Data.Aeson.AutoType.Alternative

This module defines data type (a :|: b) that behaves all like Either, except that has no tag in JSON representation as used by FromJSON and ToJSON.

Documentation

data a :|: b infixr 5

Data type (a :|: b) that behaves all like Either, except that has no tag in JSON representation as used by FromJSON and ToJSON.

Constructors

AltLeft a

AltRight b

Instances

(Eq b, Eq a) => Eq ((:|:) a b)

Methods

(==) :: (a :|: b) -> (a :|: b) -> Bool

(/=) :: (a :|: b) -> (a :|: b) -> Bool

(Ord b, Ord a) => Ord ((:|:) a b)

Methods

compare :: (a :|: b) -> (a :|: b) -> Ordering

(<) :: (a :|: b) -> (a :|: b) -> Bool

(<=) :: (a :|: b) -> (a :|: b) -> Bool

(>) :: (a :|: b) -> (a :|: b) -> Bool

(>=) :: (a :|: b) -> (a :|: b) -> Bool

max :: (a :|: b) -> (a :|: b) -> a :|: b

min :: (a :|: b) -> (a :|: b) -> a :|: b

(Show b, Show a) => Show ((:|:) a b)

Methods

showsPrec :: Int -> (a :|: b) -> ShowS

show :: (a :|: b) -> String

showList :: [a :|: b] -> ShowS

(ToJSON a, ToJSON b) => ToJSON ((:|:) a b)

Methods

toJSON :: (a :|: b) -> Value

toEncoding :: (a :|: b) -> Encoding

toJSONList :: [a :|: b] -> Value

toEncodingList :: [a :|: b] -> Encoding

(FromJSON a, FromJSON b) => FromJSON ((:|:) a b)

Methods

parseJSON :: Value -> Parser (a :|: b)

parseJSONList :: Value -> Parser [a :|: b]

toEither :: (a :|: b) -> Either a b

Convert to Either datatype.

fromEither :: Either a b -> a :|: b

Convert from Either datatype.

alt :: (a -> c) -> (b -> c) -> (a :|: b) -> c

Deconstruct the type with two functions corresponding to constructors. This is like either.