On Thu, Apr 24, 2008 at 08:48:15PM +0200, Wolfgang Jeltsch wrote:
Am Mittwoch, 23. April 2008 06:18 schrieb John Meacham:
On Tue, Apr 22, 2008 at 08:33:53AM +0100, Simon Peyton-Jones wrote:
Is this the most up-to-date description of the proposal? http://repetae.net/recent/out/classalias.html
There were a few changes proposed in the discussion that followed my announcement that I wanted to make. The one I can remember now is getting rid of the 'alias' keyword since the equals sign unabiguously identifies it as an alias. I will dig through the archive to find the others..
I also have some remark: Why not write
class Eq a => Num a = (Additive a, Multiplicative a)
instead of
class Num a = Eq a => (Additive a, Multiplicative a)
Well, because you can think of 'Num a' as an alias for 'Eq a => (Additive a, Multiplicative a)', not that Eq is a superclass of Num which the class declaration syntax implies. John -- John Meacham - ⑆repetae.net⑆john⑈