On Monday 05 October 2009 11:58:28 pm Henning Thielemann wrote: > On Mon, 5 Oct 2009, Soenke Hahn wrote: > > On Monday 05 October 2009 10:14:02 pm Henning Thielemann wrote: > >> I use NumericPrelude that has more fine grained type classes. E.g. (+) > >> is in Additive and (*) is in Ring. > >> > >> http://hackage.haskell.org/package/numeric-prelude > > > > That is pretty cool, thanks. How do your import statements look like, > > when you use numeric-prelude? Mine look a bit ugly: > > > > import Prelude hiding ((+), (-), negate) > > import Algebra.Additive ((+), (-), negate) > > {-# LANGUAGE NoImplicitPrelude #-} > > or > > import Prelude () > > and > > import qualified Algebra.Additive as Additive (e.g. for Additive.C) > import NumericPrelude > import PreludeBase > > The first form is necessary if you use number literals, what is the case > for you I think. >
Thanks. If you want to use number literals, you have to implement an instance for Algebra.Ring.C, if i understand correctly. Is there any special reason, why fromInteger is a method of Algebra.Ring.C? Sönke _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
