Re: [Haskell-cafe] closed classes

Duncan Coutts writes:

closed class GConfValue v where

Hmm...doesn't --8<-- module Closed(foo) where class C a where foo = ... instance C ... --8<-- module Main where import Closed ...foo... --8<-- do what you want? You can only use existing instances of C, but not declare them (outside of the Closed module), IIUC. -ketil -- If I haven't seen further, it is by standing in the footprints of giants