Text.Regex.TDFA.TDFA

Description

Text.Regex.TDFA.TDFA converts the QNFA from TNFA into the DFA. A DFA state corresponds to a Set of QNFA states, repesented as list of Index which are used to lookup the DFA state in a lazy Trie which holds all possible subsets of QNFA states.

Synopsis

Documentation

patternToRegex :: (Pattern, (GroupIndex, DoPa)) -> CompOption -> ExecOption -> Regex Source

data DFA Source

Internal DFA node, identified by the Set of indices of the QNFA nodes it represents.

Constructors

DFA
Fields d_id :: SetIndex d_dt :: DT

Instances

Show DFA

data DT Source

Internal to the DFA node

Constructors

Simple'
Fields dt_win :: IntMap Instructions Actions to perform to win dt_trans :: CharMap Transition Transition to accept Char dt_other :: Transition default accepting transition
Testing'
Fields dt_test :: WhichTest The test to perform dt_dopas :: EnumSet DoPa location(s) of the anchor(s) in the original regexp dt_a :: DT use dt_a if test is True else use dt_b dt_b :: DT use dt_a if test is True else use dt_b

Instances

Show DT

examineDFA :: Regex -> String Source

nfaToDFA :: ((Index, Array Index QNFA), Array Tag OP, Array GroupIndex [GroupInfo]) -> CompOption -> ExecOption -> Regex Source

dfaMap :: DFA -> Map SetIndex DFA Source