span class='hs-varid'>postSet</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>sets</span><span class='hs-layout'>,</span><span class='hs-varid'>preTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span><span class='hs-varid'>postTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>post</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>eLoop</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>notNullable</span> <span class='hs-varid'>qIn</span> <span class='hs-keyglyph'>=</span>
<a name="line-528"></a> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< inStar/1 "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-529"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>eLoop</span>
<a name="line-530"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span>
<a name="line-531"></a> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< inStar/2 "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-532"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>prependGroupResets</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>prependPreTag</span> <span class='hs-varid'>pre</span><span class='hs-layout'>)</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>inStarNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span><span class='hs-varid'>addTag</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSets</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>eLoop</span><span class='hs-layout'>)</span>
<a name="line-533"></a>
<a name="line-534"></a> <span class='hs-varid'>inStarNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>eLoop</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< inStarNullableTagless "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-535"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unQ</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-536"></a> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <span class='hs-comment'>-- with Or this discards () branch in "(^|foo|())*"</span>
<a name="line-537"></a> <span class='hs-conid'>Or</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span>
<a name="line-538"></a> <span class='hs-conid'>Or</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>q</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>inStar</span> <span class='hs-varid'>q</span> <span class='hs-varid'>eLoop</span>
<a name="line-539"></a> <span class='hs-conid'>Or</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-540"></a> <span class='hs-varid'>mqts</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>usesQNFA</span> <span class='hs-varid'>qIn</span>
<a name="line-541"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>eQNFA</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asQNFA</span> <span class='hs-str'>"inStarNullableTagless/Or/usesQNFA"</span> <span class='hs-varid'>eLoop</span>
<a name="line-542"></a> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>inStar</span> <span class='hs-varid'>q</span> <span class='hs-varid'>eQNFA</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>]</span>
<a name="line-543"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>inStar</span> <span class='hs-varid'>q</span> <span class='hs-varid'>eLoop</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>]</span>
<a name="line-544"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>qts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varid'>mqts</span>
<a name="line-545"></a> <span class='hs-varid'>mqt</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>qts</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr1</span> <span class='hs-varid'>mergeAltQT</span> <span class='hs-varid'>qts</span><span class='hs-layout'>)</span>
<a name="line-546"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>mqt</span>
<a name="line-547"></a> <span class='hs-comment'>-- Calls to act are inlined by hand to actNullable. This returns only cases where q1 or q2 or both</span>
<a name="line-548"></a> <span class='hs-comment'>-- accepted characters. The zero-character case is handled by the tag wrapping by inStar.</span>
<a name="line-549"></a> <span class='hs-comment'>-- 2009: Does this look dodgy and repetitios of tags? Seq by policy has no preTag or postTag.</span>
<a name="line-550"></a> <span class='hs-comment'>-- though it can have prependGroupResets, but those are not repeated in children so it is okay.</span>
<a name="line-551"></a> <span class='hs-conid'>Seq</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q1</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q2</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-552"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>getQT</span> <span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>)</span>
<a name="line-553"></a> <span class='hs-comment'>-- Calls to act are inlined by hand and are we losing the tags?</span>
<a name="line-554"></a> <span class='hs-conid'>Star</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>actNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-555"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>getQT</span> <span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>)</span>
<a name="line-556"></a> <span class='hs-conid'>NonEmpty</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ecart</span> <span class='hs-layout'>(</span><span class='hs-str'>"\n> inStarNullableTagless/NonEmpty"</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-557"></a> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>actNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-558"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>getQT</span> <span class='hs-varid'>meAcceptingOut</span><span class='hs-layout'>)</span>
<a name="line-559"></a> <span class='hs-conid'>Test</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <span class='hs-comment'>-- with Or this discards ^ branch in "(^|foo|())*"</span>
<a name="line-560"></a> <span class='hs-conid'>OneChar</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"OneChar cannot have nullable True"</span><span class='hs-layout'>)</span>
<a name="line-561"></a>
<a name="line-562"></a> <span class='hs-comment'>{- act* functions
<a name="line-563"></a>
<a name="line-564"></a> These have a very complicated state that they receive and return as
<a name="line-565"></a> "the continuation".
