On Fri, Oct 16, 2009 at 4:39 AM, Naveen Chawla
<naveen.c...@googlemail.com> wrote:
> So, does anybody have a way of doing "Take *a* IF not followed by *b* (both
> syntactic constructs)" ?
>
> i.e.
> q: (a !b)=> a; //("!" or "not" doesn't exist in
> ANTLR)
I think that would be a nice syntax for ANTLR to support.
I would guess that you could generally accomplish the same thing by
placing the "opposite" syntactic predicate on your other
alternative(s) in your production. In other words:
(a b)=> alternative_1
| alternative_2 ...
Rather than:
(a !b)=> alternative_2
| alternative_1
--
Kaleb Pederson
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