[antlr-interest] How to look only for one rule?

[Loring Craymer]

Hmm.  In cases where you have a complete grammar (and
for C, the ANTLR 2 C grammar stuff done by Monty and
others is definitely complete), I usually find it
better to take that and recognize everything but only
process what you need.  I would suggest modifying the
C grammar to build trees that only contain the methods
of interest and none of the stuff that you want to
ignore.  That gets you to a solution fast, and also
leaves room for extending the range of what you are
interested in later.

--Loring


--- Terence Parr <parrt at cs.usfca.edu> wrote:

> Hi.  See the filter example, which does it all in
> the lexer.  Have a
> 
> EVERYTHINGELSE : . ;
> 
> rule at bottom to skip everything but your rules of
> interest.
> Ter
> On Oct 21, 2006, at 4:54 AM, Matthias Gutheil wrote:
> 
> > Hello,
> >
> > I am writing a fuzzy C grammar and I am only
> interesting in methods  
> > with parameters and return values.
> >
> > The method definition is not the problem, but I
> want to skip  
> > anything else.
> > For example something like (method | ~method)
> doesn't work, cause  
> > so the first token af a real method (return type
> or name) goes in  
> > ~method.
> >
> > Some tips?
> >
> > Matthias
> 
> 


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