[Haskell-cafe] Inheritance and Wrappers

John Lato jwlato at gmail.com
Tue Feb 1 13:50:25 CET 2011

On Tue, Feb 1, 2011 at 11:47 AM, Ozgur Akgun <ozgurakgun at gmail.com> wrote:

> 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?

Not to my knowledge.

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