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<title>src/Hint/ListRec.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE PatternGuards, ViewPatterns #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>{-
<a name="line-4"></a>map f [] = []
<a name="line-5"></a>map f (x:xs) = f x : map f xs
<a name="line-6"></a>
<a name="line-7"></a>foldr f z [] = z
<a name="line-8"></a>foldr f z (x:xs) = f x (foldr f z xs)
<a name="line-9"></a>
<a name="line-10"></a>foldl f z [] = z
<a name="line-11"></a>foldl f z (x:xs) = foldl f (f z x) xs
<a name="line-12"></a>-}</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-comment'>{-
<a name="line-15"></a><TEST>
<a name="line-16"></a>f (x:xs) = negate x + f xs ; f [] = 0 -- f xs = foldr ((+) . negate) 0 xs
<a name="line-17"></a>f (x:xs) = x + 1 : f xs ; f [] = [] -- f xs = map (+ 1) xs
<a name="line-18"></a>f z (x:xs) = f (z*x) xs ; f z [] = z -- f z xs = foldl (*) z xs
<a name="line-19"></a>f a (x:xs) b = x + a + b : f a xs b ; f a [] b = [] -- f a xs b = map (\ x -> x + a + b) xs
<a name="line-20"></a>f [] a = return a ; f (x:xs) a = a + x >>= \fax -> f xs fax -- f xs a = foldM (+) a xs
<a name="line-21"></a>foos [] x = x; foos (y:ys) x = foo y $ foos ys x -- foos ys x = foldr foo x ys
<a name="line-22"></a>f [] y = y; f (x:xs) y = f xs $ g x y -- f xs y = foldl (flip g) y xs
<a name="line-23"></a>f [] y = y; f (x : xs) y = let z = g x y in f xs z -- f xs y = foldl (flip g) y xs
<a name="line-24"></a>f [] y = y; f (x:xs) y = f xs (f xs z)
<a name="line-25"></a></TEST>
<a name="line-26"></a>-}</span>
<a name="line-27"></a>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>ListRec</span><span class='hs-layout'>(</span><span class='hs-varid'>listRecHint</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-30"></a>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>Type</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Util</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Hint</span><span class='hs-varop'>.</span><span class='hs-conid'>Util</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ord</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Either</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>
<a name="line-39"></a>
<a name="line-40"></a>
<a name="line-41"></a><a name="listRecHint"></a><span class='hs-definition'>listRecHint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DeclHint</span>
<a name="line-42"></a><span class='hs-definition'>listRecHint</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>universe</span>
<a name="line-43"></a> <span class='hs-keyword'>where</span>
<a name="line-44"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>o</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>maybeToList</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-45"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>o</span>
<a name="line-46"></a> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>addCase</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findCase</span> <span class='hs-varid'>x</span>
<a name="line-47"></a> <span class='hs-layout'>(</span><span class='hs-varid'>use</span><span class='hs-layout'>,</span><span class='hs-varid'>severity</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>matchListRec</span> <span class='hs-varid'>x</span>
<a name="line-48"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addCase</span> <span class='hs-varid'>x</span>
<a name="line-49"></a> <span class='hs-varid'>guard</span> <span class='hs-varop'>$</span> <span class='hs-varid'>recursiveStr</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>y</span>
<a name="line-50"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>idea</span> <span class='hs-varid'>severity</span> <span class='hs-layout'>(</span><span class='hs-str'>"Use "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>use</span><span class='hs-layout'>)</span> <span class='hs-varid'>o</span> <span class='hs-varid'>y</span>
<a name="line-51"></a>
<a name="line-52"></a>
<a name="line-53"></a><a name="recursiveStr"></a><span class='hs-definition'>recursiveStr</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"_recursive_"</span>
<a name="line-54"></a><a name="recursive"></a><span class='hs-definition'>recursive</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>recursiveStr</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="ListCase"></a><span class='hs-comment'>-- recursion parameters, nil-case, (x,xs,cons-case)</span>
<a name="line-57"></a><a name="ListCase"></a><span class='hs-comment'>-- for cons-case delete any recursive calls with xs from them</span>
<a name="line-58"></a><a name="ListCase"></a><span class='hs-comment'>-- any recursive calls are marked "_recursive_"</span>
<a name="line-59"></a><a name="ListCase"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ListCase</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ListCase</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-conid'>Exp_</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>Exp_</span><span class='hs-layout'>)</span>
<a name="line-60"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-61"></a>
<a name="line-62"></a>
<a name="line-63"></a><a name="BList"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BList</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BNil</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BCons</span> <span class='hs-conid'>String</span> <span class='hs-conid'>String</span>
<a name="line-64"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Ord</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="Branch"></a><span class='hs-comment'>-- function name, parameters, list-position, list-type, body (unmodified)</span>
