Re: Question about GLR parsing with bison 2.3

[Derek M Jones]

Pierre PICARD wrote:
> I have a problem using bison 2.3, I read the documentation, but I did not found 
> what I was searching for.
> Here is my problem :
> I'am writing a GLR parser, and I would like to do a semantic check in a 
> semantic action that would have the following behavior if the check fails :
> - while a deterministic analysis (with only 1 stack) : display a syntax error.
> - while an analysis with multiple stacks : simply kills the current stack.
> I would prefer to do that in a semantic action instead of during the semantic 
> analysis, is it possible ?

I would like to second such a feature request (or something like it).
Several times in the past I have seen that being able to execute some
action while in a multi-stack parsing state would save me lots of work.

I have looked at the Bison source with a view to adding such
functionality.  But what goes on is so convoluted that I have
not been able to spend enough time to figure out how to do what
I would like.

--
Derek M. Jones                              tel: +44 (0) 1252 520 667
Knowledge Software Ltd                      mailto:address@hidden
Applications Standards Conformance Testing    http://www.knosof.co.uk