Re: Monoid instance for IO

On 2014-11-13 at 16:13:09 +0100, Gabriel Gonzalez wrote:

I would like to add the following `Monoid` instance for `IO` to Data.Monoid`:

``` instance Monoid a => Monoid (IO a) where mempty = pure mempty mappend = liftA2 mappend ```

seems reasonable to me, +1 from me Cheers, hvr PS: There was a related discussion earlier this year at http://thread.gmane.org/gmane.comp.lang.haskell.glasgow.user/24835/focus=248... mentioning "instance Monoid a => Monoid (IO a)" already