{-# LANGUAGE Safe #-}-- |---- Module : Data.Functor.Identity-- Copyright : (c) Andy Gill 2001,-- (c) Oregon Graduate Institute of Science and Technology 2001-- License : BSD-style (see the file LICENSE)---- Maintainer : ross@soi.city.ac.uk-- Stability : stable-- Portability : portable---- The identity functor and monad.---- This trivial type constructor serves two purposes:---- * It can be used with functions parameterized by functor or monad classes.---- * It can be used as a base monad to which a series of monad-- transformers may be applied to construct a composite monad.-- Most monad transformer modules include the special case of-- applying the transformer to 'Identity'. For example, @State s@-- is an abbreviation for @StateT s 'Identity'@.---- @since 4.8.0.0moduleData.Functor.Identity (Identity (..))whereimportGHC.Internal.Data.Functor.Identity