reset method
Implementation
void reset([bool resetInput = false]) {
// wacky Lexer state variables
if (resetInput) {
_input.seek(0); // rewind the input
}
_token = null;
type = Token.INVALID_TYPE;
channel = Token.DEFAULT_CHANNEL;
tokenStartCharIndex = -1;
tokenStartCharPositionInLine = -1;
tokenStartLine = -1;
_text = null;
_hitEOF = false;
mode_ = Lexer.DEFAULT_MODE;
_modeStack.clear();
interpreter?.reset();
}