Hi David, On Fri, May 17, 2013 at 08:32:09PM +0200, David Luposchainsky wrote:
[Maybe] this would be better discussed on the ghc-devs@ list I thought that as well, but SPJ said this might be a better place, as it mostly concerns the base libraries. Since the discussion started here, I think we shouldn't change lists. (Maybe if individual problems arise those could be discussed individually over there.)
Ah, so you're talking about the GHC code /and/ all of the libraries that come with GHC? I'd be in favour of adding the instances to the libraries.
Suppose 7.8 includes all instances as proposed, and we're going up to 7.14 in a couple of years, and 8.0 introduces the new hierarchy. Everything down to 7.8 will be compilable by 8.0
No, it won't. Unrelated to this proposal, you can't build GHC version X with GHC version Y, where Y > X. Thanks Ian -- Ian Lynagh, Haskell Consultant Well-Typed LLP, http://www.well-typed.com/