implementing a callback interface for a RecDescent parser

I would like to implement a generic callback interface
on the parser object where I can pass in a function
pointer and a hash of the rules where the function
should be called within an action assuming the rule is
matched sucessfully.  I know I can hack this in just
by sticking a named main subroutine into the actions,
but I would like a generic interface.

Is there a method to do this Damian, besides hacking a
pre-compiled parser package?  That stuff looks pretty
cryptic to me. I tried to create a sub (method) within
the startup section of the grammar, but that does not
work.  Is there a way to do this thru class
inheritance somehow?

Thanks,

Dave Mc


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