试试typedef函数指针相关的东西

using namespace std;
class {};
typedef void (Clz::*pot)();
class Sub : public Clz{
public:
    void test(){cout<<"test"<<endl;}
    pot pFun;
    void testCallback(){(this->*pFun)();}
};
int main() {
    
    Sub* sub = new Sub();
    sub->pFun = pot(&Sub::test);
    sub->testCallback();
    delete sub;
    return 0;
}