[Haskell-beginners] Simpler than lifting

[Brandon Allbery]

On Mon, Mar 18, 2013 at 9:59 AM, Adrian May
<adrian.alexander.may at gmail.com>wrote:

> infixl 6 ~+, ~-
> f ~+ g = \p -> f p + g p
> f ~- g = \p -> f p - g p
>
> but I feel that the prelude must have already taken care of such things.
> What's the proper way to do it?
>

Not in the Prelude (which is specified by the Haskell Language Report and
difficult to change), but I think you want to look at Control.Applicative.

-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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