<a name="line-67"></a><a name="Branch"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Branch</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Branch</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>BList</span> <span class='hs-conid'>Exp_</span>
<a name="line-68"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-69"></a>
<a name="line-70"></a>
<a name="line-71"></a>
<a name="line-72"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-73"></a><span class='hs-comment'>-- MATCH THE RECURSION</span>
<a name="line-74"></a>
<a name="line-75"></a>
<a name="line-76"></a><a name="matchListRec"></a><span class='hs-definition'>matchListRec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ListCase</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>Severity</span><span class='hs-layout'>,</span><span class='hs-conid'>Exp_</span><span class='hs-layout'>)</span>
<a name="line-77"></a><span class='hs-definition'>matchListRec</span> <span class='hs-varid'>o</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>ListCase</span> <span class='hs-varid'>vs</span> <span class='hs-varid'>nil</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>xs</span><span class='hs-layout'>,</span><span class='hs-varid'>cons</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>nil</span> <span class='hs-varop'>~=</span> <span class='hs-str'>"[]"</span><span class='hs-layout'>,</span> <span class='hs-conid'>InfixApp</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>c</span> <span class='hs-varid'>rhs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>cons</span><span class='hs-layout'>,</span> <span class='hs-varid'>opExp</span> <span class='hs-varid'>c</span> <span class='hs-varop'>~=</span> <span class='hs-str'>":"</span>
<a name="line-80"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromParen</span> <span class='hs-varid'>rhs</span> <span class='hs-varop'>=~=</span> <span class='hs-varid'>recursive</span><span class='hs-layout'>,</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>lhs</span>
<a name="line-81"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>(,,)</span> <span class='hs-str'>"map"</span> <span class='hs-conid'>Error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>appsBracket</span>
<a name="line-82"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>toNamed</span> <span class='hs-str'>"map"</span><span class='hs-layout'>,</span> <span class='hs-varid'>niceLambda</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>lhs</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-83"></a>
<a name="line-84"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-conid'>App2</span> <span class='hs-varid'>op</span> <span class='hs-varid'>lhs</span> <span class='hs-varid'>rhs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>view</span> <span class='hs-varid'>cons</span>
<a name="line-85"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>op</span> <span class='hs-varop'>`disjoint`</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-86"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fromParen</span> <span class='hs-varid'>rhs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>recursive</span><span class='hs-layout'>,</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>lhs</span>
<a name="line-87"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>(,,)</span> <span class='hs-str'>"foldr"</span> <span class='hs-conid'>Warning</span> <span class='hs-varop'>$</span> <span class='hs-varid'>appsBracket</span>
<a name="line-88"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>toNamed</span> <span class='hs-str'>"foldr"</span><span class='hs-layout'>,</span> <span class='hs-varid'>niceLambda</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-varid'>appsBracket</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>op</span><span class='hs-layout'>,</span><span class='hs-varid'>lhs</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>nil</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-89"></a>
<a name="line-90"></a> <span class='hs-keyglyph'>|</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>v</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>view</span> <span class='hs-varid'>nil</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-conid'>App</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>r</span> <span class='hs-varid'>lhs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>cons</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span> <span class='hs-varop'>=~=</span> <span class='hs-varid'>recursive</span>
<a name="line-91"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>lhs</span>
<a name="line-92"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>(,,)</span> <span class='hs-str'>"foldl"</span> <span class='hs-conid'>Warning</span> <span class='hs-varop'>$</span> <span class='hs-varid'>appsBracket</span>
<a name="line-93"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>toNamed</span> <span class='hs-str'>"foldl"</span><span class='hs-layout'>,</span> <span class='hs-varid'>niceLambda</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>lhs</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-94"></a>
