compat/Data/Hashable.hs (30 lines of code) (raw):
-- Copyright (c) 2017 Uber Technologies, Inc.
--
-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in
-- all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-- THE SOFTWARE.
{-# OPTIONS_GHC -fno-warn-orphans #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE PackageImports #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE CPP #-}
module Data.Hashable (module X) where
import "hashable" Data.Hashable as X
#if !MIN_VERSION_hashable(1,2,5)
import Data.Functor.Identity
deriving instance Hashable a => Hashable (Identity a)
#endif