-- 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
--   http:/<i>en.wikipedia.org</i>wiki/Three-valued_logic for values.
--   Depends on Aeson having missing value.
@package possible
@version 0.1.0.1

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 Eq a => Eq (Possible a)
instance Ord a => Ord (Possible a)
instance Show a => Show (Possible a)
instance Monad Possible
instance Applicative Possible
instance Functor Possible