-- Hoogle documentation, generated by Haddock -- See Hoogle, http://www.haskell.org/hoogle/ -- | Essentially the Maybe type with error messages. -- -- This is a very simple type: -- --

--   data Exceptional x
--     = Failure String
--     | Success x
--

-- -- It's much like Maybe, except instead of Nothing, we -- have Failure String. -- -- A comparison could also be made to Either String. I made this -- library because I was dissatisfied with the Monad instance -- for Either. In this type, fail = Failure. It's -- rather simple. -- -- Changes -- --

0.1.3.0 Fixed a typo. 0.1.2.0 won't build. Also added -- definition of empty for Alternative.
0.1.2.0 Add fromEither and toEither -- functions.
0.1.1.3 Hackage is terrible. Yet another formatting -- fix.
0.1.1.2 Yet another formatting fix.
0.1.1.1 Formatting fix to the haddock documentation.
0.1.1.0 Add runExceptional function.
0.1.0.1 Minor documentation changes. No changes to the -- API.
0.1.0.0 Initial version

@package exceptional @version 0.1.3.0 module Control.Exceptional -- | This is basically specialized 'Either String', or Maybe with -- error messages. data Exceptional x [Failure] :: String -> Exceptional x [Success] :: x -> Exceptional x -- | Convert Exceptional into another Monad runExceptional :: Monad m => Exceptional x -> m x -- | Convert an Either String to an Exceptional fromEither :: Either String a -> Exceptional a -- | Convert an Exceptional to an Either String toEither :: Exceptional a -> Either String a instance Read x => Read (Exceptional x) instance Show x => Show (Exceptional x) instance Eq x => Eq (Exceptional x) instance Functor Exceptional instance Applicative Exceptional instance Alternative Exceptional instance Monad Exceptional