This proposal will break every module which declares a monad instance
for some type. I expect that there will be many many broken
applications. Furthermore, if the only thing that I need is a monad
instance for some type, it is tedious do define Functor and
Applicative as well.
2010/12/14 John Smith
I would like to formally propose that Monad become a subclass of Applicative, with a call for consensus by 1 February. The change is described on the wiki at http://haskell.org/haskellwiki/Functor-Applicative-Monad_Proposal, and ticketed at http://hackage.haskell.org/trac/ghc/ticket/4834.
As this would require a change to the prelude, it will presumably be necessary for GHC and the Haskell report to change in tandem. The Haskell' committee expects proposals to have been implemented before changing the standard, so I will propose this to Haskell' after it is accepted for GHC. Hopefully this will be sufficient to avoid a race condition.
_______________________________________________ Libraries mailing list Libraries@haskell.org http://www.haskell.org/mailman/listinfo/libraries