1. Rule of Five

2. Rule of 3 If you manage memory you need: Custom Destructor
Custom Copy Constructor
Custom Assignment Operator

3. Rule of 5 If you manage memory you need: You may want to provide:
Custom Destructor
Custom Copy Constructor
Custom Assignment Operator
You may want to provide:
Move assignment operator
Move copy constructor

4. Move semantics
C++ allows us to specify that data should be moved from one place to another:

5. Moving
Copy:

6. Moving
Copy:

7. Moving
Copy:

8. Moving
Move:

9. Moving
Move:

10. Moving
Move:

11. Defining && = Rvalue reference
Move constructor/assignment take rvalue reference:
Move constructor:

12. Defining && = Rvalue reference
Move constructor/assignment take rvalue reference:
Move assignment:

13. Rule of 5 Why? But… Move can be more efficient than copying
Never required for program correctness, just efficiency