Re: Proposal: Add the orphan instance Monoid e => Monad ((, )e) to Data.Monoid

12 Nov 2011


      Er. Yep.

Thats what I get for writing it inline rather than pasting =)

On Sat, Nov 12, 2011 at 3:41 PM, Erik Hesselink  wrote:
...
On Sat, Nov 12, 2011 at 21:29, Edward Kmett  wrote:
...
instance Monoid e => Monad ((,) e) where
        return a = (a, mempty)
This should probably be:
   return a = (mempty, a)
Erik