Method clear

lib_acl_cpp/include/acl_cpp.cn/stdlib/tbox.hpp:58–67

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	 * @param free_obj {bool} �ͷŵ��� delete ����ɾ����Ϣ����
	 */
	void clear(bool free_obj = false) {
		if (free_obj) {
			for (typename std::list<T*>::iterator it =
				tbox_.begin(); it != tbox_.end(); ++it) {

				delete *it;
			}
		}
		tbox_.clear();
	}

	/**
	 * ������Ϣ����