predicate classes

[Justus Pendleton]

I decided to broaden my horizons so I was reading about/playing around with
Cecil.	One of the things Cecil has that I hadn't heard of before are
predicate classes
(http://www.cs.washington.edu/research/projects/cecil/cecil/www/www/Papers/pr
edicate-classes.html), which I thought were nifty beyond all belief.

I also thought it would be nifty if Python had them so I got the source
from the CVS respository and started hacking the grammar and realized I
had no idea what I was doing :-).

Before getting in any deeper in something I only vaguely understand I
thought I would ask the opinions of people who know more about Python
than I whether they think it would be
easy/hard/well-damn-nigh-impossible to add this kind of dynamic retyping
of objects based on predicates.

(I did a quick search on deja and didn't find any talk about this, so
apologies in advance if this is something that has been as talked to
death as the indentation thing.)


Sent via Deja.com http://www.deja.com/
Before you buy.