Re: Monoid Instance for ReaderT

+1 On Tue, Nov 28, 2017 at 2:22 PM, M Farkas-Dyck wrote:

On 28/11/2017, Andrew Martin wrote:

...

instance (Applicative m, Monoid a) => Monoid (ReaderT r m a)

...

I believe there is good reason to prefer the first instance over the other two.

+1

This is also how the `Monoid` instance of `(->)` is defined. _______________________________________________ Libraries mailing list Libraries@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/libraries