<a name="line-95"></a> <span class='hs-keyglyph'>|</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>v</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-conid'>App</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>ret</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nil</span><span class='hs-layout'>,</span> <span class='hs-varid'>ret</span> <span class='hs-varop'>~=</span> <span class='hs-str'>"return"</span><span class='hs-layout'>,</span> <span class='hs-varid'>res</span> <span class='hs-varop'>~=</span> <span class='hs-str'>"()"</span> <span class='hs-varop'>||</span> <span class='hs-varid'>view</span> <span class='hs-varid'>res</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>v</span>
<a name="line-96"></a> <span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Generator</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PVar_</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-conid'>Qualifier</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromParen</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>App</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asDo</span> <span class='hs-varid'>cons</span>
<a name="line-97"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>b1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>b2</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span> <span class='hs-varop'>==</span> <span class='hs-varid'>recursive</span><span class='hs-layout'>,</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>`notElem`</span> <span class='hs-varid'>vars</span> <span class='hs-varid'>e</span>
<a name="line-98"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'><-</span> <span class='hs-str'>"foldM"</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'_'</span><span class='hs-keyglyph'>|</span><span class='hs-varid'>res</span> <span class='hs-varop'>~=</span> <span class='hs-str'>"()"</span><span class='hs-keyglyph'>]</span>
<a name="line-99"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>(,,)</span> <span class='hs-varid'>name</span> <span class='hs-conid'>Warning</span> <span class='hs-varop'>$</span> <span class='hs-varid'>appsBracket</span>
<a name="line-100"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>toNamed</span> <span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>niceLambda</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>toNamed</span> <span class='hs-varid'>xs</span><span class='hs-keyglyph'>]</span>
<a name="line-101"></a>
<a name="line-102"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-103"></a>
<a name="line-104"></a>
<a name="line-105"></a><a name="asDo"></a><span class='hs-comment'>-- Very limited attempt to convert >>= to do, only useful for foldM/foldM_</span>
<a name="line-106"></a><span class='hs-definition'>asDo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Exp_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Stmt</span> <span class='hs-conid'>S</span><span class='hs-keyglyph'>]</span>
<a name="line-107"></a><span class='hs-definition'>asDo</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>App2</span> <span class='hs-varid'>bind</span> <span class='hs-varid'>lhs</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lambda</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>v</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>rhs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Generator</span> <span class='hs-varid'>an</span> <span class='hs-varid'>v</span> <span class='hs-varid'>lhs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Qualifier</span> <span class='hs-varid'>an</span> <span class='hs-varid'>rhs</span><span class='hs-keyglyph'>]</span>
<a name="line-108"></a><span class='hs-definition'>asDo</span> <span class='hs-layout'>(</span><span class='hs-conid'>Do</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-109"></a><span class='hs-definition'>asDo</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Qualifier</span> <span class='hs-varid'>an</span> <span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span>
<a name="line-110"></a>
<a name="line-111"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-112"></a><span class='hs-comment'>-- FIND THE CASE ANALYSIS</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="findCase"></a><span class='hs-definition'>findCase</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Decl_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListCase</span><span class='hs-layout'>,</span> <span class='hs-conid'>Exp_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Decl_</span><span class='hs-layout'>)</span>
<a name="line-115"></a><span class='hs-definition'>findCase</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-116"></a> <span class='hs-conid'>FunBind</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x1</span><span class='hs-layout'>,</span><span class='hs-varid'>x2</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-117"></a> <span class='hs-conid'>Branch</span> <span class='hs-varid'>name1</span> <span class='hs-varid'>ps1</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>b1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findBranch</span> <span class='hs-varid'>x1</span>
<a name="line-118"></a> <span class='hs-conid'>Branch</span> <span class='hs-varid'>name2</span> <span class='hs-varid'>ps2</span> <span class='hs-varid'>p2</span> <span class='hs-varid'>c2</span> <span class='hs-varid'>b2</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findBranch</span> <span class='hs-varid'>x2</span>
