C++ const method on non const pointer member

Question

I was wondering how protect a non const pointer member from an object throught a const method. For example:

class B{
    public:
        B(){
            thi         


        

Answer 1

Something like this, perhaps:

template 
class deep_const_ptr {
  T* p_;
public:
  deep_const_ptr(T* p) : p_(p);

  T* operator->() { return p_;}
  const T* operator->() const { return p_;}
};

class A {
  deep_const_ptr b = new B;
};

deep_const_ptr behaves like a const T* const pointer in A's const methods, and like T* in non-const methods. Fleshing the class out further is left as an exercise for the reader.