Re: Derived::Derived(const Base&)

Hi folks,

Can anybody shed some light on this problem?

class Interface {
public:
  Interface() { ...}
  virtual ~Interface() { ...}
  virtual method() = 0;
};

class Impl1: public Interface {
public:
  Impl1() { ...}
  Impl1(const Interface&); // problem 1
  virtual ~Impl1() { ... }
  Impl1& operator=(const Interface&); // problem 2
};

The problem is that the compiler insists on generating the following
methods:
  Impl1(const Impl1&); // copy constructor
  Impl1& operator=(const Impl1&); // assignment operator
for me.
I do not need these methods.
I do not want these methods.
I would have thought the compiler would call one of my explicit
methods since every Impl1 is also an Interface.

Is there some simple trick I am missing here?