/// <reference types="node" />
declare class Deque<T> {
    static DequeEmptyError: {
        new (message?: string): {
            name: string;
            message: string;
            stack?: string | undefined;
        };
        captureStackTrace(targetObject: object, constructorOpt?: Function | undefined): void;
        prepareStackTrace?: ((err: Error, stackTraces: NodeJS.CallSite[]) => any) | undefined;
        stackTraceLimit: number;
    };
    private deque;
    private checkIsEmpty;
    /**
     * 从队头入队
     */
    pushFront(value: T): void;
    /**
     * 从队尾入队
     */
    pushBack(value: T): void;
    /**
     * 队头
     */
    getFront(): T;
    /**
     * 队尾
     */
    getBack(): T;
    /**
     * 从队头出队
     */
    popFront(): T | undefined;
    /**
     * 从队尾出队
     */
    popBack(): T;
    /**
     * 是否为空
     */
    isEmpty(): boolean;
    /**
     * 是否非空
     */
    isNotEmpty(): boolean;
    /**
     * 获取长度
     */
    getSize(): number;
    /**
     * 转换成数组
     */
    toArray(): T[];
    /**
     * 清空双端队列
     */
    clear(): void;
}
export default Deque;