Aho-Corasick string matching algorithm.
cabal update
cabal install AhoCorasick
example1 = mapM_ print $ findAll simpleSM "ushers" where
simpleSM = makeSimpleStateMachine ["he","she","his","hers"]Position {pIndex = 1, pLength = 3, pVal = "she"}
Position {pIndex = 2, pLength = 2, pVal = "he"}
Position {pIndex = 2, pLength = 4, pVal = "hers"}
example2 = mapM_ print $ findAll sm "ushers" where
sm = makeStateMachine [("he",0),("she",1),("his",2),("hers",3)]Position {pIndex = 1, pLength = 3, pVal = 1}
Position {pIndex = 2, pLength = 2, pVal = 0}
Position {pIndex = 2, pLength = 4, pVal = 3}
example3 = mapM_ print $ next sm "ushers" where
sm = makeSimpleStateMachine ["he","she","his","hers"]
next _ [] = []
next sm (s:n) = let (SMStepRes match nextSM) = stateMachineStep sm s in
(s, match) : next nextSM n('u',[])
('s',[])
('h',[])
('e',[(3,"she"),(2,"he")])
('r',[])
('s',[(4,"hers")])
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