Re: [Haskell-beginners] Type classes and synonyms

21 Nov 2009

      Hi Philip

Aesthetics, taste, sanity, whatever... strongly suggest not doing it of course.

But there is (probably) little harm in trying it.

Best wishes

Stephen

2009/11/21 Philip Scott :
...
Oooh I had no idea you could do that with 'instance'

...
...
instance Num a => Num [a] where
  (+) = zipWith (+)
  (-) = zipWith (-)
  (*) = zipWith (*)
  fromInteger = repeat . fromInteger
  abs         = map abs
  signum      = map signum

Re: [Haskell-beginners] Type classes and synonyms

Stephen Tetley