On Wed, 2008-12-03 at 17:41 +0800, chain one wrote:
> procedure_id
> : { isFirst }? id=IDENT { addId($id.getText(),PROCEDURE_IDENT); }
> | nid=PROCEDURE_IDENT { $nid.setType(IDENT);} ->
> ^(PROCEDURE_ID[] PROCEDURE_IDENT)
> ;
> In the first pass, isFirst is true, and in the second pass, isFirst
> is set to be false.
> When running the generated Java code, it seems every time
> the predicate fails, there will be an error message coming out like
> this:
>
>
> line 43:41 rule named_types failed predicate: { isFirst }?
>
>
>
> Could it be ignored? or there is something wrong with my grammar file?
>
You need to use a gated semantic predicate not a semantic predicate.
{ isFirst }?=>
You should also read through the getting started with ANTLR 3 links on
antlr.org as they will save you a lot of time.
Jim
>
>
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