Re: Question about interfaces

When creating interfaces and implementations, the usual thing is doing
somethign like

class Interface {
public:
  virtual void f() = 0;
  virtual void g() = 0;
};

class Imp1 : public Interface {
public:
  void f();
  void g();
};

So we can have Interface* if = new Imp1; and so on..

But we could also use private inheritance:

class Imp1 {
protected:
  void f();
  void g();
};

class Interface : private Imp1 {
public:
  void f() { Imp1::f(); }
  ...
};

What are the advantages/disadvantages of each?

Any advise?