     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl;     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl;     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl;     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl;     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl;     std::cout << cs0 << ":" << (cs0 == cs0) << std::endl