/**
 * Copyright (c) 2017-present, RobotlegsJS. All Rights Reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
import { ISignal } from "./ISignal";
import { ISlot } from "./ISlot";
import { OnceSignal } from "./OnceSignal";
/**
 * Allows the valueClasses to be set in MXML, e.g.
 * <signals:Signal id="nameChanged">{[String, uint]}</signals:Signal>
 */
/**
 * Signal dispatches events to multiple listeners.
 * It is inspired by C# events and delegates, and by
 * <a target="_top" href="http://en.wikipedia.org/wiki/Signals_and_slots">signals and slots</a>
 * in Qt.
 * A Signal adds event dispatching functionality through composition and interfaces,
 * rather than inheriting from a dispatcher.
 * <br/><br/>
 * Project home: <a target="_top" href="http://github.com/robertpenner/as3-signals/">http://github.com/robertpenner/as3-signals/</a>
 */
export declare class Signal extends OnceSignal implements ISignal {
    /**
     * @inheritDoc
     * @throws flash.errors.IllegalOperationError <code>IllegalOperationError</code>: You cannot addOnce() then add() the same listener without removing the relationship first.
     * @throws ArgumentError <code>ArgumentError</code>: Given listener is <code>null</code>.
     */
    add(listener: Function): ISlot;
}