[antlr-interest] Modification of Node Attributes using Tree Grammar
Terence Parr
parrt at jguru.com
Thu Jun 13 11:32:07 PDT 2002
On Thursday, June 13, 2002, at 09:40 AM, Niall Gormley wrote:
> Hi,
>
> Is it possible to use a Tree Grammar to modify Node attributes?
>
> The node "i" is getting modified buy the call to "setVariantType" but I
> can't seem to get it copied to the output AST for the dims expression.
> So
> the real question might be, how can I get source node "i" to end up in
> the
> output expression?
>
> dims!
> : #( LITERAL_DIM i:IDENT )
> {
> i.setVariantType(0);
> #dims = #( #[LITERAL_DIM], #(i));
> }
> ;
Howdy. i points to the output node created from IDENT so you it seems
you are setting the proper variable. #(i) is very strange though. What
do you mean here? #i or i works, but #(i) is a long way to say make i
the root of a tree with only one node: i. That may be something for
which the code gen is broken. Try removing the #(...) around the i and
see what happens. Let me know if this is a bug and I'll add to the
list. Loring may already have found this ;)
Ter
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