Lecture #10 - Substitution Principle

Web Resources:

Office Hours: Instructor & TAs

Content:

1. Syllabus
   Describes topics to be covered, reading material for you to digest before coming to class, and due dates for the assigned projects.
2. Project #2
   
3. Project #2 Help, Help with Graph implementations
4. Class Layout demo
   
5. Using Inheritance
   Discusses several distinct design uses for inheritance.
6. The Command Pattern is an interesting application of inheritance:
   

   Simple Callbacks - Function Pointers
   Callbacks - Command Pattern
   Callbacks - Commands to either global and member functions
   

7. Virtual Function Pointer Table structure
   
8. hiding
   Illustrates errors caused by inappropriate overloading and use of default parameters.
9. importance of virtual destructors
   Demonstrates problems caused by omission of virtual destructors.
10. Vectors of Polymorphic Objects - Example Project
    Shows how to use heterogeneous objects in an STL container.
11. Liskov Substitution Principle
    This is a fundamental OOD principle, with some surprising subtleties when using C++ (see example project below).
12. Non-Virtual Interface Principle - a code example: see comments for explaination
    Liskov Substitutibility does not demand public virtual functions.
13. C++ Casts
    
14. Design Rules
    Design rules and idioms that transcend Object Oriented Design.