[antlr-interest] Predicate Question...

[Terence Parr]

On Nov 6, 2006, at 2:40 AM, Hill, Robert wrote:

> Does it make sense to have predicates in tree parsers in V3?

Possible, but trees should be designed so they are unnecessary.  The  
tree grammar should be trivial...no need for preds.
Ter
> If the predicate is skipped, the failedPredException is thrown, and  
> the parsing following the exception gets out of sync.
>
> Does the rule you're skipping have to be a root token?
>
> I think I'm misunderstanding the usage here.
> Does anyone have any pointers to any (simple!) examples ?
>
> Cheers!
>
> Rob
>
> Robert Hill
> Information Engineer
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