Method operator=

tests/test_methods_and_attributes.cpp:36–39

    std::string toString() const { return "ExampleMandA[value=" + std::to_string(value) + "]"; }

    void operator=(const ExampleMandA &e) {
        print_copy_assigned(this);
        value = e.value;
    }
    void operator=(ExampleMandA &&e) noexcept {
        print_move_assigned(this);
        value = e.value;