[antlr-interest] AST rewriting
Gavin Lambert
antlr at mirality.co.nz
Wed Jul 2 14:06:26 PDT 2008
At 14:57 2/07/2008, Bernardo Elayda wrote:
> >def : ^(DEF name expr) -> ^(DEF name $expr.value)
>I tried some additional experiments. I don['t think you can
>access the attribute 'value' in the context of a tree rewrite.
Have you tried this:
def : ^(DEF name expr) -> ^(DEF name {$expr.value}) ;
(Not sure if that's right either, but I have seen some examples
using something similar.)
Having said that, AST nodes can usually only be tokens -- you
can't add a raw string to it. So you'll probably need to do
something like this instead:
def : ^(DEF name expr) -> ^(DEF name STRING[$expr.value]) ;
(Not entirely sure about that syntax, but it's something like
that.)
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