From: Clifford Heath <no.spam@...>
Date: 2005-10-13T15:06:53+09:00
Subject: Re: Default argument values for blocks

Caleb Clausen wrote:
> But... does anyone know why I couldn't get yacc to do what was so easy
> in my hand-coded lexer? I've long since erased my yacc hacks in
> disgust, but if anyone's interested enough to want to see them, they
> can easily be reproduced.

I forget the details now, but C has the same problem with the comma
operator, when it occurs in a function-call parameter list - the
precedence changes. You might see how that is handled in one of the
many yacc grammars for C.

FWIW, I think that the goalpost symbol was a bad choice by matz, but
regardless of that, you're aiming at the right work-around.

Clifford Heath.