<a name="line-566"></a>
<a name="line-567"></a> (E, Maybe E,Maybe (SetTag,QNFA))
<a name="line-568"></a>
<a name="line-569"></a> The first E is the source of the danger that must be avoided. It
<a name="line-570"></a> starts out a reference to the QNFA/QT state that will be created by
<a name="line-571"></a> the most recent parent Star node. Thus it is a recursive reference
<a name="line-572"></a> from the MonadFix machinery. In particular, this value cannot be
<a name="line-573"></a> returned to the parent Star to be included in itself or we get a "let
<a name="line-574"></a> x = y; y=x" style infinite loop.
<a name="line-575"></a>
<a name="line-576"></a> As act* progresses the first E is actually modified to be the parent
<a name="line-577"></a> QNFA/QT as "seen" when all the elements to the right have accepted 0
<a name="line-578"></a> characters. Thus it acquires tags and tests+tags (the NullView data
<a name="line-579"></a> is used for this purpose).
<a name="line-580"></a>
<a name="line-581"></a> The second item in the 3-tuple is a Maybe E. This will be used as the
<a name="line-582"></a> source of the QT for this contents of the Star QNFA/QT. It will be
<a name="line-583"></a> merged with the Star's own continuation data. It starts out Nothing
<a name="line-584"></a> and stays that way as long as there are no accepting transitions in
<a name="line-585"></a> the Star's pattern. This is value (via getQT) returned by inStar.
<a name="line-586"></a>
<a name="line-587"></a> The third item is a special optimization I added to remove a source
<a name="line-588"></a> of orphaned QNFAs. A Star within Act will often have to create a
<a name="line-589"></a> QNFA node. This cannot go into the second Maybe E item as Just
<a name="line-590"></a> (SetTag,Left QNFA) because this QNFA can have pulled values from the
<a name="line-591"></a> recursive parent Star's QNFA/QT in the first E value. Thus pulling
<a name="line-592"></a> with getQT from the QNFA and using that as the Maybe E would likely
<a name="line-593"></a> cause an infinite loop. This extra QNFA is stored in the thd3
<a name="line-594"></a> location for use by getE. To improve it further it can accumulate
<a name="line-595"></a> Tag information after being formed.
<a name="line-596"></a>
<a name="line-597"></a> When a non nullable Q is handled by act it checks to see if the
<a name="line-598"></a> third value is there, in which case it uses that QNFA as the total
<a name="line-599"></a> continuation (subsumed in getE). Otherwise it merges the first E
<a name="line-600"></a> with any (Just E) in the second value to form the continuation.
<a name="line-601"></a>
<a name="line-602"></a> -}</span>
<a name="line-603"></a>
<a name="line-604"></a> <span class='hs-varid'>act</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>E</span><span class='hs-layout'>)</span>
<a name="line-605"></a> <span class='hs-varid'>act</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>nullable</span> <span class='hs-varid'>qIn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>snd3</span> <span class='hs-varop'>$</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>c</span>
<a name="line-606"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< act "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-607"></a> <span class='hs-varid'>mqt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span> <span class='hs-varid'>getE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>c</span> <span class='hs-layout'>)</span>
<a name="line-608"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>mqt</span> <span class='hs-comment'>-- or "return (fromQT qtlose,mqt,Nothing)"</span>
<a name="line-609"></a>
<a name="line-610"></a> <span class='hs-varid'>actNullable</span><span class='hs-layout'>,</span><span class='hs-varid'>actNullableTagless</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ActCont</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>ActCont</span>
<a name="line-611"></a> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>qIn</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Q</span> <span class='hs-layout'>{</span><span class='hs-varid'>preReset</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>resets</span><span class='hs-layout'>,</span><span class='hs-varid'>postSet</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>sets</span><span class='hs-layout'>,</span><span class='hs-varid'>preTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span><span class='hs-varid'>postTag</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>post</span><span class='hs-layout'>,</span><span class='hs-varid'>unQ</span><span class='hs-keyglyph'>=</span><span class='hs-varid'>pIn</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'>=</span>
<a name="line-612"></a> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< actNullable "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-613"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>pIn</span> <span class='hs-keyword'>of</span>
<a name="line-614"></a> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResetsAC</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSetsAC</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac</span>
<a name="line-615"></a> <span class='hs-conid'>Test</span> <span class='hs-varid'>ti</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResetsAC</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTestAC</span> <span class='hs-varid'>ti</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSetsAC</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac</span>
<a name="line-616"></a> <span class='hs-conid'>OneChar</span> <span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"OneChar cannot have nullable True "</span><span class='hs-layout'>)</span>
<a name="line-617"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupResetsAC</span> <span class='hs-varid'>resets</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>actNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-layout'>(</span> <span class='hs-varid'>addTagAC</span> <span class='hs-varid'>post</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addGroupSetsAC</span> <span class='hs-varid'>sets</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac</span> <span class='hs-layout'>)</span>
<a name="line-618"></a>
