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 6, Understanding Type Erasure

  1. Type erasure is a programming technique where the program, as written, does not show an explicit dependence on some of the types it uses. It is a powerful design tool when used for separating abstract behavior from a particular implementation.
  2. The implementation involves either a polymorphic object and a virtual function call, or a function that is implemented specifically for the erased type and is invoked through a function pointer. Usually, this is combined with generic programming to construct such polymorphic objects or generate functions from a template automatically and ensure that the reified type is always the same as the one provided during construction.
  3. A program may be written in a way that avoids explicit mention of most types. The types are deduced by template functions and declared as auto or as template-deduced typedef types. However, the actual types of objects that are hidden by auto still depend on all types the...