Rule Definition
If you need an assignment operator, you also need a destructor and copy constructor. If you need an assignment operator, it's because you need something like a deep copy, or some other management of resources. Thus it is almost certain that you will need a destructor and a copy constructor. If you don't need an assignment operator (because the default-generated assignment operator would be correct), you should let the compiler generate it: tt will not contain bugs, and you will often not have to update it when the class is modified.

Remediation
Prevent default generation of the destructor and copy constructor: - Provide your own version - Or declare it private without implementing it to prevent the operation (for copy constructor)

"C++ Notes: OOP: Copy Constructors":http://www.fredosaurus.com/notes-cpp/oop-condestructors/copyconstructors.html