On 25 Nov 2006, at 03:00, Joel E. Denny wrote:
You would need a rule telling, in the case of multiple
occurrences, when the
default names can be used.
I addressed the problem of ambiguous names here:
http://lists.gnu.org/archive/html/bison-patches/2006-11/
msg00039.html
I looked at it, before my post, now that the mail list server is up
again.
You are into the idea that the unused variables should be expressed
via the grammar language. It is a wholly unusual way to do it via a
computer language: normally it is a compiler option.
So I am working along the lines of a compiler option that can be
temporarily turned on in the case one needs to check unused
variables. This would then simplify the implementation of new grammar
language features, as the past discussion has shown.
I have myself little use of an unused variables feature, making it
difficult for me to focus on it - so I leave it to you to decide it
(which you, as developer, will do anyway :-)). My main concern is
that it should not conflict with anything else that might be
implemented later, like an eventual EBNF, or something else that
might come up.
Hans Aberg
