On Apr 28, 2008, at 16:22 , Fraser Wilson wrote:
> instance (Num a) => ValueClass a where
> fromValue (Value n) = fromInteger n
What I'm really confused by is the response to instance (Num a) =>
ValueClass a -- what I am trying to say is "if a is an instance of
Num, then can be an instance of ValueClass too, and here's how".
The format is instance [context =>] classname instance.
Your classname is ValueClass.
Your instance is a. a is not of the form (T a1 ... an).
(How to fix it? Not sure, and am trying to get myself out of here
and on the road :)
--
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] [EMAIL PROTECTED]
system administrator [openafs,heimdal,too many hats] [EMAIL PROTECTED]
electrical and computer engineering, carnegie mellon university KF8NH
_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
