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import { ObservableInput } from '../Observable';
import { Operator } from '../Operator';
import { Subscriber } from '../Subscriber';
import { Subscription } from '../Subscription';
import { OuterSubscriber } from '../OuterSubscriber';
import { InnerSubscriber } from '../InnerSubscriber';
import { OperatorFunction } from '../interfaces';
export declare function mergeMap<T, R>(project: (value: T, index: number) => ObservableInput<R>, concurrent?: number): OperatorFunction<T, R>;
export declare function mergeMap<T, I, R>(project: (value: T, index: number) => ObservableInput<I>, resultSelector: (outerValue: T, innerValue: I, outerIndex: number, innerIndex: number) => R, concurrent?: number): OperatorFunction<T, R>;
export declare class MergeMapOperator<T, I, R> implements Operator<T, I> {
private project;
private resultSelector;
private concurrent;
constructor(project: (value: T, index: number) => ObservableInput<I>, resultSelector?: (outerValue: T, innerValue: I, outerIndex: number, innerIndex: number) => R, concurrent?: number);
call(observer: Subscriber<I>, source: any): any;
}
/**
* We need this JSDoc comment for affecting ESDoc.
* @ignore
* @extends {Ignored}
*/
export declare class MergeMapSubscriber<T, I, R> extends OuterSubscriber<T, I> {
private project;
private resultSelector;
private concurrent;
private hasCompleted;
private buffer;
private active;
protected index: number;
constructor(destination: Subscriber<I>, project: (value: T, index: number) => ObservableInput<I>, resultSelector?: (outerValue: T, innerValue: I, outerIndex: number, innerIndex: number) => R, concurrent?: number);
protected _next(value: T): void;
protected _tryNext(value: T): void;
private _innerSub(ish, value, index);
protected _complete(): void;
notifyNext(outerValue: T, innerValue: I, outerIndex: number, innerIndex: number, innerSub: InnerSubscriber<T, I>): void;
private _notifyResultSelector(outerValue, innerValue, outerIndex, innerIndex);
notifyComplete(innerSub: Subscription): void;
}