<a name="line-619"></a> <span class='hs-varid'>actNullableTagless</span> <span class='hs-varid'>qIn</span> <span class='hs-varid'>ac</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-varid'>mAccepting</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>debug</span> <span class='hs-layout'>(</span><span class='hs-str'>">< actNullableTagless "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-varop'>++</span><span class='hs-str'>" <>"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-620"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unQ</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-621"></a> <span class='hs-conid'>Seq</span> <span class='hs-varid'>q1</span> <span class='hs-varid'>q2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q1</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q2</span> <span class='hs-varid'>ac</span> <span class='hs-comment'>-- We know q1 and q2 are nullable</span>
<a name="line-622"></a>
<a name="line-623"></a> <span class='hs-conid'>Or</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>ac</span>
<a name="line-624"></a> <span class='hs-conid'>Or</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>q</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>actNullableTagless</span> <span class='hs-varid'>q</span> <span class='hs-varid'>ac</span>
<a name="line-625"></a> <span class='hs-conid'>Or</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-626"></a> <span class='hs-varid'>cqts</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>do</span>
<a name="line-627"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>all</span> <span class='hs-varid'>nullable</span> <span class='hs-varid'>qs</span>
<a name="line-628"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>snd3</span> <span class='hs-varop'>$</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q</span> <span class='hs-varid'>ac</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span><span class='hs-keyglyph'>]</span>
<a name="line-629"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-630"></a> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asQNFA</span> <span class='hs-str'>"qToNFA/actNullableTagless/Or"</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac</span>
<a name="line-631"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>act'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Q</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>E</span><span class='hs-layout'>)</span>
<a name="line-632"></a> <span class='hs-varid'>act'</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getTrans</span> <span class='hs-varid'>q</span> <span class='hs-varid'>e'</span>
<a name="line-633"></a> <span class='hs-varid'>sequence</span> <span class='hs-keyglyph'>[</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>nullable</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>snd3</span> <span class='hs-varop'>$</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q</span> <span class='hs-varid'>ac</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>act'</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qs</span> <span class='hs-keyglyph'>]</span>
<a name="line-634"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>qts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>getQT</span> <span class='hs-layout'>(</span><span class='hs-varid'>catMaybes</span> <span class='hs-varid'>cqts</span><span class='hs-layout'>)</span>
<a name="line-635"></a> <span class='hs-varid'>eLoop'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-636"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>wtags</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>addWinTags</span> <span class='hs-varid'>wtags</span> <span class='hs-varid'>eLoop</span> <span class='hs-comment'>-- nullable without tests; avoid getQT</span>
<a name="line-637"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>applyNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>qIn</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>getQT</span> <span class='hs-varid'>eLoop</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- suspect this of duplicating some tags with nullQ qIn</span>
<a name="line-638"></a> <span class='hs-varid'>mAccepting'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>qts</span>
<a name="line-639"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>applyNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>qIn</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span><span class='hs-layout'>)</span> <span class='hs-varid'>mAccepting</span> <span class='hs-comment'>-- suspect this of duplicating some tags with nullQ qIn</span>
<a name="line-640"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>foldr1</span> <span class='hs-varid'>mergeAltQT</span> <span class='hs-varid'>qts</span><span class='hs-layout'>)</span>
<a name="line-641"></a> <span class='hs-varid'>mQNFA'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>qts</span>
<a name="line-642"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-643"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>wtags</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTags</span> <span class='hs-varid'>wtags</span><span class='hs-layout'>)</span> <span class='hs-varid'>mQNFA</span>
<a name="line-644"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Nothing</span>
<a name="line-645"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-646"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>eLoop'</span><span class='hs-layout'>,</span><span class='hs-varid'>mAccepting'</span><span class='hs-layout'>,</span><span class='hs-varid'>mQNFA'</span><span class='hs-layout'>)</span>
<a name="line-647"></a>
<a name="line-648"></a> <span class='hs-conid'>Star</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varid'>mayFirstBeNull</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-649"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>ac0</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>mAccepting0</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>clear</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-650"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>notNullable</span> <span class='hs-varid'>q</span>
<a name="line-651"></a> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>ac</span><span class='hs-layout'>,</span><span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-652"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isNothing</span> <span class='hs-varid'>mOrbit</span>
