[Haskell-cafe] type classes

[Lutz Donnerhacke]

* Peter Padawitz wrote:
> I'd like to define several instances of the same type class with the
> same type variable instance. Only method instances differ. How can I do
> this without writing copies of the type class?

Define the type class in a module named "MyClass". Define the each instance
in a module named "MyInstanceX" where X is a version number.

Include only the "MyInstanceX" module, you currently need.