phi

-----------------------------------------------------------------------------
-- |
-- Module      :  Data.Functor
-- Copyright   :  (c) 2020-2021 EMQ Technologies Co., Ltd.
-- License     :  BSD-style (see the LICENSE file)
--
-- Maintainer  :  Feng Lee, feng@emqx.io
--                Yang M, yangm@emqx.io
-- Stability   :  experimental
-- Portability :  portable
--
-- The Functor typeclass.
--
-----------------------------------------------------------------------------
module Data.Functor (class Functor, map, (<$>)) where

class Functor f where
  map :: forall a b. (a -> b) -> f a -> f b

infixl 4 map as <$>

instance Functor List where
  map = mapListImpl

foreign import mapListImpl :: forall a b. (a -> b) -> List a -> List b