pqueue-1.4.1.3: src/Control/Applicative/Identity.hs

module Control.Applicative.Identity where

import Control.Applicative

import Prelude

newtype Identity a = Identity { runIdentity :: a }

instance Functor Identity where
  fmap f (Identity x) = Identity (f x)

instance Applicative Identity where
  pure = Identity
  Identity f <*> Identity x = Identity (f x)