Hands-On Design Patterns with C++

Chapter 17

• What is the Adapter pattern?

Adapter is a very general pattern that modifies an interface of a class or a function (or a template, in C++) so it can be used in a context that requires a different interface but similar underlying behavior.

• What is the Decorator pattern and how does it differ from the Adapter pattern?

The Decorator pattern is a more narrow pattern; it modifies the existing interface by adding or removing behavior, but does not convert an interface into a completely different one.

• The classic OOP implementation of the Decorator pattern is usually not recommended in C++. Why not?

In the classic OOP implementation, both the decorated class and the Decorator class inherit from a common base class. This has two ...