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 generator type for sequences of values

In the previous recipe, we saw how to create a coroutine task that enables asynchronous computations. We used the co_await operator to suspend execution until resumed and the co_return keyword to complete execution and return a value. However, another keyword, co_yield, also defines a function as a coroutine. It suspends the execution of the coroutine and returns a value. It enables a coroutine to return multiple values, one each time it is resumed. To support this feature, another type of coroutine is required. This type is called a generator. Conceptually, it's like a stream that produces a sequence of values of a type T in a lazy manner (when iterated). In this recipe, we will see how we can implement a simple generator.

Getting ready

The goal of this recipe is to create a generator coroutine type that enables us to write code like the following:

generator<int> iota(int start = 0, int step = 1) noexcept...