MoTTs_

    class C {
        handleEvent() {}

        someMethod() {
            onEvent(this.handleEvent); // bad; "this" lost
            onEvent(this.handleEvent.bind(this); // ok
        }
    }

    class C {
        public:
            void handle_event() {}

            void some_method() {
                on_event(&C::handle_event); // bad; error
                on_event(std::bind(&C::handle_event, this)); // ok
            }
    };