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Data.Either Portability portable Stability experimental Maintainer libraries@haskell.org

Description

The Either type, and associated operations.

Synopsis

data Either a b = Left a | Right b either :: (a -> c) -> (b -> c) -> Either a b -> c

Documentation

data Either a b

The Either type represents values with two possibilities: a value of type Either a b is either Left a or Right b. The Either type is sometimes used to represent a value which is either correct or an error8 > Stability experimental Maintainer libraries@haskell.org

The Dynamic interface provides basic support for dynamic types.

Operations for injecting values of arbitrary type into a dynamically typed value, Dynamic, are provided, together with operations for converting dynamic values into a concrete (monomorphic) type.