ThrowExceptionErrorListener.java 文件源码

@Override
public final void syntaxError(final Recognizer<?, ?> recognizer,
    final Object offendingSymbol, final int line,
    final int charPositionInLine, final String msg,
    final RecognitionException e) {
  String input;
  if (recognizer instanceof Lexer) {
    final CharStream cs = ((Lexer) recognizer).getInputStream();
    input = cs.getText(new Interval(0, cs.size()));
  } else if (recognizer instanceof Parser) {
    final TokenStream tokens = ((Parser) recognizer).getInputStream();
    if (tokens != null) {
      input = tokens.getText();
    } else {
      input = "<unknown input>";
    }
  } else {
    input = "<unknown input>";
  }
  throw new AntlrParseException(input, line, charPositionInLine, msg);
}