4 Jun
2007
4 Jun
'07
1:54 p.m.
On 6/4/07, DavidA
Yes, I'm afraid that you are understanding correctly. Annoying isn't it.
It is well-known (among Haskell mathematicians at least) that the numeric type classes in the prelude are broken.
A few days ago I found myself forced to write:
instance Floating Fixed where ...
where 'Fixed' is a fixed point arithmetic class! :-) When you find yourself having to make a type an instance of the complete 'opposite' class you know you have serious problems! -- Dan