Hi Chris, On 19 March 2012 17:58, Chris Smith <[email protected]> wrote:
> On Mar 19, 2012 11:40 AM, "Ozgur Akgun" <[email protected]> wrote: > > {-# LANGUAGE FlexibleInstances #-} > > > > instance Num a => Num (a -> a) where > > You don't want (a -> a) there. You want (b -> a). There is nothing about > this that requires functions to come from a numeric type, much less the > same one. > Thanks for catching this one, you are absolutely correct. I was carried away by the original post using "Float -> Float" for the example functions. Cheers, Ozgur
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