Copyright	(c) Ross Paterson 2010
License	BSD-style (see the file LICENSE)
Maintainer	R.Paterson@city.ac.uk
Stability	experimental
Portability	portable
Safe Haskell	Safe
Language	Haskell98

Data.Functor.Compose

Description

Composition of functors.

Synopsis

Documentation

newtype Compose f g a infixr 9 Source

Right-to-left composition of functors. The composition of applicative functors is always applicative, but the composition of monads is not always a monad.

Constructors

Compose infixr 9
Fields getCompose :: f (g a)

Instances

(Functor f, Functor g) => Functor (Compose f g) Source
(Applicative f, Applicative g) => Applicative (Compose f g) Source
(Foldable f, Foldable g) => Foldable (Compose f g) Source
(Traversable f, Traversable g) => Traversable (Compose f g) Source
(Alternative f, Applicative g) => Alternative (Compose f g) Source
(Functor f, Show1 f, Show1 g) => Show1 (Compose f g) Source
(Functor f, Read1 f, Read1 g) => Read1 (Compose f g) Source
(Functor f, Ord1 f, Ord1 g) => Ord1 (Compose f g) Source
(Functor f, Eq1 f, Eq1 g) => Eq1 (Compose f g) Source
(Functor f, Eq1 f, Eq1 g, Eq a) => Eq (Compose f g a) Source
(Functor f, Ord1 f, Ord1 g, Ord a) => Ord (Compose f g a) Source
(Functor f, Read1 f, Read1 g, Read a) => Read (Compose f g a) Source
(Functor f, Show1 f, Show1 g, Show a) => Show (Compose f g a) Source