On Fri, 2009-06-12 at 15:00 +0100, Paul Keir wrote: > Thanks Ryan, I'm slowly becoming aware of the effects of Monomorphism. > I'll look > again at Neil Mitchell's blog post. > > I guess it's the same thing when I try: > > > let a = 1 > > a + 1.0 > > I'm taking the "mono" as a clue that the type inferencing will > complete after each ghci carriage return; once only. In this example > when "a" is set, it is to an Integer. One might imagine ghci could > wait until I use "a" somewhere, but that's not how things are.
Or be explicit about it and give it a polymorphic type: Prelude> let a :: Num a => a; a = 1 Prelude> :t a a :: (Num a) => a Prelude> a + 1.0 2.0 Duncan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
