Safe Haskell	Safe
Language	Haskell2010

Fcf.Class.Monoid.Types

Contents

Description

Carriers of useful monoid instances.

Synopsis

Endo

newtype Endo a Source #

Endofunctions.

Expand

This is is used in the default implementation of Foldr in terms of FoldMap.

Constructors

Endo (a -> Exp a)

Instances

type MEmpty Source #
Instance details Defined in Fcf.Class.Monoid.Types type MEmpty = Endo (Pure :: a -> a -> Type)
type (Endo f :: Endo a) <> (Endo g :: Endo a) Source #
Instance details Defined in Fcf.Class.Monoid.Types type (Endo f :: Endo a) <> (Endo g :: Endo a) = Endo (f <=< g)

type family UnEndo (e :: Endo a) :: a -> Exp a where ... Source #

Inverse of the Endo constructor.

Equations