>Gang,
>
>I've seen quite a few references to double dispatching. What is that?
>URL's, pointers to docs, or a simple RTFM (but *which* FM) would be
>appreciated.

I'd suggest that you look at the paper "A simple technique for Handlling 
Multiple Polyymorphism" by Daniel H. H. Ingalls in OOPSLA '86 Conference 
Proceedings. Also published as SigPlan Notices Volume 21 Number 11 
November 1986. pp 347.


Pat Caudill