Your code won't compile. Here is code that compiles and result is as you desire: you can choose which version of connect
to call based on a pointer type:
class Base {
public:
virtual ~Base() {}
virtual Base& connect(Base &b) = 0;
};
class Derived: public Base {
public:
virtual ~Derived() {}
virtual Base& connect(Base &b)
{
qDebug() << "Baseconnect";
}
};
class AA: public Derived {
public:
AA() {}
virtual ~AA() {}
};
class BB: public Derived {
public:
BB() {}
virtual ~BB() {}
AA& connect(AA &a)
{
qDebug() << "Aconnect";
}
};
example:
int main(int argc, char *argv[])
{
AA* aaptr = new AA;
BB* bbptr = new BB;
bbptr->connect(*aaptr); // version from BB is called
Derived* dptr = new BB;
dptr->connect(*aaptr); // version from Derived is called
// ...
}
As a side note, please always ensure that your code compiles and question is well defined. You narrow down the chances for helpful answer to your question otherwise.