/** 单例模式
 * 确保一个类只有一个实例，并提供一个全局访问点
 * @param constructor
 * @constructor
 */
export function Singleton<T extends { new (...args: any[]): any }>(constructor: T): T {
  let instance: any;

  return new Proxy(constructor, {
    construct(target, argsList, newTarget) {
      if (!instance) {
        instance = Reflect.construct(target, argsList, newTarget);
      }
      return instance;
    },
  });
}