<a name="line-653"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>of</span>
<a name="line-654"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>ac</span><span class='hs-layout'>,</span><span class='hs-conid'>True</span><span class='hs-layout'>)</span>
<a name="line-655"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>wtags</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>addWinTagsAC</span> <span class='hs-varid'>wtags</span> <span class='hs-varid'>ac</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span>
<a name="line-656"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>let</span> <span class='hs-varid'>nQ</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>preferNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span>
<a name="line-657"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>nQ</span> <span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>nQ</span> <span class='hs-varid'>mAccepting</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span>
<a name="line-658"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>nQ</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>.</span> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-varid'>mOrbit</span>
<a name="line-659"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>preferNullViews</span> <span class='hs-layout'>(</span><span class='hs-varid'>nullQ</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>leaveOrbit</span> <span class='hs-varid'>mOrbit</span>
<a name="line-660"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>nQ</span> <span class='hs-varid'>eLoop</span><span class='hs-layout'>,</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>nQ</span> <span class='hs-varid'>mAccepting</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-conid'>False</span><span class='hs-layout'>)</span>
<a name="line-661"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>cannotAccept</span> <span class='hs-varid'>q</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-varid'>ac0</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>mdo</span>
<a name="line-662"></a> <span class='hs-varid'>mChildAccepting</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>act</span> <span class='hs-varid'>q</span> <span class='hs-layout'>(</span><span class='hs-varid'>this</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-663"></a> <span class='hs-layout'>(</span><span class='hs-varid'>thisAC</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-varid'>this</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>ansAC</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span>
<a name="line-664"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mChildAccepting</span> <span class='hs-keyword'>of</span>
<a name="line-665"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Weird pattern in getTransTagless/Star: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span>
<a name="line-666"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>childAccepting</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-667"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>childQT</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-varid'>resetTheseOrbits</span> <span class='hs-varop'>.</span> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>childAccepting</span>
<a name="line-668"></a> <span class='hs-varid'>thisQT</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>childQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>leaveOrbit</span> <span class='hs-varid'>mOrbit</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac</span>
<a name="line-669"></a> <span class='hs-varid'>thisAccepting</span> <span class='hs-keyglyph'>=</span>
<a name="line-670"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mAccepting</span> <span class='hs-keyword'>of</span>
<a name="line-671"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>futureAccepting</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>childQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>futureAccepting</span>
<a name="line-672"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>childQT</span>
<a name="line-673"></a> <span class='hs-varid'>thisAll</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>usesQNFA</span> <span class='hs-varid'>q</span>
<a name="line-674"></a> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>thisQNFA</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newQNFA</span> <span class='hs-str'>"actNullableTagless/Star"</span> <span class='hs-varid'>thisQT</span>
<a name="line-675"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQNFA</span> <span class='hs-varid'>thisQNFA</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisAccepting</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span><span class='hs-varid'>thisQNFA</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-676"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varid'>thisQT</span><span class='hs-layout'>,</span> <span class='hs-varid'>thisAccepting</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-677"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>skipQT</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>childQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ac0</span> <span class='hs-comment'>-- for first iteration the continuation uses NullView</span>
<a name="line-678"></a> <span class='hs-varid'>skipAccepting</span> <span class='hs-keyglyph'>=</span>
<a name="line-679"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mAccepting0</span> <span class='hs-keyword'>of</span>
<a name="line-680"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>futureAccepting0</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>childQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>futureAccepting0</span>
<a name="line-681"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>childQT</span>
<a name="line-682"></a> <span class='hs-varid'>ansAll</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromQT</span> <span class='hs-varid'>skipQT</span><span class='hs-layout'>,</span> <span class='hs-varid'>skipAccepting</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-683"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>thisAll</span><span class='hs-layout'>,</span><span class='hs-varid'>ansAll</span><span class='hs-layout'>)</span>
