Ignoring %prec

[darrenks]

Bison is ignoring %prec for this simple grammar:

%left PRIORITY2
%left PRIORITY1
%token NUMBER
%%

program : expr  { };
expr : expr '+' expr %prec PRIORITY2  { };
expr : expr '-' expr %prec PRIORITY2  { };
expr : expr '*' expr %prec PRIORITY1  { };
expr : expr '/' expr %prec PRIORITY1  { };
expr : NUMBER  { };

%%
int yyerror(char *s) {
        fprintf(stderr, "error, line %d: %s\n", yylineno, s);
        return 0;
}

int main(int argc, char **argv) {
        yyparse();
        return 0;
}

#include "lex.yy.c"






Attached is debug version + the lex file for testing purposes.

Thanks,
Darren

I realize a work around is to not use %prec for this, but this is not an option for my purposes because I am attempting to create the bison grammar file automatically from a format where one specifies priority with a number in the rules. If this is not a bug, I would appreciate any help on how to make this work properly because from all the documentation I have read it seems it ought to.

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