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Re: symbol declarations after rules
From: |
Joel E. Denny |
Subject: |
Re: symbol declarations after rules |
Date: |
Thu, 22 Jun 2006 18:35:35 -0400 (EDT) |
On Thu, 22 Jun 2006, Paul Eggert wrote:
> "Joel E. Denny" <address@hidden> writes:
>
> > Agreed? Is there anything else like this?
>
> Usually it's better if order of declarations doesn't matter.
I do agree it's more flexible. This is similar to the
%after-definitions/%before-definitions vs. %header discussion.
I was originally thinking the error messages would be easier to implement
even if only as a short-term fix. However, I'm now thinking it won't be
too difficult to move the rule checks to after parsing the entire grammar
file. I should probably implement this before implementing the
%destructor/%printer extensions.
By the way, I'm looking forward to your patch to make Bison detect <tag>
usage. I think it will have an impact on the patches I'm working on.
> Does order matter elsewhere?
A few places at least. %union for dividing the pre-prologue blocks from
the post-prologue blocks. One %define can override an earlier %define.
Precedence declarations. Computing the start symbol (assuming no %start).
Reduce-reduce conflict resolution. But past bad decisions are not
justification for future bad decisions.
Thanks.
Joel
- symbol declarations after rules, Joel E. Denny, 2006/06/22
- Re: symbol declarations after rules, Paul Eggert, 2006/06/22
- Re: symbol declarations after rules,
Joel E. Denny <=
- Re: symbol declarations after rules, Paul Eggert, 2006/06/22
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/22
- Re: symbol declarations after rules, Paul Eggert, 2006/06/22
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/22
- Re: symbol declarations after rules, Paul Eggert, 2006/06/22
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/22
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/23
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/23
- Re: symbol declarations after rules, Joel E. Denny, 2006/06/23
- Re: symbol declarations after rules, Akim Demaille, 2006/06/27