Book Image

Hands-On Design Patterns with C++ (Second Edition) - Second Edition

By : Fedor G. Pikus
5 (1)
Book Image

Hands-On Design Patterns with C++ (Second Edition) - Second Edition

5 (1)
By: Fedor G. Pikus

Overview of this book

C++ is a general-purpose programming language designed for efficiency, performance, and flexibility. Design patterns are commonly accepted solutions to well-recognized design problems. In essence, they are a library of reusable components, only for software architecture, and not for a concrete implementation. This book helps you focus on the design patterns that naturally adapt to your needs, and on the patterns that uniquely benefit from the features of C++. Armed with the knowledge of these patterns, you’ll spend less time searching for solutions to common problems and tackle challenges with the solutions developed from experience. You’ll also explore that design patterns are a concise and efficient way to communicate, as patterns are a familiar and recognizable solution to a specific problem and can convey a considerable amount of information with a single line of code. By the end of this book, you’ll have a deep understanding of how to use design patterns to write maintainable, robust, and reusable software.
Table of Contents (26 chapters)
1
Part 1: Getting Started with C++ Features and Concepts
5
Part 2: Common C++ Idioms
10
Part 3: C++ Design Patterns
18
Part 4: Advanced C++ Design Patterns

Chapter 16, Adapters and Decorators

  1. The 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.
  2. 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.
  3. In the classic OOP implementation, both the decorated class and the Decorator class inherit from a common base class. This has two limitations; the most important one is that the decorated object preserves the polymorphic behavior of the decorated class but cannot preserve the interface that is added in a concrete (derived) decorated class and was not present in the base class. The second limitation is that the Decorator is specific to a particular hierarchy. We can remove both limitations using the generic programming tools of C++.
  4. In general...