possible-0.1.0.1: Three valued Data.Maybe

Safe Haskell	Safe-Inferred
Language	Haskell2010

Data.Possible

Documentation

data Possible a Source

Constructors

HaveNull
MissingData
HaveData a

Instances

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

possible :: b -> b -> (a -> b) -> Possible a -> b Source

isPossibleData :: Possible a -> Bool Source

isPossibleMissing :: Possible a -> Bool Source

isPossibleNull :: Possible a -> Bool Source

fromHaveData :: Possible a -> a Source