Hello,
I'm learning haskell and I'm having some trouble with type classes. I
understand them conceptually, but when I try to create an instance I run
into problems. As a simple example, I create a class called ToInt:
> class ToCh a where
> int :: a -> Int
Then I create an instance:
> instance ToInt Int where:
> int n = n
However, when I try to use the function int :: Int -> Int at the hugs
prompt, I get the following error message:
Main> int 5
ERROR - Unresolved overloading
*** Type : (Num a, ToInt a) => Int
*** Expression : int 5
Can someone explain what the problem is, and how to interpret the error
message I'm getting?
thanks
_t
