Optional

sealed class Optional<T>

Types

Companion

common

object Companion

None

common

object None : Optional<Nothing>

Some

common

data class Some<T>(value: T) : Optional<T>

Functions

filter

common

abstract fun filter(predicate: (T) -> Boolean): Optional<out T>

map

common

abstract fun <R> map(function: (T) -> R): Optional<out R>

toSequence

common

abstract fun toSequence(): Sequence<T>

toString

common

abstract override fun toString(): String

Properties

isAbsent

common

val isAbsent: Boolean

isPresent

common

abstract val isPresent: Boolean

value

common

abstract val value: T?

Inheritors

Optional

Optional