This document discusses the evolution and key concepts of object-oriented programming (OOP). It describes how OOP languages implemented concepts like encapsulation, inheritance, and polymorphism differently. Early OOP languages introduced classes and objects, while some newer languages support interfaces and mixed inheritance. Implementing dynamic method binding and other OOP features requires tradeoffs between simplicity, performance, and functionality.

1. C H A P T E R S E V E N More Object-Oriented Programming

8. An Example in C++

9. An Example in C++

13. Yikes! Huge families of classes are used to implement language features. This is from Smalltalk-80.

17. Dynamic Method Binding

18. Dynamic Method Binding

19. Member Lookup

20. Virtual Methods

21. Inheritance

22. Multiple Inheritance

23. Multiple Inheritance

24. Multiple Inheritance The vtable entry contains the “this” correction for each method

25. Replicated Inheritance

26. Replicated Inheritance

27. Shared Multiple Inheritance “ A new opportunity for ambiguity and additional implementation complexity”

28. Shared Multiple Inheritance

29. Shared Multiple Inheritance

31. Mixed Inheritance

35. Next time… Functional Programming