Data/Functor.hs

{-# LANGUAGE Trustworthy #-}

-----------------------------------------------------------------------------
-- |
-- Module : Data.Functor
-- Copyright : (c) The University of Glasgow 2001
-- License : BSD-style (see the file libraries/base/LICENSE)
-- 
-- Maintainer : libraries@haskell.org
-- Stability : provisional
-- Portability : portable
--
-- Functors: uniform action over a parameterized type, generalizing the
-- 'map' function on lists.

module Data.Functor
 (
 Functor(fmap),
 (<$),
 ($>),
 (<$>),
 void,
 ) where

import Control.Monad
import GHC.Base (Functor(..))

infixl 4 <$>

-- | An infix synonym for 'fmap'.
(<$>) :: Functor f => (a -> b) -> f a -> f b
(<$>) = fmap

infixl 4 $>

-- | Flipped version of '<$'.
--
-- /Since: 4.7.0.0/
($>) :: Functor f => f a -> b -> f b
($>) = flip (<$)