On Tue, Jun 30, 2009 at 3:56 PM, Ross Paterson <ross@soi.city.ac.uk> wrote:

On Tue, Jun 30, 2009 at 03:39:39PM -0700, John Meacham wrote:
> (+>) seems to imply to me that the operator is non-associative.

It does seem to imply some asymmetry between the arguments.

Well, the canonical instance of Monoid is to mappend over lists, where it doesn't commute, so I think that the pointiness of the operator makes a reasonable kind of sense.