<a name="line-684"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>mayFirstBeNull</span> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>clear</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>thisAC</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>ansAC</span><span class='hs-layout'>)</span>
<a name="line-685"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>thisAC</span><span class='hs-layout'>)</span>
<a name="line-686"></a> <span class='hs-conid'>NonEmpty</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ecart</span> <span class='hs-layout'>(</span><span class='hs-str'>"\n> actNullableTagless/NonEmpty"</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-varid'>qIn</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-687"></a> <span class='hs-comment'>-- We *know* that q is nullable from Pattern and CorePattern checks, but assert here anyway</span>
<a name="line-688"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>mustAccept</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"actNullableTagless/NonEmpty : provided with a *mustAccept* pattern: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-689"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>cannotAccept</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"actNullableTagless/NonEmpty : provided with a *cannotAccept* pattern: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-690"></a>
<a name="line-691"></a> <span class='hs-comment'>{- This is like actNullable (Or [Empty,q]) without the extra tag to prefer the first Empty branch -}</span>
<a name="line-692"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>clearE</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>maybeOnlyEmpty</span> <span class='hs-varid'>qIn</span> <span class='hs-keyword'>of</span>
<a name="line-693"></a> <span class='hs-conid'>Just</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ac</span>
<a name="line-694"></a> <span class='hs-conid'>Just</span> <span class='hs-sel'>_wtags</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>ac</span> <span class='hs-comment'>-- addWinTagsAC wtags ac XXX was duplicating tags</span>
<a name="line-695"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"actNullableTagless/NonEmpty is supposed to have an emptyNull nullView : "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span>
<a name="line-696"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span><span class='hs-varid'>mChildAccepting</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>actNullable</span> <span class='hs-varid'>q</span> <span class='hs-varid'>ac</span>
<a name="line-697"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mChildAccepting</span> <span class='hs-keyword'>of</span>
<a name="line-698"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Weird pattern in actNullableTagless/NonEmpty: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span>
<a name="line-699"></a> <span class='hs-comment'>-- cannotAccept q checked for and excluded the above condition (and starTrans!)</span>
<a name="line-700"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>childAccepting</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-701"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>childQT</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getQT</span> <span class='hs-varid'>childAccepting</span>
<a name="line-702"></a> <span class='hs-varid'>thisAccepting</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mAccepting</span> <span class='hs-keyword'>of</span>
<a name="line-703"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>childQT</span>
<a name="line-704"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>futureAcceptingE</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Just</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mergeQT</span> <span class='hs-varid'>childQT</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>futureAcceptingE</span>
<a name="line-705"></a> <span class='hs-comment'>-- I _think_ there is no need for mergeQT_2nd in the above.</span>
<a name="line-706"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>clearE</span><span class='hs-layout'>,</span><span class='hs-varid'>thisAccepting</span><span class='hs-layout'>,</span><span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-707"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-varop'>$</span> <span class='hs-str'>"This case in Text.Regex.TNFA.TNFA.actNullableTagless cannot happen: "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>qIn</span><span class='hs-layout'>)</span>
<a name="line-708"></a>
<a name="line-709"></a> <span class='hs-comment'>-- This is applied directly to any qt immediately before passing to mergeQT</span>
<a name="line-710"></a> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-711"></a> <span class='hs-varid'>resetOrbitsQT</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lastStarGreedy</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-varid'>id</span>
<a name="line-712"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tags</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>prependTags'</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-conid'>ResetOrbitTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>tag</span><span class='hs-keyglyph'><-</span><span class='hs-varid'>tags</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-713"></a>
<a name="line-714"></a> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-715"></a> <span class='hs-varid'>enterOrbitQT</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lastStarGreedy</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-varid'>id</span>
<a name="line-716"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tag</span><span class='hs-keyglyph'>-></span><span class='hs-varid'>prependTags'</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>PreUpdate</span> <span class='hs-conid'>EnterOrbitTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-717"></a>
<a name="line-718"></a> <span class='hs-varid'>leaveOrbit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span>
<a name="line-719"></a> <span class='hs-varid'>leaveOrbit</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lastStarGreedy</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span> <span class='hs-varid'>id</span>
