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import { PartialObserver } from './types';
import { Observable } from './Observable';
/**
* @deprecated NotificationKind is deprecated as const enums are not compatible with isolated modules. Use a string literal instead.
*/
export declare enum NotificationKind {
NEXT = "N",
ERROR = "E",
COMPLETE = "C"
}
/**
* Represents a push-based event or value that an {@link Observable} can emit.
* This class is particularly useful for operators that manage notifications,
* like {@link materialize}, {@link dematerialize}, {@link observeOn}, and
* others. Besides wrapping the actual delivered value, it also annotates it
* with metadata of, for instance, what type of push message it is (`next`,
* `error`, or `complete`).
*
* @see {@link materialize}
* @see {@link dematerialize}
* @see {@link observeOn}
*
* @class Notification<T>
*/
export declare class Notification<T> {
kind: 'N' | 'E' | 'C';
value?: T;
error?: any;
hasValue: boolean;
constructor(kind: 'N' | 'E' | 'C', value?: T, error?: any);
/**
* Delivers to the given `observer` the value wrapped by this Notification.
* @param {Observer} observer
* @return
*/
observe(observer: PartialObserver<T>): any;
/**
* Given some {@link Observer} callbacks, deliver the value represented by the
* current Notification to the correctly corresponding callback.
* @param {function(value: T): void} next An Observer `next` callback.
* @param {function(err: any): void} [error] An Observer `error` callback.
* @param {function(): void} [complete] An Observer `complete` callback.
* @return {any}
*/
do(next: (value: T) => void, error?: (err: any) => void, complete?: () => void): any;
/**
* Takes an Observer or its individual callback functions, and calls `observe`
* or `do` methods accordingly.
* @param {Observer|function(value: T): void} nextOrObserver An Observer or
* the `next` callback.
* @param {function(err: any): void} [error] An Observer `error` callback.
* @param {function(): void} [complete] An Observer `complete` callback.
* @return {any}
*/
accept(nextOrObserver: PartialObserver<T> | ((value: T) => void), error?: (err: any) => void, complete?: () => void): any;
/**
* Returns a simple Observable that just delivers the notification represented
* by this Notification instance.
* @return {any}
*/
toObservable(): Observable<T>;
private static completeNotification;
private static undefinedValueNotification;
/**
* A shortcut to create a Notification instance of the type `next` from a
* given value.
* @param {T} value The `next` value.
* @return {Notification<T>} The "next" Notification representing the
* argument.
* @nocollapse
*/
static createNext<T>(value: T): Notification<T>;
/**
* A shortcut to create a Notification instance of the type `error` from a
* given error.
* @param {any} [err] The `error` error.
* @return {Notification<T>} The "error" Notification representing the
* argument.
* @nocollapse
*/
static createError<T>(err?: any): Notification<T>;
/**
* A shortcut to create a Notification instance of the type `complete`.
* @return {Notification<any>} The valueless "complete" Notification.
* @nocollapse
*/
static createComplete(): Notification<any>;
}