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)
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Creating a coroutine task type for asynchronous computations

A major component of the C++20 standard is represented by coroutines. Simply put, coroutines are functions that can be suspended and resumed. Coroutines are an alternative to writing asynchronous code. They help simplify asynchronous I/O code, lazy computations, or event-driven applications. When a coroutine is suspended, the execution returns to the caller and the data necessary to resume the coroutine is stored separately from the stack. For this reason, the C++20 coroutines are called stackless. Unfortunately, the C++20 standard does not define actual coroutines types, but only a framework for building them. This makes writing asynchronous code with coroutines difficult without relying on third-party components.

In this recipe, you will learn how to write a coroutine task type that represents an asynchronous computation that starts executing when the task is awaited.

Getting ready

The several standard...