<a name="line-720"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-varid'>id</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tag</span><span class='hs-keyglyph'>-></span><span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>-></span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>LeaveOrbitTask</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-721"></a>
<a name="line-722"></a> <span class='hs-comment'>-- 'newTrans' is the only place where PostUpdate is used and is only called from getTrans/OneChar</span>
<a name="line-723"></a> <span class='hs-comment'>-- and is the only caller of 'acceptTrans' to make QT/Simple nodes.</span>
<a name="line-724"></a> <span class='hs-varid'>newTrans</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- debugging string for when a newQNFA is allocated</span>
<a name="line-725"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Tag</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- which tags get ResetGroupStopTask in this transition (PreUpdate)</span>
<a name="line-726"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Tag</span> <span class='hs-comment'>-- maybe one TagTask to update before incrementing the offset (PreUpdate)</span>
<a name="line-727"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pattern</span> <span class='hs-comment'>-- the one character accepting Pattern of this transition</span>
<a name="line-728"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>E</span> <span class='hs-comment'>-- the continuation state, reified to a QNFA, of after this Pattern</span>
<a name="line-729"></a> <span class='hs-comment'>-- The fst part of the E is consumed here as a TagTask (PostUpdate)</span>
<a name="line-730"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span> <span class='hs-conid'>E</span> <span class='hs-comment'>-- the continuation state, as a QT, of before this Pattern</span>
<a name="line-731"></a> <span class='hs-varid'>newTrans</span> <span class='hs-varid'>s</span> <span class='hs-varid'>resets</span> <span class='hs-varid'>mPre</span> <span class='hs-varid'>pat</span> <span class='hs-layout'>(</span><span class='hs-varid'>tags</span><span class='hs-layout'>,</span><span class='hs-varid'>cont</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-732"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>cont</span> <span class='hs-keyword'>of</span>
<a name="line-733"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>qnfa</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>q_id</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- strictQNFA ZZZ no help</span>
<a name="line-734"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>qt</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>qnfa</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newQNFA</span> <span class='hs-varid'>s</span> <span class='hs-varid'>qt</span> <span class='hs-comment'>-- strictQT ZZZ no help</span>
<a name="line-735"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>q_id</span> <span class='hs-varid'>qnfa</span><span class='hs-layout'>)</span>
<a name="line-736"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>post</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>promoteTasks</span> <span class='hs-conid'>PostUpdate</span> <span class='hs-varid'>tags</span>
<a name="line-737"></a> <span class='hs-varid'>pre</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>promoteTasks</span> <span class='hs-conid'>PreUpdate</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>ResetGroupStopTask</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>tag</span><span class='hs-keyglyph'><-</span><span class='hs-varid'>resets</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>tag</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>tag</span><span class='hs-layout'>,</span><span class='hs-conid'>TagTask</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>mPre</span><span class='hs-layout'>)</span>
<a name="line-738"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromQT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>acceptTrans</span> <span class='hs-varid'>pre</span> <span class='hs-varid'>pat</span> <span class='hs-varid'>post</span> <span class='hs-varid'>i</span> <span class='hs-comment'>-- fromQT $ strictQT no help</span>
<a name="line-739"></a>
<a name="line-740"></a> <span class='hs-comment'>-- 'acceptTrans' is the sole creator of QT/Simple and is only called by getTrans/OneChar/newTrans</span>
<a name="line-741"></a> <span class='hs-varid'>acceptTrans</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TagList</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Pattern</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TagList</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Index</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QT</span>
<a name="line-742"></a> <span class='hs-varid'>acceptTrans</span> <span class='hs-varid'>pre</span> <span class='hs-varid'>pIn</span> <span class='hs-varid'>post</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-743"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>target</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>getDoPa</span> <span class='hs-varid'>pIn</span><span class='hs-layout'>,</span><span class='hs-varid'>pre</span><span class='hs-varop'>++</span><span class='hs-varid'>post</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-744"></a> <span class='hs-keyword'>in</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>pIn</span> <span class='hs-keyword'>of</span>
<a name="line-745"></a> <span class='hs-conid'>PChar</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>char</span> <span class='hs-keyglyph'>-></span>
<a name="line-746"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toMap</span> <span class='hs-varid'>target</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>char</span><span class='hs-keyglyph'>]</span>
<a name="line-747"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>trans</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span> <span class='hs-layout'>}</span>
<a name="line-748"></a> <span class='hs-conid'>PEscape</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>char</span> <span class='hs-keyglyph'>-></span>
<a name="line-749"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toMap</span> <span class='hs-varid'>target</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>char</span><span class='hs-keyglyph'>]</span>
