Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
Book Image

Modern C++ Programming Cookbook - Second Edition

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

Specifying requirements on template arguments with concepts

Template metaprogramming is an important part of the C++ language, empowering the development of general-purpose libraries, including the standard library. However, template metaprogramming is not trivial. On the contrary, complex tasks could be tedious and difficult to get right without a lot of experience. In fact, the C++ Core Guidelines, an initiative created by Bjarne Stroustrup and Herb Sutter, have a rule called Use template metaprogramming only when you really need to, which reasons that:

Template metaprogramming is hard to get right, slows down compilation, and is often very hard to maintain.

An important aspect concerning template metaprogramming has been the specification of constraints for type template parameters in order to impose restrictions on the types a template can be instantiated with. The C++20 concepts library is designed to solve this problem. A concept is a named set of constraints and...