<a name="line-119"></a> <span class='hs-varid'>guard</span> <span class='hs-layout'>(</span><span class='hs-varid'>name1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>name2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>ps1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ps2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>p1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-120"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>BNil</span><span class='hs-layout'>,</span> <span class='hs-varid'>b1</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-conid'>BCons</span> <span class='hs-varid'>x</span> <span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-varid'>b2</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sortBy</span> <span class='hs-layout'>(</span><span class='hs-varid'>comparing</span> <span class='hs-varid'>fst</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>c1</span><span class='hs-layout'>,</span><span class='hs-varid'>b1</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>c2</span><span class='hs-layout'>,</span><span class='hs-varid'>b2</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-121"></a> <span class='hs-varid'>b2</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>transformAppsM</span> <span class='hs-layout'>(</span><span class='hs-varid'>delCons</span> <span class='hs-varid'>name1</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>b2</span>
<a name="line-122"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ps</span><span class='hs-layout'>,</span><span class='hs-varid'>b2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>eliminateArgs</span> <span class='hs-varid'>ps1</span> <span class='hs-varid'>b2</span>
<a name="line-123"></a>
<a name="line-124"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ps12</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAt</span> <span class='hs-varid'>p1</span> <span class='hs-varid'>ps1</span> <span class='hs-keyword'>in</span> <span class='hs-varid'>map</span> <span class='hs-varid'>toNamed</span> <span class='hs-varop'>$</span> <span class='hs-varid'>a</span> <span class='hs-varop'>++</span> <span class='hs-varid'>xs</span> <span class='hs-conop'>:</span> <span class='hs-varid'>b</span>
<a name="line-125"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>ListCase</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>b1</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>xs</span><span class='hs-layout'>,</span><span class='hs-varid'>b2</span><span class='hs-layout'>)</span>
<a name="line-126"></a> <span class='hs-layout'>,</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FunBind</span> <span class='hs-varid'>an</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Match</span> <span class='hs-varid'>an</span> <span class='hs-layout'>(</span><span class='hs-varid'>toNamed</span> <span class='hs-varid'>name1</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps12</span> <span class='hs-layout'>(</span><span class='hs-conid'>UnGuardedRhs</span> <span class='hs-varid'>an</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-127"></a>
<a name="line-128"></a>
<a name="line-129"></a><a name="delCons"></a><span class='hs-definition'>delCons</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Exp_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Exp_</span>
<a name="line-130"></a><span class='hs-definition'>delCons</span> <span class='hs-varid'>func</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>var</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromApps</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>x</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-keyglyph'>|</span> <span class='hs-varid'>func</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-131"></a> <span class='hs-layout'>(</span><span class='hs-varid'>pre</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-conop'>:</span><span class='hs-varid'>post</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>splitAt</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>xs</span>
<a name="line-132"></a> <span class='hs-varid'>guard</span> <span class='hs-varop'>$</span> <span class='hs-varid'>v</span> <span class='hs-varop'>==</span> <span class='hs-varid'>var</span>
<a name="line-133"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>apps</span> <span class='hs-varop'>$</span> <span class='hs-varid'>recursive</span> <span class='hs-conop'>:</span> <span class='hs-varid'>pre</span> <span class='hs-varop'>++</span> <span class='hs-varid'>post</span>
<a name="line-134"></a><span class='hs-definition'>delCons</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-135"></a>
<a name="line-136"></a>
<a name="line-137"></a><a name="eliminateArgs"></a><span class='hs-definition'>eliminateArgs</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Exp_</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Exp_</span><span class='hs-layout'>)</span>
<a name="line-138"></a><span class='hs-definition'>eliminateArgs</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>cons</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>remove</span> <span class='hs-varid'>ps</span><span class='hs-layout'>,</span> <span class='hs-varid'>transform</span> <span class='hs-varid'>f</span> <span class='hs-varid'>cons</span><span class='hs-layout'>)</span>
<a name="line-139"></a> <span class='hs-keyword'>where</span>
<a name="line-140"></a> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>zs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>z</span><span class='hs-conop'>:</span><span class='hs-varid'>zs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fromApps</span> <span class='hs-varop'>$</span> <span class='hs-varid'>universeApps</span> <span class='hs-varid'>cons</span><span class='hs-layout'>,</span> <span class='hs-varid'>z</span> <span class='hs-varop'>=~=</span> <span class='hs-varid'>recursive</span><span class='hs-keyglyph'>]</span>