<a name="line-750"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>trans</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span> <span class='hs-layout'>}</span>
<a name="line-751"></a> <span class='hs-conid'>PDot</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dotTrans</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>target</span> <span class='hs-layout'>}</span>
<a name="line-752"></a> <span class='hs-conid'>PAny</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>-></span>
<a name="line-753"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toMap</span> <span class='hs-varid'>target</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span> <span class='hs-varop'>.</span> <span class='hs-varid'>decodePatternSet</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ps</span>
<a name="line-754"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>trans</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span> <span class='hs-layout'>}</span>
<a name="line-755"></a> <span class='hs-conid'>PAnyNot</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>-></span>
<a name="line-756"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toMap</span> <span class='hs-varid'>mempty</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span> <span class='hs-varop'>.</span> <span class='hs-varid'>addNewline</span> <span class='hs-varop'>.</span> <span class='hs-varid'>decodePatternSet</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ps</span>
<a name="line-757"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Simple</span> <span class='hs-layout'>{</span> <span class='hs-varid'>qt_win</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_trans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>trans</span><span class='hs-layout'>,</span> <span class='hs-varid'>qt_other</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>target</span> <span class='hs-layout'>}</span>
<a name="line-758"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>err</span> <span class='hs-layout'>(</span><span class='hs-str'>"Cannot acceptTrans pattern "</span><span class='hs-varop'>++</span><span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>qTop</span><span class='hs-layout'>,</span><span class='hs-varid'>pIn</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-759"></a> <span class='hs-keyword'>where</span> <span class='hs-comment'>-- Take a common destination and a sorted list of unique chraceters</span>
<a name="line-760"></a> <span class='hs-comment'>-- and create a map from those characters to the common destination</span>
<a name="line-761"></a> <span class='hs-varid'>toMap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IntMap</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>DoPa</span><span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Tag</span><span class='hs-layout'>,</span> <span class='hs-conid'>TagUpdate</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Char</span><span class='hs-keyglyph'>]</span>
<a name="line-762"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CharMap</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntMap</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>DoPa</span><span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Tag</span><span class='hs-layout'>,</span> <span class='hs-conid'>TagUpdate</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-763"></a> <span class='hs-varid'>toMap</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>caseSensitive</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CharMap</span> <span class='hs-varop'>.</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromDistinctAscList</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>ord</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>dest</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-764"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CharMap</span> <span class='hs-varop'>.</span> <span class='hs-conid'>IMap</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-765"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-varid'>dl</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isAlpha</span> <span class='hs-varid'>c</span>
<a name="line-766"></a> <span class='hs-keyword'>then</span> <span class='hs-layout'>(</span><span class='hs-varid'>dl</span><span class='hs-varop'>.</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ord</span> <span class='hs-layout'>(</span><span class='hs-varid'>toUpper</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>dest</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-767"></a> <span class='hs-varop'>.</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ord</span> <span class='hs-layout'>(</span><span class='hs-varid'>toLower</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>dest</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span>
<a name="line-768"></a> <span class='hs-layout'>)</span>
<a name="line-769"></a> <span class='hs-keyword'>else</span> <span class='hs-layout'>(</span><span class='hs-varid'>dl</span><span class='hs-varop'>.</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>ord</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>dest</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-770"></a> <span class='hs-layout'>)</span> <span class='hs-varid'>id</span>
<a name="line-771"></a> <span class='hs-varid'>addNewline</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>multiline</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-chr'>'\n'</span>
<a name="line-772"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-773"></a> <span class='hs-varid'>dotTrans</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>multiline</span> <span class='hs-varid'>compOpt</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>singleton</span> <span class='hs-chr'>'\n'</span> <span class='hs-varid'>mempty</span>
<a name="line-774"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mempty</span>
<a name="line-775"></a>
<a name="line-776"></a><span class='hs-comment'>{-
<a name="line-777"></a>
<a name="line-778"></a>prepend architecture becomes
<a name="line-779"></a>prependTags :: TagTask -> [Tag] -> QT -> QT
<a name="line-780"></a>which always uses PreUpdate and the same task for all the tags
<a name="line-781"></a>
<a name="line-782"></a>qt_win seems to only allow PreUpdate so why keep the same type?
