Arrow Classes

Ashley Yakeley
Tue, 15 Jul 2003 01:07:12 -0700

In article <>,
 Marcin 'Qrczak' Kowalczyk <> wrote:

> It doesn't provide instances of Num for anything which is already an instance 
> of the other classes. And in Haskell 98 they must be defined separately for 
> each type, instance (...) => Num a doesn't work.

It works in extended Haskell however, so I suspect it lays to rest the 
question of needing some other language extension.

Ashley Yakeley, Seattle WA