Safe Haskell	Safe
Language	Haskell2010

Data.Functor.Composition

Synopsis

class Composition (o :: (Type -> Type) -> (Type -> Type) -> Type -> Type) where
- decompose :: o f g x -> f (g x)
- compose :: f (g x) -> o f g x

Documentation

class Composition (o :: (Type -> Type) -> (Type -> Type) -> Type -> Type) where Source #

We often need to distinguish between various forms of Functor-like composition in Haskell in order to please the type system. This lets us work with these representations uniformly.

Methods

decompose :: o f g x -> f (g x) Source #

compose :: f (g x) -> o f g x Source #

Instances

Instances details

Composition (Compose :: (Type -> Type) -> (Type -> Type) -> Type -> Type) Source #
Instance details Defined in Data.Functor.Composition Methods decompose :: Compose f g x -> f (g x) Source # compose :: f (g x) -> Compose f g x Source #