module NewtypeZoo.Missing
( Missing(Missing)
, _theMissing
, theMissing
) where
import Control.DeepSeq (NFData)
import Control.Monad.Fix (MonadFix)
import Control.Monad.Zip (MonadZip)
import Data.Bits (Bits,FiniteBits)
import Data.Copointed (Copointed)
import Data.Default (Default)
import Data.Functor.Classes (Eq1, Ord1, Read1, Show1)
import Data.Functor.Identity
import Data.Ix (Ix)
import Data.Profunctor (Profunctor, dimap)
import Data.Pointed (Pointed)
import Data.String (IsString)
import Data.Typeable (Typeable)
import Foreign.Storable (Storable)
import GHC.Generics (Generic, Generic1)
import System.Random (Random)
import Test.QuickCheck (Arbitrary)
newtype Missing a = Missing a
deriving ( Eq
, Ord
, Read
, Show
, NFData
, Foldable
, Traversable
, Functor
, Default
, Monoid
, Semigroup
, Typeable
, Generic
, Generic1
, Random
, Arbitrary
, Bounded
, Enum
, Floating
, Fractional
, Integral
, Num
, Real
, RealFloat
, RealFrac
, Ix
, IsString
, Bits
, FiniteBits
)
deriving ( Eq1
, Ord1
, Read1
, Show1
, Pointed
, Copointed
, Applicative
, MonadFix
, Monad
, MonadZip
)
via Identity
_theMissing :: Missing x -> x
_theMissing (Missing !x) = x
{-# INLINE _theMissing #-}
theMissing :: forall a b p f. (Profunctor p, Functor f) => p a (f b) -> p (Missing a) (f (Missing b))
theMissing = dimap _theMissing (fmap Missing)
{-# INLINE theMissing #-}