[antlr-interest] antlrworks interpreter like serialized parse tree

[Candide Kemmler]

Yes that's already what I'm doing but the AST (in the form of a CommonTree) is only really giving me the leaf tokens without the intermediary branches corresponding to the rules that "recognized" my programs.

I have attached an example of a test grammar to illustrate what I mean. The sample sentence where multiple rules are fired ("location", "when", "where",...) are shown in a nice hierarchy in AntlrWorks whereas in the debugger in Eclipse I can only see a flat structure where the root tree has a boring set of 6 children each corresponding to the final tokens of my sentence.

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Or maybe I am completely missing the point here...

On 25 Jan 2010, at 21:14, Gavin Lambert wrote:

> At 01:17 26/01/2010, Candide Kemmler wrote:
> >I love the parse tree representation that antlrWorks presents and
> >getting such a structure would be ideal for my use case. However I
> >can't seem to find a way to create a similar representation of the
> >parse tree using the API.
> 
> Normally you don't really want to generate the parse tree as shown in ANTLRworks -- that's purely a debugging aid.  For production use you're better off generating an AST instead; this way you have more control over the output and you can (among other things) refactor your parser without altering the output if you want to.
> 
> See the output=AST option and the various example grammars, wiki pages, and book chapters about AST construction.
>