[grammarians] Comparison to RubyFront grammar

[Tom Copeland]

On Tue, 2006-10-24 at 18:32 -0400, MenTaLguY wrote:
> On Tue, 2006-10-24 at 16:26 -0500, Nick Sieger wrote:
> > I for one am still interested.  I was looking at the rubyfront grammar
> > this weekend and I don't think it should be too hard to port to ANTLR
> > 3.
> > 
> > Also, what about the idea of a multi-pass parser?  With Ruby's syntax
> > so complex, it might help to break down into several stages for
> > understandability.
> 
> That was Terence's opinion as well, if I remember correctly (Hi Ter!).
> I've not had time to look at the RubyFront grammar deeply, but I was a
> little surprised that Yong Zhi was apparently able to do heredocs
> without multiple passes, actually.

Xue has a good blog entry on this here:

http://seclib.blogspot.com/2005/11/more-on-leftshift-and-heredoc.html

It turns out to be a whitespace thing.  

I'm occasionally fiddling with a JavaCC Ruby grammar and have had fun
time sorting through this and also the various %w{} sorts of things...
good times.

Yours,

Tom