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Control.Monad.Monoid

Portability	non-portable ( requires mulit-parameter type classes )
Stability	experimental
Maintainer	libraries@haskell.org

Description

Declaration of the Monoid class,and instances for list and functions

Inspired by the paper Functional Programming with Overloading and Higher-Order Polymorphism, Mark P Jones (http://www.cse.ogi.edu/~mpj) Advanced School of Functional Programming, 1995.

class Monoid a where

Methods

mempty :: a

mappend :: a -> a -> a

mconcat :: [a] -> a

Instances

Monoid [a]

Monoid (a -> a)

Monoid ()

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