[Haskell-cafe] Monoid wants a (++) equivalent
daniel.is.fischer at web.de
Tue Jun 30 16:19:13 EDT 2009
Am Dienstag 30 Juni 2009 20:56:10 schrieb David Leimbach:
> On Tue, Jun 30, 2009 at 11:54 AM, Brent Yorgey <byorgey at seas.upenn.edu>wrote:
> > On Tue, Jun 30, 2009 at 09:45:45AM -0700, Bryan O'Sullivan wrote:
> > > I've thought for a while that it would be very nice indeed if the
> > > Monoid class had a more concise operator for infix appending than "a
> > > `mappend`
> > b".
> > > I wonder if other people are of a similar opinion, and if so, whether
> > this
> > > is worth submitting a libraries@ proposal over.
> > +1.
> > IIRC Jules Bean has proposed using (+>) for this purpose, which I
> > like. It has the advantages of (a) not clashing with any other
> > (common) operators, (b) making more obvious the fact that mappend is
> > not necessarily commutative, and (c) providing the obvious (<+) for
> > 'flip mappend' which is sometimes useful.
> I actually think this proposal is pretty excellent.
I actually think your assessment of the proposal is correct.
More information about the Haskell-Cafe