#include <https://raw.githubusercontent.com/martinmoene/optional-lite/master/include/nonstd/optional.hpp>
#include <iostream>
#include <string>

struct A
{
    A() = default;
    A(const A &) = delete;
    A& operator=(const A &) = delete;
    A(A &&) = delete;
    A& operator=(A &&) = delete;
};

int main()
{
    std::cout << "Copy constructible: "
        << std::is_copy_constructible<A>::value << " "
        << std::is_copy_constructible<nonstd::optional<A>>::value
        << std::endl;

    std::cout << "Move constructible: "
        << std::is_move_constructible<A>::value << " "
        << std::is_move_constructible<nonstd::optional<A>>::value
        << std::endl;

    std::cout << "Copy assignable: "
        << std::is_copy_assignable<A>::value << " "
        << std::is_copy_assignable<nonstd::optional<A>>::value
        << std::endl;

    std::cout << "Move assignable: "
        << std::is_move_assignable<A>::value << " "
        << std::is_move_assignable<nonstd::optional<A>>::value
        << std::endl;
}