AntlrErrorString.java 文件源码

public static String exceptionString(Parser parser, RecognitionException ex) {
    if (ex instanceof FailedPredicateException) {
        return failedPredicate((FailedPredicateException) ex);
    } else if (ex instanceof InputMismatchException) {
        return inputMismatch((InputMismatchException) ex);
    } else if (ex instanceof NoViableAltException) {
        return noViableAlt(parser, (NoViableAltException) ex);
    } else {
        System.err.println("unknown recognition exception:" + ex);
        return ex.toString();
    }
}