patch applied (ghc): Deriving for indexed newtypes

[email protected] Tue, 19 Dec 2006 13:35:49 -0800

Newsgroups	gmane.comp.lang.haskell.cvs.all,gmane.comp.lang.haskell.cvs.ghc
Message-ID	<[email protected]>

Tue Dec 19 13:30:17 PST 2006  Manuel M T Chakravarty <[email protected]>
  * Deriving for indexed newtypes
  - The isomorphism-based newtype-deriving isn't very useful for indexed types
    right now as it rejects all recursive declarations, and we have to mark
    all indexed type instances as recurrsive as we can't guarantee that future
    instances aren't going to make them part of a recursive group.

    M ./compiler/typecheck/TcDeriv.lhs -16 +47