Thanks, that works. But how sould I change my class definition, so that it works without (2::Int), but just with 2? Ross Mellgren wrote:
You did not specify what type of number it is -- in Haskell numeric constants like "1" are actually typed as forall a. Num a -- that is, can be any type of Num.
Try: plus (2::Int) 3
-Ross
On Nov 9, 2009, at 1:44 PM, Paul Tokarev wrote:
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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