kotlin-stdlib/kotlin.coroutines/CoroutineContext

CoroutineContext

Persistent context for the coroutine. It is an indexed set of Element instances. An indexed set is a mix between a set and a map. Every element in this set has a unique Key.

Since Kotlin

1.3

Types

Element

interface Element : CoroutineContext

An element of the CoroutineContext. An element of the coroutine context is a singleton context by itself.

Key

interface Key<E : CoroutineContext.Element>

Key for the elements of CoroutineContext. E is a type of element with this key.

Functions

fold

abstract fun <R> fold(initial: R, operation: (R, CoroutineContext.Element) -> R): R

Accumulates entries of this context starting with initial value and applying operation from left to right to current accumulator value and each element of this context.

get

abstract operator fun <E : CoroutineContext.Element> get(key: CoroutineContext.Key<E>): E?

Returns the element with the given key from this context or null.

minusKey

abstract fun minusKey(key: CoroutineContext.Key<*>): CoroutineContext

Returns a context containing elements from this context, but without an element with the specified key.

plus

open operator fun plus(context: CoroutineContext): CoroutineContext

Returns a context containing elements from this context and elements from other context. The elements from this context with the same key as in the other one are dropped.

Inheritors

Element

EmptyCoroutineContext