[Haskell-cafe] Re: Definition of hidden instance members (bug in GHC or Hugs+Yhc)

This is either a GHC bug, or a Yhc+Hugs bug - I'm not sure which, but the compilers disagree:

import Prelude hiding ((==)) data Foo = Foo instance Eq Foo where (==) a b = True

I was thinking that GHC's behaviour seems more sensible, but the following fails: import qualified Module as M instance MClass Foo where M.foo = undefined M. is not allowed as a prefix of a function, which makes resolving ambiguities hard unless the compiler solves the issue for you (as Hugs and Yhc do) Thanks Neil