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BehaviorRelay.swift
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BehaviorRelay.swift
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//
// BehaviorRelay.swift
// RxRelay
//
// Created by Krunoslav Zaher on 10/7/17.
// Copyright © 2017 Krunoslav Zaher. All rights reserved.
//
import RxSwift
/// BehaviorRelay is a wrapper for `BehaviorSubject`.
///
/// Unlike `BehaviorSubject` it can't terminate with error or completed.
public final class BehaviorRelay<Element>: ObservableType {
private let subject: BehaviorSubject<Element>
/// Accepts `event` and emits it to subscribers
public func accept(_ event: Element) {
self.subject.onNext(event)
}
/// Current value of behavior subject
public var value: Element {
// this try! is ok because subject can't error out or be disposed
return try! self.subject.value()
}
/// Initializes behavior relay with initial value.
public init(value: Element) {
self.subject = BehaviorSubject(value: value)
}
/// Subscribes observer
public func subscribe<Observer: ObserverType>(_ observer: Observer) -> Disposable where Observer.Element == Element {
self.subject.subscribe(observer)
}
/// - returns: Canonical interface for push style sequence
public func asObservable() -> Observable<Element> {
self.subject.asObservable()
}
/// Convert to an `Infallible`
///
/// - returns: `Infallible<Element>`
public func asInfallible() -> Infallible<Element> {
asInfallible(onErrorFallbackTo: .empty())
}
}