[antlr-interest] Re: tree --> tree transformation

[Terence Parr]

On Jun 22, 2006, at 12:06 PM, Bernhard Damberger wrote:
> As a starting point, would it be possible for me to just make the  
> two fixes you outline below (locally), and just build trees using  
> that for now? It would be nice to be able to continue my  
> development while your still hashing out the issue of dups/no dups  
> etc.

Most likely that would work.

> Might also want to consider how TreeAdaptors fit into this whole  
> scheme.

yeah...

> Is this feature going to be working for the beta?

Nope... > 3.0 most likely

> _bernhard
>
> PS I was trying to manually move the Java grammer from 2.7 to 3.0.  
> Almost got it working, but I don't understand enough about the  
> parser (LL(*) etc) to finish it.

Did you see the example-v3/java/java.g, which is exactly that?

> But what I did do instead was use antlr 2.7 to create a tree that  
> implements both antlr.AST and org.antlr.Tree, and then use the  
> antlr 3.0 to do my tree transformation...which now I find is not  
> yet done. :-( Its a hack, but it works.
>
> PPS Whats the diff between ^ and ^^ in antlr 3.0?

^ in v2 is ^^ in v3.  Plain ^ in v3 means make root of enclosing  
subtree, which can be a subrule not just a root.

Ter