Re: Are Google summer of code 2006 ideas still available?

[Joel E. Denny]

On Sun, 1 Apr 2007, Akim Demaille wrote:

> > I've often wished that Bison's syntactic and semantic analysis phases were
> > more fully separated.  However, this sounds like a major rewrite of vital
> > Bison internals.  If someone tackles this over the summer, I hope we can
> > find a way to maintain a stable version of Bison in parallel.
> 
> IMO there is actually more value to get from this rewrite than
> from %import itself: the latter is very reachable from the former.
> And a clean AST will considerably ease many other improvements.
> Not to mention that some of the bugs we hit would never have
> existed in the first place.

My comments had the wrong tone.  I completely agree with the idea and your 
comments above.  I too want an AST.  I just don't want to see this part of 
Bison destabilized for an extended period.  If we can't find a series of 
stable refactorings, perhaps we can find some temporary separation similar 
to push.c and yacc.c.