I think haskell2010's type system is just not expressive enough to create interface generic enough. It's not possible to create type class which will work for both ByteStrings (or IntSet) and lists.
It seems that most people agree: The reason why we don't have container classes is that it's difficult to define them in a completely type-safe mannar.
(The OOP people, of course, just don't bother trying. They use typecasts everywhere...)
Do associated types solve this? Or are there still problems? _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
