Who needs Ord for Sets and Maps anyway?

[ajb at spamcop.net]

G'day all.

Quoting Sebastian Sylvan <sebastian.sylvan at gmail.com>:

> A good "standard" class hierarchy for collections and several
> implementations is very much needed, IMO.

For the record, the consensus seemed to be that we needed something, but
Edison wasn't it.

One problem that I got bogged down in was the idea that some data structures
most sensibly reside in monads (e.g. IOArrays) and some do not.  A consistent
interface for both proved elusive.

Cheers,
Andrew Bromage