[antlr-interest] Faster expression parsing for ANTLR

Jim Idle jimi at temporal-wave.com
Wed Dec 17 16:15:43 PST 2008


On Wed, 17 Dec 2008 14:51:34 -0800, Zenzike <zenzike at gmail.com> wrote:

> I have just started playing with ANTLR, and it's been a pretty fun ride 
> so far,
> but I'm having troubles with a gated semantic predicate that has a
> rule parameter
> in it -- when it gets hoisted, the parameter goes out of scope.
>


Instead of using a rule parameter in the predicate, assign the rule parameter to a scope variable. The 'scope' is never out of scope unless you found a path to a rule where it was not created. 

Jim

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