Semigroup.hs

{-# LANGUAGE CPP                        #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE StandaloneDeriving         #-}
{-# LANGUAGE TemplateHaskell            #-}
{-# LANGUAGE TypeFamilies               #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}

{-|
Module:      Instances.Data.Semigroup
Copyright:   (C) 2014-2017 Ryan Scott
License:     BSD-style (see the file LICENSE)
Maintainer:  Ryan Scott
Stability:   Provisional
Portability: GHC

'Arbitrary' instances for datatypes in the "Data.Semigroup" module.
-}
module Instances.Data.Semigroup () where

import           Data.Semigroup (Min(..), Max(..), First(..), Last(..),
                                 WrappedMonoid(..), Option(..), Arg(..))
#if __GLASGOW_HASKELL__ < 702
import qualified Generics.Deriving.TH as Generics (deriveAll0)
#endif
import           Instances.Utils.GenericArbitrary (genericArbitrary)
import           Test.QuickCheck (Arbitrary(..))

deriving instance Arbitrary a => Arbitrary (Min a)
deriving instance Arbitrary a => Arbitrary (Max a)
deriving instance Arbitrary a => Arbitrary (First a)
deriving instance Arbitrary a => Arbitrary (Last a)
deriving instance Arbitrary a => Arbitrary (WrappedMonoid a)
deriving instance Arbitrary a => Arbitrary (Option a)

instance (Arbitrary a, Arbitrary b) => Arbitrary (Arg a b) where
    arbitrary = genericArbitrary

#if __GLASGOW_HASKELL__ < 702
$(Generics.deriveAll0 ''Arg)
#endif