[antlr-interest] Why does this conflict?

[shmuel siegel]

I thank you for calling attention to the difference between parser 
literals and lexer tokens. It is a nice way to eliminate many annoying 
non-determinism warnings when looking for both keywords and identifiers.

But there is a gotya which I was lucky enough to catch in one of my test 
cases. In my lexer, I strip the quotes from strings since I don't need 
them in my tree (and also don't want them in my output). Unfortunately 
that makes them candidates for reinterpretation.

Solution, override testLiteralsTable in the lexer
    public int testLiteralsTable(int ttype)
    {
        if (ttype == PreprocessorParserTokenTypes.STRING)
            return ttype;
        else
            return super.testLiteralsTable(ttype);
    }



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