Question

I am working on a project that had been thought out, rather poorly. I have subclasses that access each other’s member functions. Here’s the situation:

class A {
public:
    class B;
    class C;
};

class A::B {
public:
    void f() {
        C:g();
    }
}
class A::C {
public:
    void g() {
        B:f();
    }
}

This code, obviously, runs into various errors which is too much list here. My question is, what is the solution to such a situation? Is it inheritance? If so, how? Is there any other way for me to preserve the “interplaying”-nature of classes B and C.

Answer 1

If you mean C:g() –> C::g(), B:f() –> B::f()

You can not call member function without object unless these member functions are static.
Probably a pointer to each other may resolve your issue?
I introduce pointer is because otherwise I need to write something to help with circular include issue. 🙂

#include <memory>

class A::B {
public:
    void f() {
        c_->g();
    }
  std::unique_ptr<C> c_;
}
class A::C {
public:
    void g() {
        b_->f();
    }
  std::unique_ptr<B> b_;
}