I guess I should mention that I'm extending Richard's goodie into a full
relational algebra, which will allow composition, some lazy querying and
(relational) iteration, and inversion.

I'm really just borrowing features from my Arrows code, which needed to be
made practical anyway: a lot of the code simply tried to emulate eventual
references and block closures and other nice features which I can take
from other libraries now.

It shouldn't take long. I expect a good functional release in another day
or two.

On Thu, 27 Mar 2003, Avi Bryant wrote:

> Have you considered splitting the interface into two separate classes,
> each with the same protocol?  That is, rather than having (public) #source
> and #target versions of every method, have source and target wrapper
> objects (perspectives?) that are backed by the same data.  I would guess
> that many users of the BinaryRelation are always going to be navigating in
> one direction or the other - if they were handed the appropiate
> perspective, they wouldn't even necessarily have to realize they were
> using anything but a dictionary.
>
> I suppose this makes more sense as well as rather than instead of the
> current interface, but it would IMO add a lot to the usability.

-- 
Brian T. Rice
LOGOS Research and Development
mailto:water at tunes.org
http://tunes.org/~water/