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 12, Friend Factory

  1. A non-member friend function has the same access to the members of the class as a member function.
  2. Granting friendship to a template makes every instantiation of this template a friend; this includes instantiations of the same template but with different, unrelated, types.
  3. Binary operators implemented as member functions are always called on the left-hand-side operand of the operator, with no conversions allowed for that object. Conversions are allowed for the right-hand-side operand, according to the type of the argument of the member operator. This creates an asymmetry between expressions such as x + 2 and 2 + x, where the latter cannot be handled by a member function since the type of 2 (int) does not have any.
  4. The first operand of the inserter is always the stream, not the object that is printed. Therefore, a member function would have to be on that stream, which is a part of the standard library; it cannot be extended by the user to...