[antlr-interest] Tree construction in Antlr

[Sergei Smolov]

Thank you, Oliver, that helps me so much! FirstToken really not a token, but
a name of rule.

By the way, is it true, that FIRSTTOKEN must be included in "tokens {...}"
block? Or I can avoid from that?



2010/5/14 Oliver Zeigermann <oliver.zeigermann at gmail.com>

> Hi Sergei!
>
> The problem might be that in your grammar FirstToken is not a token,
> but the name of a rule. You might want to create a new token, though?
>
> FirstToken : Second Third
> ->
> ^( FIRSTTOKEN["firstToken"] Second Third)
> ;
>
> Hope that helps!
>
> - Oliver
>
> 2010/5/14 Sergei Smolov <ssedai at gmail.com>:
> > Hello, everybody!
> > I have a very simple question. For example, I have the following grammar
> > rule:
> >
> > FirstToken : Second Third;
> >
> > And I want to generate the following tree from such rule (I mean Tree in
> > Java terms):
> >
> >        FirstToken
> >        /           \
> >  Second      Third
> >
> > How should I rewrite my grammar rule? As far, as I understand, I can use
> '^'
> > and '!' operators for it. But I don't understand how to make First Token
> a
> > root of this tree.
> >
> > Thanks in advance
> >
> > --
> > Sergey Smolov
> >
> > List: http://www.antlr.org/mailman/listinfo/antlr-interest
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> >
>



-- 
Sergey Smolov