[antlr-interest] Re: rooting a parser rule rather than a token

[lgcraymer]

--- In antlr-interest at yahoogroups.com, "Eric Mahurin"
<eric_mahurin at y...> wrote:
> I'm not sure why, but antlr doesn't currently allow you to make a call
> to a rule from another rule an AST root.  So, you can't do something
> like this:
> 
> binary_expression : primary (binary_operator^ primary)* ;
> 
That's a feature, not a bug.  It prevents you from losing any children
of the binary_operator root AST.  We did talk about this particular
topic at the cabal, and ANTLR 3 may provide a different approach.

--Loring



 
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