[antlr-interest] ANTLR 3 output=AST for tree parser?

[Terence Parr]

Hi. Sorry.  I need to add tree construction to tree parsers.  Will do  
after v3.0 release.  Very handy, I agree.
Ter
On Feb 26, 2007, at 12:42 PM, FranklinChen at cmu.edu wrote:

> Kay Roepke writes:
>>
>> On Feb 26, 2007, at 3:14 PM, Mark Bednarczyk wrote:
>>
>>> So in essence, I rely on tree walker rules to do the matching and
>>> get me in
>>> the right place of the AST, the action code to do any processing and
>>> rewrites and then rewrite "->" to produce the templates in the last
>>> phase of
>>> the processing.
>>
>> Yeah, that's the way to do it right now. In the future it'd be
>> awesome to do tree
>> transformations by having some syntax for it :)
>>
>> cheers,
>> -k
>
> Yes, that's what I've been having to do also, performing rewrites by
> hand.  The reason I really like having ANTLR 2 style tree
> transformations is that for various purposes (debugging and
> retargeting), it is useful for me to be able to have intermediate
> trees.  In ANTLR 3, I am having to do do a lot inside actions, and
> also this means that the whole parser has to be recompiled again and
> again even though after the parsing itself is done (to the simplest
> possible AST without rewrites), all I'm actually changing is the tree
> structure I'm outputting.
>
> -- 
> Franklin