On Sun, Aug 14, 2011 at 12:36, Brent Yorgey <byorgey@seas.upenn.edu> wrote:
On Sat, Aug 13, 2011 at 02:47:04PM -0400, Brandon Allbery wrote:
> Isn't this just mconcat?

No. The Monoid instance for Maybe defined in Data.Monoid is the one
which lifts a Monoid instance on a to a Monoid instance on Maybe a.

Yeh, as usual I realized that about 5 minutes after sending, by which time someone else had already pointed it out.

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