NYACC: getting source location info?

[tomas]

Hi,

I'm having some fun with NYACC (thanks, Matt!).

To help debugging things and for errors and warnings, it'd be nice
to "know" where the current LHS non-terminal starts in the source.

Its endpoint is (is it?) (port-line (current-input-port) [and, of
course, (port-column ...)] -- at least some playing around suggest
that (and it makes sense, somehow).

Is there anything I've overlooked? Or do I have to hack the (or
roll-my-own) lexer for that?

Thanks for any insight

cheers
-- t

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