/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */
import { EventEmitter } from "events";
import { IEvent, TransformedEvent, IEventTransformer, IEventProvider } from "@fluidframework/common-definitions";
/**
 * The event emitter polyfill and the node event emitter have different event types:
 * string | symbol vs. string | number
 *
 * This type allow us to correctly handle either type
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 * @internal
 */
export declare type EventEmitterEventType = EventEmitter extends {
    on(event: infer E, listener: any): any;
} ? E : never;
/**
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 * @internal
 */
export declare type TypedEventTransform<TThis, TEvent> = TransformedEvent<TThis, "newListener" | "removeListener", Parameters<(event: string, listener: (...args: any[]) => void) => void>> & IEventTransformer<TThis, TEvent & IEvent> & TransformedEvent<TThis, EventEmitterEventType, any[]>;
/**
 * Event Emitter helper class the supports emitting typed events
 *
 * @deprecated Moved to the `@fluidframework-internal/client-utils` package.
 * @internal
 */
export declare class TypedEventEmitter<TEvent> extends EventEmitter implements IEventProvider<TEvent & IEvent> {
    constructor();
    readonly addListener: TypedEventTransform<this, TEvent>;
    readonly on: TypedEventTransform<this, TEvent>;
    readonly once: TypedEventTransform<this, TEvent>;
    readonly prependListener: TypedEventTransform<this, TEvent>;
    readonly prependOnceListener: TypedEventTransform<this, TEvent>;
    readonly removeListener: TypedEventTransform<this, TEvent>;
    readonly off: TypedEventTransform<this, TEvent>;
}
//# sourceMappingURL=typedEventEmitter.d.ts.map