Function operator==

example/quick_examples.cpp:195–197

    };

    inline bool operator==(const my_eq_ne_structure& x, const my_eq_ne_structure& y) {
        return boost::pfr::eq_fields(x, y);
    }

    inline bool operator!=(const my_eq_ne_structure& x, const my_eq_ne_structure& y) {
        return boost::pfr::ne_fields(x, y);