<a name="line-141"></a> <span class='hs-varid'>elim</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>all</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>xs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>length</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>></span> <span class='hs-varid'>i</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>view</span> <span class='hs-layout'>(</span><span class='hs-varid'>xs</span> <span class='hs-varop'>!!</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Var_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-keyglyph'>[</span><span class='hs-num'>0</span><span class='hs-keyglyph'>..</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>ps</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>repeat</span> <span class='hs-conid'>False</span>
<a name="line-142"></a> <span class='hs-varid'>remove</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>.</span> <span class='hs-varid'>zipWith</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>b</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>elim</span>
<a name="line-143"></a>
<a name="line-144"></a> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromApps</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>recursive</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>apps</span> <span class='hs-varop'>$</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>remove</span> <span class='hs-varid'>xs</span>
<a name="line-145"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-146"></a>
<a name="line-147"></a>
<a name="line-148"></a><span class='hs-comment'>---------------------------------------------------------------------</span>
<a name="line-149"></a><span class='hs-comment'>-- FIND A BRANCH</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="findBranch"></a><span class='hs-definition'>findBranch</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Match</span> <span class='hs-conid'>S</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Branch</span>
<a name="line-152"></a><span class='hs-definition'>findBranch</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-153"></a> <span class='hs-conid'>Match</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>name</span> <span class='hs-varid'>ps</span> <span class='hs-layout'>(</span><span class='hs-conid'>UnGuardedRhs</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>bod</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-154"></a> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span><span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findPat</span> <span class='hs-varid'>ps</span>
<a name="line-155"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Branch</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromNamed</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varop'>$</span> <span class='hs-varid'>simplifyExp</span> <span class='hs-varid'>bod</span>
<a name="line-156"></a>
<a name="line-157"></a>
<a name="line-158"></a><a name="findPat"></a><span class='hs-definition'>findPat</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Pat_</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>BList</span><span class='hs-layout'>)</span>
<a name="line-159"></a><span class='hs-definition'>findPat</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-160"></a> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>readPat</span> <span class='hs-varid'>ps</span>
<a name="line-161"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>i</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>findIndices</span> <span class='hs-varid'>isRight</span> <span class='hs-varid'>ps</span>
<a name="line-162"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>left</span><span class='hs-layout'>,</span><span class='hs-keyglyph'>[</span><span class='hs-varid'>right</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>partitionEithers</span> <span class='hs-varid'>ps</span>
<a name="line-163"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>left</span><span class='hs-layout'>,</span> <span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>right</span><span class='hs-layout'>)</span>
<a name="line-164"></a>
<a name="line-165"></a>
<a name="line-166"></a><a name="readPat"></a><span class='hs-definition'>readPat</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Pat_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>String</span> <span class='hs-conid'>BList</span><span class='hs-layout'>)</span>
<a name="line-167"></a><span class='hs-definition'>readPat</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PVar_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>x</span>
<a name="line-168"></a><span class='hs-definition'>readPat</span> <span class='hs-layout'>(</span><span class='hs-conid'>PParen</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>PInfixApp</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PVar_</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Special</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Cons</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PVar_</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-varop'>$</span> <span class='hs-conid'>BCons</span> <span class='hs-varid'>x</span> <span class='hs-varid'>xs</span>
<a name="line-169"></a><span class='hs-definition'>readPat</span> <span class='hs-layout'>(</span><span class='hs-conid'>PList</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-conid'>BNil</span>
<a name="line-170"></a><span class='hs-definition'>readPat</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
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