--- /dev/null
+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>;
+}