Note the live version of this on haskell wiki is at: http://www.haskell.org/haskellwiki/Wrapper_types The link below is for the old non-editible version of the haskel wiki. On Thu, 2007-03-15 at 15:34 -0600, Derek Elkins wrote:
Wolfgang Jeltsch wrote:
Am Donnerstag, 15. März 2007 03:23 schrieb Daniel Mahler:
Is there any way for the same type to implement a typeclass multiple ways.
You can wrap the type using newtype, thus creating a new type which can implement type class methods differently.
This technique is sometimes known as a typeclass wrapper and is related to wrapper types and combines well with phantom types. See http://www.haskell.org/hawiki/WrapperTypes _______________________________________________ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell