failOrAccept method
Implementation
int failOrAccept(
SimState prevAccept,
CharStream input,
ATNConfigSet reach,
int t,
) {
if (prevAccept.dfaState != null) {
final lexerActionExecutor = prevAccept.dfaState!.lexerActionExecutor;
accept(
input,
lexerActionExecutor,
startIndex,
prevAccept.index,
prevAccept.line,
prevAccept.charPos,
);
return prevAccept.dfaState!.prediction;
} else {
// if no accept and EOF is first char, return EOF
if (t == IntStream.EOF && input.index == startIndex) {
return Token.EOF;
}
throw LexerNoViableAltException(recog, input, startIndex, reach);
}
}