10 Apr
2009
10 Apr
'09
3:30 a.m.
IO a ~ World -> (a, World) I still don't understand this; we are passing a World and getting a World back, We are? Why do you think that? Because that's what (World -> (a,World)) means, last I checked.
No: Hasekll functions are partial, which means that "a -> b" means "takes an object of type `a' and if it terminates, it returns an object of type `b'". Note the "if it terminates". Since neither loop nor loop' terminate, their return type is actually meaningless. Stefan