ar::root(arp::validation::default_validator,
             ar::help(arp::long_name_t{"help"_S}, arp::short_name_t{"h"_S}),
             ar::mode(ar::flag(arp::long_name_t{"verbose"_S}, arp::short_name_t{"v"_S}),
                      ar::flag(arp::long_name_t{"value"_S}, arp::short_name_t{"v"_S}),
                      arp::router{[](bool verbose, bool value) {
                          std::cout << verbose << ", " << value << std::endl;
                      }}))
        .parse(argc, argv);