[Haskell-cafe] Inheritance and Wrappers

[Ozgur Akgun]

On 1 February 2011 11:41, John Lato <jwlato at gmail.com> wrote:

> The important point is that this declares an AbGroup instance for every
> type, not just types with Num instances.
>

So, is there a way to declare an AbGroup instance for the types with num
instances only?

Thanks,
Ozgur
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/haskell-cafe/attachments/20110201/183ecc74/attachment.htm>