Re: too many warnings from Bison CVS for Pike

[Akim Demaille]

>>> "Joel" == Joel E Denny <address@hidden> writes:

 > For warnings of either level, there might be cases where the author is 
 > absolutely sure it's OK to ignore a value.  Thus, there should be some 
 > construct to declare the value as used.  We debated what that construct 
 > should be at length: YYUSE, YYBISON_USE, USE, YYUSE_VAL, YYUCK, $<>n

I think the problem should not be addressed in the action part, but
rather in the rule itself.  I have long been wanting a means to name
the symbols, instead of numbering them.  Something like

    exp(res): exp(lhs) '+' exp(rhs) { $res = $lhs + $rhs; }

We should then look for a syntax that makes explicit what symbols are
unused, e.g., 

    exp(): exp(lhs) '+' exp(rhs) { display ($lhs + $rhs); }