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

Factory-like patterns in C++

There are many variations of the basic Factory patterns used in C++ to address specific design needs and constraints. In this section, we will consider several of them. This is by no means an exclusive list of factory-like patterns in C++, but understanding these variants should prepare the reader for combining the techniques that they have learned from this book to address various design challenges related to object factories.

Polymorphic copy

So far, we have considered factory alternatives to the object constructor—either the default constructor or one of the constructors with arguments. However, a similar pattern can be applied to the copy constructor—we have an object, and we want to make a copy.

This is a similar problem in many ways—we have an object that’s accessed through the base class pointer, and we want to call its copy constructor. For the reasons we discussed earlier, not the least of which is that the...