struct functor {
    std::bound_function<sig>* p;
    functor(functor*& p) {
        p = this;
    }
    operator() {
        delete p;
    }
};
int main() {
    functor* p;
    std::bound_function<sig>* t = new std::bound_function<sig>(functor(p));
    p->p = t;
    (*t)();
}