fay-base-0.19.4: The base package for Fay.

Data.Either

Description

Either operations.

Synopsis

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 -> BoolSource

Usual isLeft.

isRight :: Either a b -> BoolSource

Usual isRight.