On 21 May 2008, at 9:25 am, Conal Elliott wrote:
I think the practice of constraint in type definitions is generally discouraged,
Is this true? If so, why? If I have a data type that simply doesn't make sense unless some of the type variables belong to certain classes, _shouldn't_ that be stated clearly in the declaration rather than hidden elsewhere? -- "I don't want to discuss evidence." -- Richard Dawkins, in an interview with Rupert Sheldrake. (Fortean times 232, p55.) _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
