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import { Operator } from './Operator';
import { Subscriber } from './Subscriber';
import { Subscription } from './Subscription';
import { TeardownLogic, OperatorFunction, Subscribable, Observer } from './types';
/**
* A representation of any set of values over any amount of time. This is the most basic building block
* of RxJS.
*
* @class Observable<T>
*/
export declare class Observable<T> implements Subscribable<T> {
/**
* @deprecated Internal implementation detail, do not use directly. Will be made internal in v8.
*/
source: Observable<any> | undefined;
/**
* @deprecated Internal implementation detail, do not use directly. Will be made internal in v8.
*/
operator: Operator<any, T> | undefined;
/**
* @constructor
* @param {Function} subscribe the function that is called when the Observable is
* initially subscribed to. This function is given a Subscriber, to which new values
* can be `next`ed, or an `error` method can be called to raise an error, or
* `complete` can be called to notify of a successful completion.
*/
constructor(subscribe?: (this: Observable<T>, subscriber: Subscriber<T>) => TeardownLogic);
/**
* Creates a new Observable by calling the Observable constructor
* @owner Observable
* @method create
* @param {Function} subscribe? the subscriber function to be passed to the Observable constructor
* @return {Observable} a new observable
* @nocollapse
* @deprecated Use `new Observable()` instead. Will be removed in v8.
*/
static create: (...args: any[]) => any;
/**
* Creates a new Observable, with this Observable instance as the source, and the passed
* operator defined as the new observable's operator.
* @method lift
* @param operator the operator defining the operation to take on the observable
* @return a new observable with the Operator applied
* @deprecated Internal implementation detail, do not use directly. Will be made internal in v8.
* If you have implemented an operator using `lift`, it is recommended that you create an
* operator by simply returning `new Observable()` directly. See "Creating new operators from
* scratch" section here: https://rxjs.dev/guide/operators
*/
lift<R>(operator?: Operator<T, R>): Observable<R>;
subscribe(observerOrNext?: Partial<Observer<T>> | ((value: T) => void)): Subscription;
/** @deprecated Instead of passing separate callback arguments, use an observer argument. Signatures taking separate callback arguments will be removed in v8. Details: https://rxjs.dev/deprecations/subscribe-arguments */
subscribe(next?: ((value: T) => void) | null, error?: ((error: any) => void) | null, complete?: (() => void) | null): Subscription;
/**
* Used as a NON-CANCELLABLE means of subscribing to an observable, for use with
* APIs that expect promises, like `async/await`. You cannot unsubscribe from this.
*
* **WARNING**: Only use this with observables you *know* will complete. If the source
* observable does not complete, you will end up with a promise that is hung up, and
* potentially all of the state of an async function hanging out in memory. To avoid
* this situation, look into adding something like {@link timeout}, {@link take},
* {@link takeWhile}, or {@link takeUntil} amongst others.
*
* #### Example
*
* ```ts
* import { interval, take } from 'rxjs';
*
* const source$ = interval(1000).pipe(take(4));
*
* async function getTotal() {
* let total = 0;
*
* await source$.forEach(value => {
* total += value;
* console.log('observable -> ' + value);
* });
*
* return total;
* }
*
* getTotal().then(
* total => console.log('Total: ' + total)
* );
*
* // Expected:
* // 'observable -> 0'
* // 'observable -> 1'
* // 'observable -> 2'
* // 'observable -> 3'
* // 'Total: 6'
* ```
*
* @param next a handler for each value emitted by the observable
* @return a promise that either resolves on observable completion or
* rejects with the handled error
*/
forEach(next: (value: T) => void): Promise<void>;
/**
* @param next a handler for each value emitted by the observable
* @param promiseCtor a constructor function used to instantiate the Promise
* @return a promise that either resolves on observable completion or
* rejects with the handled error
* @deprecated Passing a Promise constructor will no longer be available
* in upcoming versions of RxJS. This is because it adds weight to the library, for very
* little benefit. If you need this functionality, it is recommended that you either
* polyfill Promise, or you create an adapter to convert the returned native promise
* to whatever promise implementation you wanted. Will be removed in v8.
*/
forEach(next: (value: T) => void, promiseCtor: PromiseConstructorLike): Promise<void>;
pipe(): Observable<T>;
pipe<A>(op1: OperatorFunction<T, A>): Observable<A>;
pipe<A, B>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>): Observable<B>;
pipe<A, B, C>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>): Observable<C>;
pipe<A, B, C, D>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>): Observable<D>;
pipe<A, B, C, D, E>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>): Observable<E>;
pipe<A, B, C, D, E, F>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>, op6: OperatorFunction<E, F>): Observable<F>;
pipe<A, B, C, D, E, F, G>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>, op6: OperatorFunction<E, F>, op7: OperatorFunction<F, G>): Observable<G>;
pipe<A, B, C, D, E, F, G, H>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>, op6: OperatorFunction<E, F>, op7: OperatorFunction<F, G>, op8: OperatorFunction<G, H>): Observable<H>;
pipe<A, B, C, D, E, F, G, H, I>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>, op6: OperatorFunction<E, F>, op7: OperatorFunction<F, G>, op8: OperatorFunction<G, H>, op9: OperatorFunction<H, I>): Observable<I>;
pipe<A, B, C, D, E, F, G, H, I>(op1: OperatorFunction<T, A>, op2: OperatorFunction<A, B>, op3: OperatorFunction<B, C>, op4: OperatorFunction<C, D>, op5: OperatorFunction<D, E>, op6: OperatorFunction<E, F>, op7: OperatorFunction<F, G>, op8: OperatorFunction<G, H>, op9: OperatorFunction<H, I>, ...operations: OperatorFunction<any, any>[]): Observable<unknown>;
/** @deprecated Replaced with {@link firstValueFrom} and {@link lastValueFrom}. Will be removed in v8. Details: https://rxjs.dev/deprecations/to-promise */
toPromise(): Promise<T | undefined>;
/** @deprecated Replaced with {@link firstValueFrom} and {@link lastValueFrom}. Will be removed in v8. Details: https://rxjs.dev/deprecations/to-promise */
toPromise(PromiseCtor: typeof Promise): Promise<T | undefined>;
/** @deprecated Replaced with {@link firstValueFrom} and {@link lastValueFrom}. Will be removed in v8. Details: https://rxjs.dev/deprecations/to-promise */
toPromise(PromiseCtor: PromiseConstructorLike): Promise<T | undefined>;
}
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