BeetlAntlrErrorStrategy.java 文件源码

protected void reportNoViableAlternative(@NotNull Parser recognizer, @NotNull NoViableAltException e)
{
    TokenStream tokens = recognizer.getInputStream();
    String input;
    if (tokens instanceof TokenStream)
    {
        if (e.getStartToken().getType() == Token.EOF)
            input = "<文件尾>";
        else
            input = tokens.getText(e.getStartToken(), e.getOffendingToken());
    }
    else
    {
        input = "<未知输入>";
    }
    BeetlException exception = null;
    if(keys.contains(e.getOffendingToken().getText())){
         exception = new BeetlParserException(BeetlException.PARSER_VIABLE_ERROR,
                    "不允许"+e.getOffendingToken().getText()+"关键出现在这里"+":"+escapeWSAndQuote(input), e);
    }else{
        exception = new BeetlParserException(BeetlException.PARSER_VIABLE_ERROR,
                escapeWSAndQuote(input), e);
    }
    //      String msg = "no viable alternative at input " + escapeWSAndQuote(input);

    exception.pushToken(this.getGrammarToken(e.getOffendingToken()));

    throw exception;
}