Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
13
Bibliography
14
Other Books You May Enjoy
15
Index

Providing metadata to the compiler with attributes

C++ has been very deficient when it comes to features that enable reflection or introspection on types or data or standard mechanisms to define language extensions. Because of that, compilers have defined their own specific extensions for this purpose. Examples include the VC++ __declspec() specifier or the GCC __attribute__((...)). C++11, however, introduces the concept of attributes, which enable compilers to implement extensions in a standard way or even embedded domain-specific languages. The new C++ standards define several attributes all compilers should implement, and that will be the topic of this recipe.

How to do it...

Use standard attributes to provide hints for the compiler about various design goals such as in the scenarios listed here, but not only these:

  • To ensure that the return value from a function cannot be ignored, declare the function with the [[nodiscard]] attribute. In C++20, you can specify...