Portability	portable
Stability	provisional
Maintainer	Edward Kmett <ekmett@gmail.com>
Safe Haskell	Safe

Data.Functor.Plus

Description

Synopsis

Documentation

class Alt f => Plus f whereSource

Laws:

 zero <!> m = m
 m <!> zero = m

If extended to an Alternative then zero should equal empty.

Methods

Instances

Plus []
Plus IO
Plus Maybe
Plus Seq
Plus IntMap
Plus Option
MonadPlus m => Plus (WrappedMonad m)
Plus f => Plus (IdentityT f)
Ord k => Plus (Map k)
(Bind f, Monad f) => Plus (MaybeT f)
(Apply f, Applicative f) => Plus (ListT f)
Alternative f => Plus (WrappedApplicative f)
ArrowPlus a => Plus (WrappedArrow a b)
Plus f => Plus (WriterT w f)
Plus f => Plus (WriterT w f)
(Bind f, Monad f, Error e) => Plus (ErrorT e f)
Plus f => Plus (StateT e f)
Plus f => Plus (StateT e f)
Plus f => Plus (ReaderT e f)
Plus f => Plus (Static f a)
Plus f => Plus (RWST r w s f)
Plus f => Plus (RWST r w s f)