Re: Is there already a list class?

Is here the right place to request a list class? eg class List l e where (:) :: e -> l e -> l e head :: ..

This might be used in Data.Set, Data.Map

class StorableAsList l e t where fromList :: l e -> t toList :: t -> l e

I'd like to help implementing/ writing it.

Do you consider this beeing a useful enhancement?

I was looking for such a class just yesterday. I wanted a difference list over LazyByteString, and it seemed wrong just to rewrite Don Stewart's DList for byte strings without first having a list class. I would also like to help implement it.