def __init__(self, grammarFileName:str, tokenNames:list, ruleNames:list, atn:ATN, input:TokenStream):
super().__init__(input)
self.grammarFileName = grammarFileName
self.atn = atn
self.tokenNames = tokenNames
self.ruleNames = ruleNames
self.decisionToDFA = [ DFA(state) for state in atn.decisionToState ]
self.sharedContextCache = PredictionContextCache()
self._parentContextStack = list()
# identify the ATN states where pushNewRecursionContext must be called
self.pushRecursionContextStates = set()
for state in atn.states:
if not isinstance(state, StarLoopEntryState):
continue
if state.isPrecedenceDecision:
self.pushRecursionContextStates.add(state.stateNumber)
# get atn simulator that knows how to do predictions
self._interp = ParserATNSimulator(self, atn, self.decisionToDFA, self.sharedContextCache)
