-- Hoogle documentation, generated by Haddock
-- See Hoogle, http://www.haskell.org/hoogle/


-- | Three valued Data.Maybe
--   
--   Maybe lacks the information if Nothing represents missing or empty
--   value. The idea is to have
--   <a>http://en.wikipedia.org/wiki/Three-valued_logic</a> for values.
--   Depends on Aeson having missing value.
@package possible
@version 0.1.0.6

module Data.Possible
data Possible a
HaveNull :: Possible a
MissingData :: Possible a
HaveData :: a -> Possible a
possible :: b -> b -> (a -> b) -> Possible a -> b
isPossibleData :: Possible a -> Bool
isPossibleMissing :: Possible a -> Bool
isPossibleNull :: Possible a -> Bool
fromHaveData :: Possible a -> a
instance GHC.Generics.Generic (Data.Possible.Possible a)
instance GHC.Show.Show a => GHC.Show.Show (Data.Possible.Possible a)
instance GHC.Base.Functor Data.Possible.Possible
instance GHC.Base.Applicative Data.Possible.Possible
instance GHC.Base.Monad Data.Possible.Possible
instance Control.Monad.Fail.MonadFail Data.Possible.Possible