Valid C ++ Clause 6 and valid Clause 6

Valid C ++ Clause 6 and valid Clause 6
If you do not want to use a function automatically generated by the compiler, you should explicitly reject it.

The knowledge point in this section is
If you do not want the compiler to automatically generate the copy function and the copy assignment function. We can implement the following two methods:

First:
Declare the copy and copy assignment functions as private members without implementing them. In this way, the compiler cannot compile such a function. If other member functions call them, the connector cannot be connected.
The following code:

Class HomeForSale {public :...... Private: HomeForSale (const HomeForSale &); HomeForSale & operator = (const HomeForSale &);};

Second:
You can define a base class and declare it as a private member through the copy function and copy assignment function of the base class. In this way, when the derived class calls the copy function and copy assignment function, it cannot be compiled.
The following code:

Class Uncopyable {protected: Uncopyable (){}~ Uncopyable () {}; private: Uncopyable (const Uncopyable &); Uncopyable & operator = (const Uncopyable &) ;}; class HomeForSale: public Uncopyable {......};