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

Using bitset for fixed-size sequences of bits

It is not uncommon for developers to operate with bit flags. This can be either because they work with operating system APIs (usually written in C) that take various types of arguments (such as options or styles) in the form of bit flags, or because they work with libraries that do similar things, or simply because some types of problems are naturally solved with bit flags. We can think of alternatives to working with bits and bit operations, such as defining arrays that have one element for every option/flag, or defining a structure with members and functions to model the bit flags, but these are often more complicated; and in the case where you need to pass a numerical value representing bit flags to a function, you still need to convert the array or the structure to a sequence of bits. For this reason, the C++ standard provides a container called std::bitset for fixed-size sequences of bits.

Getting ready

For this recipe, you...