Proposal (Trac ticket #3524): Add mfilter to Control.Monad

[Jon Fairbairn]

Jon Fairbairn <jon.fairbairn at cl.cam.ac.uk> writes:

> Following on from the discussion of #3453, I propose the addition of
> mfilter to Control.Monad. It's just List.filter for any MonadPlus. 

[...]

> Time limit for discussion: 1 October.

That looks like nem. con. to me.  Please can someone commit it?

-- 
Jón Fairbairn                                 Jon.Fairbairn at cl.cam.ac.uk