File: Maybe.hs

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module Maybe(
    isJust, isNothing,
    fromJust, fromMaybe, listToMaybe, maybeToList,
    catMaybes, mapMaybe,

    -- ...and what the Prelude exports
    Maybe(Nothing, Just),
    maybe
  ) where

isJust, isNothing    :: Maybe a -> Bool
fromJust             :: Maybe a -> a
fromMaybe            :: a -> Maybe a -> a
listToMaybe          :: [a] -> Maybe a
maybeToList          :: Maybe a -> [a]
catMaybes            :: [Maybe a] -> [a]
mapMaybe             :: (a -> Maybe b) -> [a] -> [b]