gistfile1.cpp

auto&& hello = command<int, std::string>{{
    option{"--count", 1, "number of greetings"},
    option{"--name", "", "the person to greet", flags::required}},
    [](int count, std::string name) {
        for (auto i : range(0, count))
            std::cout << "Hello " << name << '\n';
    }};

int main(int argc, char* argv[]) {
    return hello(argc, argv);
}