On Mon, Jan 05, 2009 at 09:32:21AM +0100, Henning Thielemann wrote:
On Mon, 5 Jan 2009, Ross Paterson wrote:
On Mon, Jan 05, 2009 at 01:07:00AM +0100, Henning Thielemann wrote:
However, Control.Monad.Identity would conflict with MTL.
Unfortunately that is necessary to make the split work. If we have a monad-classes-fd package, clients would have to depend on both it and transformers.
How about Control.Monad.Trans.Identity which is re-exported by Control.Monad.Identity in mtl?
Hmm, it's a conflict between co-existing with mtl and using the Right Name for the transformers package, which is intended to be usable by itself. I prefer the latter, myself.
I also like to have a function 'state', which replaces the former 'State' constructor. I can also submit a patch if you want that.
You mean state :: (s -> (a, s)) -> State s a state f = StateT (Identity . f) and similarly for all the others? Sounds reasonable.