How to generate a compiler warning/error when object sliced

Question

I want to know if it is possible to let compiler issue a warning/error for code as following:

Note:

1. Yea, it is bad programming style and

Answer 1

If you can modify the base class you could do something like:

class Base
{
public:
// not implemented will cause a link error
    Base(const Derived &d);
    const Base &operator=(const Derived &rhs);
};

Depending on your compiler that should get you the translation unit, and maybe the function where the slicing is happening.