[Haskell-cafe] function arithmetic?

Christopher Howard christopher.howard at frigidcode.com
Sun Sep 1 09:06:46 CEST 2013

On 08/31/2013 09:27 PM, Charlie Paul wrote:
> I believe that this is what you want:
> http://www.haskell.org/haskellwiki/Num_instance_for_functions
> On Sat, Aug 31, 2013 at 10:01 PM, Christopher Howard
> <christopher.howard at frigidcode.com> wrote:

The author seemed to be subtly mocking the idea. It seemed to be 
suggesting that a Num instance for functions would imply the need for 
constant number functions, which leads to difficulties. But I don't see 
why one would have to take it that far.

In any case, I just tried the NumInstances package from Hackage and it 
seems to work great.

More information about the Haskell-Cafe mailing list