Monad instance for Monoid e => (,) e

John Wiegley johnw at
Thu Jul 25 21:09:52 CEST 2013

>>>>> Edward Kmett <ekmett at> writes:

> I continue to be strongly in favor of adding this instance as it is a
> fundamental variant of the Writer Monad, and is analogous to the Monad/
> MonadReader instances for (->) e.

+1, also for this reason.

John Wiegley
FP Complete                         Haskell tools, training and consulting               johnw on #haskell/

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