Either

sealed class Either<out L, out R>

Types

data class Left<out L, Nothing>(val value: L) : Either<L, Nothing>

data class Right<Nothing, out R>(val value: R) : Either<Nothing, R>

inline fun <X> fold(fl: (L) -> X, fr: (R) -> X): X

inline fun <X> map(f: (R) -> X): Either<L, X>

inline fun <X, Y> transform(fl: (L) -> X, fr: (R) -> Y): Either<X, Y>

abstract val isLeft: Boolean

abstract val isRight: Boolean

abstract val left: L?

abstract val right: R?

inline fun <L, R, X> Either<L, R>.flatMap(f: (R) -> Either<L, X>): Either<L, X>

fun <L, R> Either<L, R>.getOrDefault(defaultValue: R): R

inline fun <L, R> Either<L, R>.getOrElse(onLeft: (L) -> R): R