Data.Either
Description
Either operations.
whenLeft :: Either a b -> (a -> Fay c) -> Fay (Maybe c) Source #
Basically forM.
whenRight :: Either a b -> (b -> Fay c) -> Fay (Maybe c) Source #
isLeft :: Either a b -> Bool Source #
Usual isLeft.
isRight :: Either a b -> Bool Source #
Usual isRight.