Copyright	(C) 2011-2015 Edward Kmett
License	BSD-style (see the file LICENSE)
Maintainer	Edward Kmett <ekmett@gmail.com>
Stability	provisional
Portability	portable
Safe Haskell	Safe
Language	Haskell98

Data.Functor.Plus

Description

Synopsis

Documentation

class Alt f => Plus f where Source #

Laws:

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

If extended to an Alternative then zero should equal empty.

Minimal complete definition

zero

Methods

zero :: f a Source #

Instances

Plus [] Source #
Methods zero :: [a] Source #
Plus Maybe Source #
Methods zero :: Maybe a Source #
Plus IO Source #
Methods zero :: IO a Source #
Plus Option Source #
Methods zero :: Option a Source #
Plus Seq Source #
Methods zero :: Seq a Source #
Plus IntMap Source #
Methods zero :: IntMap a Source #
MonadPlus m => Plus (WrappedMonad m) Source #
Methods zero :: WrappedMonad m a Source #
Ord k => Plus (Map k) Source #
Methods zero :: Map k a Source #
Plus f => Plus (Lift f) Source #
Methods zero :: Lift f a Source #
(Bind f, Monad f) => Plus (MaybeT f) Source #
Methods zero :: MaybeT f a Source #
(Apply f, Applicative f) => Plus (ListT f) Source #
Methods zero :: ListT f a Source #
Alternative f => Plus (WrappedApplicative f) Source #
Methods zero :: WrappedApplicative f a Source #
ArrowPlus a => Plus (WrappedArrow a b) Source #
Methods zero :: WrappedArrow a b a Source #
Plus f => Plus (IdentityT * f) Source #
Methods zero :: IdentityT * f a Source #
Plus f => Plus (Reverse * f) Source #
Methods zero :: Reverse * f a Source #
Plus f => Plus (Backwards * f) Source #
Methods zero :: Backwards * f a Source #
Plus f => Plus (WriterT w f) Source #
Methods zero :: WriterT w f a Source #
Plus f => Plus (WriterT w f) Source #
Methods zero :: WriterT w f a Source #
Plus f => Plus (StateT e f) Source #
Methods zero :: StateT e f a Source #
Plus f => Plus (StateT e f) Source #
Methods zero :: StateT e f a Source #
(Bind f, Monad f, Error e) => Plus (ErrorT e f) Source #
Methods zero :: ErrorT e f a Source #
(Bind f, Monad f, Semigroup e, Monoid e) => Plus (ExceptT e f) Source #
Methods zero :: ExceptT e f a Source #
Plus f => Plus (Static f a) Source #
Methods zero :: Static f a a Source #
(Plus f, Plus g) => Plus (Product * f g) Source #
Methods zero :: Product * f g a Source #
Plus f => Plus (ReaderT * e f) Source #
Methods zero :: ReaderT * e f a Source #
(Plus f, Functor g) => Plus (Compose * * f g) Source #
Methods zero :: Compose * * f g a Source #
Plus f => Plus (RWST r w s f) Source #
Methods zero :: RWST r w s f a Source #
Plus f => Plus (RWST r w s f) Source #
Methods zero :: RWST r w s f a Source #

module Data.Functor.Alt