/**
 *
 * @category Structures
 */
export declare class PriorityQueue<T> {
    private comparator;
    private equals;
    private heap;
    constructor(comparator: (a: T, b: T) => boolean, equals?: (a: T, b: T) => boolean);
    size(): number;
    isEmpty(): boolean;
    peek(): T;
    has(other: T): boolean;
    replace(value: T): T;
    push(value: T): void;
    pop(): T | undefined;
    reorder(): void;
    toArray(): T[];
    private greater;
    private swap;
    private siftUp;
    private siftDown;
}