Regular expression as dictionary key?

[Luke]

> I suspect though that you really just want a way to use a
> regular expression as a key, and created this singular/plural
> example as justification.

Yes and no.  This is one of many possible applications.  The plural 
search is a naive example, but for this application doesn't need to be 
excat either since the results are fuzzy anyway.

I suppose plodding through 10,000 or so keys won't slow things down 
horribly.  I'll come up with a tree or build some caching scheme if 
things get too bad.

I've got some C to read now.

L