import { Observable, ObservableInput } from '../Observable';
import { Operator } from '../Operator';
import { Subscriber } from '../Subscriber';
import { OuterSubscriber } from '../OuterSubscriber';
import { InnerSubscriber } from '../InnerSubscriber';
/**
 * Combines multiple Observables to create an Observable whose values are
 * calculated from the latest values of each of its input Observables.
 *
 * <span class="informal">Whenever any input Observable emits a value, it
 * computes a formula using the latest values from all the inputs, then emits
 * the output of that formula.</span>
 *
 * <img src="./img/combineLatest.png" width="100%">
 *
 * `combineLatest` combines the values from this Observable with values from
 * Observables passed as arguments. This is done by subscribing to each
 * Observable, in order, and collecting an array of each of the most recent
 * values any time any of the input Observables emits, then either taking that
 * array and passing it as arguments to an optional `project` function and
 * emitting the return value of that, or just emitting the array of recent
 * values directly if there is no `project` function.
 *
 * @example <caption>Dynamically calculate the Body-Mass Index from an Observable of weight and one for height</caption>
 * var weight = Rx.Observable.of(70, 72, 76, 79, 75);
 * var height = Rx.Observable.of(1.76, 1.77, 1.78);
 * var bmi = weight.combineLatest(height, (w, h) => w / (h * h));
 * bmi.subscribe(x => console.log('BMI is ' + x));
 *
 * @see {@link combineAll}
 * @see {@link merge}
 * @see {@link withLatestFrom}
 *
 * @param {Observable} other An input Observable to combine with the source
 * Observable. More than one input Observables may be given as argument.
 * @param {function} [project] An optional function to project the values from
 * the combined latest values into a new value on the output Observable.
 * @return {Observable} An Observable of projected values from the most recent
 * values from each input Observable, or an array of the most recent values from
 * each input Observable.
 * @method combineLatest
 * @owner Observable
 */
export declare function combineLatest<T, R>(...observables: Array<ObservableInput<any> | Array<ObservableInput<any>> | ((...values: Array<any>) => R)>): Observable<R>;
export interface CombineLatestSignature<T> {
    <R>(project: (v1: T) => R): Observable<R>;
    <T2, R>(v2: ObservableInput<T2>, project: (v1: T, v2: T2) => R): Observable<R>;
    <T2, T3, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, project: (v1: T, v2: T2, v3: T3) => R): Observable<R>;
    <T2, T3, T4, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, project: (v1: T, v2: T2, v3: T3, v4: T4) => R): Observable<R>;
    <T2, T3, T4, T5, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5) => R): Observable<R>;
    <T2, T3, T4, T5, T6, R>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>, project: (v1: T, v2: T2, v3: T3, v4: T4, v5: T5, v6: T6) => R): Observable<R>;
    <T2>(v2: ObservableInput<T2>): Observable<[T, T2]>;
    <T2, T3>(v2: ObservableInput<T2>, v3: ObservableInput<T3>): Observable<[T, T2, T3]>;
    <T2, T3, T4>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>): Observable<[T, T2, T3, T4]>;
    <T2, T3, T4, T5>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>): Observable<[T, T2, T3, T4, T5]>;
    <T2, T3, T4, T5, T6>(v2: ObservableInput<T2>, v3: ObservableInput<T3>, v4: ObservableInput<T4>, v5: ObservableInput<T5>, v6: ObservableInput<T6>): Observable<[T, T2, T3, T4, T5, T6]>;
    <R>(...observables: Array<ObservableInput<T> | ((...values: Array<T>) => R)>): Observable<R>;
    <R>(array: ObservableInput<T>[]): Observable<Array<T>>;
    <TOther, R>(array: ObservableInput<TOther>[], project: (v1: T, ...values: Array<TOther>) => R): Observable<R>;
}
export declare class CombineLatestOperator<T, R> implements Operator<T, R> {
    private project;
    constructor(project?: (...values: Array<any>) => R);
    call(subscriber: Subscriber<R>, source: any): any;
}
/**
 * We need this JSDoc comment for affecting ESDoc.
 * @ignore
 * @extends {Ignored}
 */
export declare class CombineLatestSubscriber<T, R> extends OuterSubscriber<T, R> {
    private project;
    private active;
    private values;
    private observables;
    private toRespond;
    constructor(destination: Subscriber<R>, project?: (...values: Array<any>) => R);
    protected _next(observable: any): void;
    protected _complete(): void;
    notifyComplete(unused: Subscriber<R>): void;
    notifyNext(outerValue: T, innerValue: R, outerIndex: number, innerIndex: number, innerSub: InnerSubscriber<T, R>): void;
    private _tryProject(values);
}