[Haskell-cafe] classes question

[Paul Tokarev]

Hi.

I am using Hugs 98
I have that piece of code:

class PlusTimes a where
   plus :: a -> a -> a

instance PlusTimes Int where
   plus x y = x + y

when I run : "plus 2 3" I get this error:
ERROR - Unresolved overloading
*** Type       : (Num a, PlusTimes a) => a
*** Expression : plus 2 3

What am I doing wrong?
Thanks.

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