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Modern C++ Programming Cookbook

Modern C++ Programming Cookbook - Third Edition

By : Marius Bancila
4.6 (21)
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Modern C++ Programming Cookbook

Modern C++ Programming Cookbook

4.6 (21)
By: Marius Bancila

Overview of this book

The updated third edition of Modern C++ Programming Cookbook addresses the latest features of C++23, such as the stacktrace library, std::expected and std::mdspan classes, the header, formatting library improvements, and updates to the ranges library. It also gets into more C++20 topics not previously covered, such as sync streams and source_location. The book is organized into practical recipes covering a wide range of real-world problems, helping you find the solutions you need quickly. You’ll find coverage of all the core concepts of modern C++ programming and features and techniques from C++11 through to C++23, meaning you’ll stay ahead of the curve by learning to incorporate the newest language and library improvements. Beyond the core concepts and new features, you’ll explore recipes related to performance and best practices, how to implement useful patterns and idioms, like pimpl, named parameter, attorney-client, and the factory pattern, and how to complete unit testing with the widely used C++ libraries: Boost.Test, Google Test, and Catch2. With the comprehensive coverage this C++ programming guide offers, by the end of the book you’ll have everything you need to build performant, scalable, and efficient applications in C++.
Table of Contents (15 chapters)
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13
Other Books You May Enjoy
14
Index

Visiting a std::variant

std::variant is a new standard container that was added to C++17 based on the boost.variant library. A variant is a type-safe union that holds the value of one of its alternative types. Although, in the previous recipe, we have seen various operations with variants, the variants we used were rather simple, with POD types mostly, which is not the actual purpose for which std::variant was created. Variants are intended to be used for holding alternatives of similar non-polymorphic and non-POD types. In this recipe, we will see a more real-world example of using variants and will learn how to visit variants.

Getting ready

For this recipe, you should be familiar with the std::variant type. It is recommended that you first read the previous recipe, Using std::variant as a type-safe union.

To explain how variant visitation can be done, we will consider a variant for representing a media DVD. Let’s suppose we want to model a store or library that...

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Modern C++ Programming Cookbook
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