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