Re: Is there an option to change the message produced by YYERROR_VERBOSE?

[Matthias Simon]

Hi Simon,

depending on your grammar, you might treat the keyword as an identifier 
and just throw a warning in the lexer:


        "banana" {
                if (!SUPPORTS_KEYWORD(yyextra->config.std)) {
                        fprintf(stderr, "warning: `banana' keyword not 
available\n");
                        return TOK_ID;
                }
                return TOK_KW_BANANA;
        }



Alternatively, semantic predicates might help you:

        
http://www.gnu.org/software/bison/manual/bison.html#Semantic-Predicates


Or the lexer could store the last few keywords in a global list and 
--instead of parsing `unexpected %s'-- yyerror uses this list. But I am 
not sure about that one, I would expect its success depends heavily on 
the parser-algorithm.

Cheers,
Matthias