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


-- | Extra utilities for working on Data.* types.
--   
--   Extra utilities for working on Data.* types.
@package data-extra
@version 1.0.0


-- | Extra functions for dealing with Maybe.
module Data.Maybe.Extra

-- | When the predicate is true, return maybe the action's return value.
whenMaybe :: Monad m => Bool -> m a -> m (Maybe a)


-- | Extra functions for dealing with Either.
module Data.Either.Extra

-- | A map for Either values.
mapEither :: (a -> b1) -> (b -> b2) -> Either a b -> Either b1 b2

-- | Maybe get the left side of an Either.
leftToMaybe :: Either a b -> Maybe a

-- | Maybe get the right side of an Either.
rightToMaybe :: Either a b -> Maybe b

-- | Is a value Left?
isLeft :: Either a b -> Bool

-- | Is a value Right?
isRight :: Either a b -> Bool

-- | Extract the left value or a default.
fromLeft :: a -> Either a b -> a

-- | Extract the right value or a default.
fromRight :: b -> Either a b -> b