<a name="line-783"></a>
<a name="line-784"></a>
<a name="line-785"></a>ADD ORPHAN ID check and make this a fatal error while testing
<a name="line-786"></a>
<a name="line-787"></a>-}</span>
<a name="line-788"></a>
<a name="line-789"></a><a name="decodePatternSet"></a><span class='hs-comment'>-- | decodePatternSet cannot handle collating element and treats</span>
<a name="line-790"></a><span class='hs-comment'>-- equivalence classes as just their definition and nothing more.</span>
<a name="line-791"></a><span class='hs-definition'>decodePatternSet</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PatternSet</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-conid'>Char</span>
<a name="line-792"></a><span class='hs-definition'>decodePatternSet</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatternSet</span> <span class='hs-varid'>msc</span> <span class='hs-varid'>mscc</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>msec</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-793"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>baseMSC</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybe</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>empty</span> <span class='hs-varid'>id</span> <span class='hs-varid'>msc</span>
<a name="line-794"></a> <span class='hs-varid'>withMSCC</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span><span class='hs-layout'>)</span> <span class='hs-varid'>baseMSC</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>concatMap</span> <span class='hs-varid'>decodeCharacterClass</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span><span class='hs-layout'>)</span> <span class='hs-varid'>mscc</span><span class='hs-layout'>)</span>
<a name="line-795"></a> <span class='hs-varid'>withMSEC</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span><span class='hs-layout'>)</span> <span class='hs-varid'>withMSCC</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>concatMap</span> <span class='hs-varid'>unSEC</span> <span class='hs-varop'>.</span> <span class='hs-conid'>S</span><span class='hs-varop'>.</span><span class='hs-varid'>toAscList</span><span class='hs-layout'>)</span> <span class='hs-varid'>msec</span><span class='hs-layout'>)</span>
<a name="line-796"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>withMSEC</span>
<a name="line-797"></a>
<a name="line-798"></a><a name="decodeCharacterClass"></a><span class='hs-comment'>-- | This returns the disctince ascending list of characters</span>
<a name="line-799"></a><span class='hs-comment'>-- represented by [: :] values in legalCharacterClasses; unrecognized</span>
<a name="line-800"></a><span class='hs-comment'>-- class names return an empty string</span>
<a name="line-801"></a><span class='hs-definition'>decodeCharacterClass</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PatternSetCharacterClass</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-802"></a><span class='hs-definition'>decodeCharacterClass</span> <span class='hs-layout'>(</span><span class='hs-conid'>PatternSetCharacterClass</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-803"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-804"></a> <span class='hs-str'>"alnum"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'0'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'9'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'z'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'Z'</span><span class='hs-keyglyph'>]</span>
<a name="line-805"></a> <span class='hs-str'>"digit"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'0'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'9'</span><span class='hs-keyglyph'>]</span>
<a name="line-806"></a> <span class='hs-str'>"punct"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\33'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\47'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'\58'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\64'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'\91'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\95'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-str'>"\96"</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'\123'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\126'</span><span class='hs-keyglyph'>]</span>
<a name="line-807"></a> <span class='hs-str'>"alpha"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'z'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'Z'</span><span class='hs-keyglyph'>]</span>
<a name="line-808"></a> <span class='hs-str'>"graph"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\41'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\126'</span><span class='hs-keyglyph'>]</span>
<a name="line-809"></a> <span class='hs-str'>"space"</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"\t\n\v\f\r "</span>
<a name="line-810"></a> <span class='hs-str'>"blank"</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"\t "</span>
<a name="line-811"></a> <span class='hs-str'>"lower"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'z'</span><span class='hs-keyglyph'>]</span>
<a name="line-812"></a> <span class='hs-str'>"upper"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'Z'</span><span class='hs-keyglyph'>]</span>
<a name="line-813"></a> <span class='hs-str'>"cntrl"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\0'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\31'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-str'>"\127"</span> <span class='hs-comment'>-- with NUL</span>
<a name="line-814"></a> <span class='hs-str'>"print"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'\32'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'\126'</span><span class='hs-keyglyph'>]</span>
<a name="line-815"></a> <span class='hs-str'>"xdigit"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'0'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'9'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'f'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'F'</span><span class='hs-keyglyph'>]</span>
<a name="line-816"></a> <span class='hs-str'>"word"</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'0'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'9'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'z'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-keyglyph'>[</span><span class='hs-chr'>'A'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'Z'</span><span class='hs-keyglyph'>]</span><span class='hs-varop'>++</span><span class='hs-str'>"_"</span>
<a name="line-817"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>[]</span>
<a name="line-818"></a>
<a name="line-819"></a><span class='hs-comment'>{-
<a name="line-820"></a>-- | This is the list of recognized [: :] character classes, others
<a name="line-821"></a>-- are decoded as empty.
<a name="line-822"></a>legalCharacterClasses :: [String]
<a name="line-823"></a>legalCharacterClasses = ["alnum","digit","punct","alpha","graph"
<a name="line-824"></a> ,"space","blank","lower","upper","cntrl","print","xdigit","word"]
<a name="line-825"></a>
<a name="line-826"></a>-}</span>
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