Arrow Classes

[Ashley Yakeley]

In article <200307141536.39157.qrczak@knm.org.pl>,
 Marcin 'Qrczak' Kowalczyk <qrczak@knm.org.pl> 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