Modern C++ Programming Cookbook E-Book

Marius Bancila

• Herausgeber: Packt Publishing
• Kategorie: Fachliteratur
• Sprache: Englisch

Seitenzahl: 1173

Veröffentlichungsjahr: 2024

Beschreibung

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++.

Leseprobe

Modern C++ Programming Cookbook

Third Edition

Master modern C++ including the latest features of C++23 with 140+ practical recipes

Marius Bancila

BIRMINGHAM—MUMBAI

Modern C++ Programming Cookbook

Third Edition

Copyright © 2024 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing or its dealers and distributors, will be held liable for any damages caused or alleged to have been caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

Senior Publishing Product Manager: Denim Pinto

Acquisition Editor – Peer Reviews: Swaroop Singh

Project Editor: Yamini Bhandari

Senior Development Editor: Elliot Dallow

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Technical Editor: Aneri Patel

Proofreader: Safis Editing

Indexer: Hemangini Bari

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Developer Relations Marketing Executive: Vipanshu Parashar

First published: May 2017

Second edition: September 2020

Third edition: February 2024

Production reference: 1260224

Published by Packt Publishing Ltd.

Grosvenor House

11 St Paul’s Square

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B3 1RB, UK.

ISBN 978-1-83508-054-2

www.packt.com

Contributors

About the author

Marius Bancila is a software engineer with two decades of experience in developing solutions for line of business applications and more. He is the author of Template Metaprogramming with C++ and The Modern C++ Challenge. He works as a software architect and is focused on Microsoft technologies, mainly developing desktop applications with C++ and C#. He is passionate about sharing his technical expertise with others and, for that reason, he has been recognized as a Microsoft MVP for C++ and later developer technologies since 2006. Marius lives in Romania and is active in various online communities.

I would like to thank Denim Pinto, Yamini Bhandari, Elliot Dallow, and all the other people from Packt that have worked on the book for their constant effort, as well as the reviewers, whose feedback only made the book better.

About the reviewers

Deák Ferenc got into the world of software development back when programming involved deciphering archaic mnemonics from the pages of magazines and manually typing them into a HC-91 computer. Since then he has become a security and safety-focused software developer, and now has over 20 years of experience in that field. He specializes in low-level system programming, optimization, and application safety analysis. He is well-versed in C and C++, with additional expertise in languages like Go, Java, Python, and others. When not working, he enjoys cooking traditional dishes from Transylvania.

I want to express my gratitude to Packt and the author for including me in this exciting journey and giving me the opportunity to review this book.

Alex Snape has always had a passion for technology, this led him into a career in software development spanning nearly three decades. During his career, Alex has worked across a number of sectors, from video games to financial systems and many things between. He is now working as a software architect in UK public infrastructure.

I would like to thank my parents, my wonderful wife Zoe, and my two adorable children, Aurelia and Marilla.

Learn more on Discord

Join our community’s Discord space for discussions with the author and other readers:

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Contents

Preface

Who this book is for

What this book covers

What’s new in this edition

To get the most out of this book

Get in touch

Learning Modern Core Language Features

Using auto whenever possible

How to do it...

How it works...

See also

Creating type aliases and alias templates

How to do it...

How it works...

See also

Understanding uniform initialization

Getting ready

How to do it...

How it works...

There’s more...

See also

Understanding the various forms of non-static member initialization

How to do it...

How it works...

See also

Controlling and querying object alignment

Getting ready

How to do it...

How it works...

See also

Using scoped enumerations

How to do it...

How it works...

See also

Using override and final for virtual methods

Getting ready

How to do it...

How it works...

See also

Using range-based for loops to iterate on a range

Getting ready

How to do it...

How it works...

See also

Enabling range-based for loops for custom types

Getting ready

How to do it...

How it works...

See also

Using explicit constructors and conversion operators to avoid implicit conversion

Getting ready

How to do it...

How it works...

See also

Using unnamed namespaces instead of static globals

Getting ready

How to do it...

How it works...

See also

Using inline namespaces for symbol versioning

Getting ready

How to do it...

How it works...

See also

Using structured bindings to handle multi-return values

Getting ready

How to do it...

How it works...

There’s more...

See also

Simplifying code with class template argument deduction

How to do it...

How it works...

See also

Using the subscript operator to access elements in a collection

How to do it…

How it works…

See also

Working with Numbers and Strings

Understanding the various numeric types

How to do it…

How it works…

See also

Limits and other properties of numeric types

Getting ready

How to do it...

How it works...

See also

Converting between numeric and string types

Getting ready

How to do it...

How it works...

See also

Understanding the various character and string types

How to do it…

How it works…

See also

Printing Unicode characters to the output console

How to do it…

How it works…

See also

Generating pseudo-random numbers

Getting ready

How to do it...

How it works...

See also

Properly initializing a pseudo-random number generator

Getting ready

How to do it...

How it works...

See also

Creating cooked user-defined literals

Getting ready

How to do it...

How it works...

There’s more...

See also

Creating raw user-defined literals

Getting ready

How to do it...

How it works...

See also

Using raw string literals to avoid escaping characters

Getting ready

How to do it...

How it works...

See also

Creating a library of string helpers

Getting ready

How to do it...

How it works...

There’s more…

See also

Verifying the format of a string using regular expressions

Getting ready

How to do it...

How it works...

There’s more...

See also

Parsing the content of a string using regular expressions

Getting ready

How to do it...

How it works...

See also

Replacing the content of a string using regular expressions

Getting ready

How to do it...

How it works...

See also

Using std::string_view instead of constant string references

Getting ready

How to do it...

How it works...

See also

Formatting and printing text with std::format and std::print

Getting ready

How to do it...

How it works...

See also

Using std::format with user-defined types

Getting ready

How to do it...

How it works...

There’s more…

See also

Exploring Functions

Defaulted and deleted functions

Getting started

How to do it...

How it works...

See also

Using lambdas with standard algorithms

Getting ready

How to do it...

How it works...

See also

Using generic and template lambdas

Getting started

How to do it...

How it works...

See also

Writing a recursive lambda

Getting ready

How to do it...

How it works...

See also

Writing function templates

How to do it…

How it works…

See also

Writing a function template with a variable number of arguments

Getting ready

How to do it...

How it works...

See also

Using fold expressions to simplify variadic function templates

Getting ready

How to do it...

How it works...

There’s more...

See also

Implementing the higher-order functions map and fold

Getting ready

How to do it...

How it works...

There’s more...

See also

Composing functions into a higher-order function

Getting ready

How to do it...

How it works...

There’s more...

See also

Uniformly invoking anything callable

Getting ready

How to do it...

How it works...

See also

Preprocessing and Compilation

Conditionally compiling your source code

Getting ready

How to do it...

How it works...

There’s more…

See also

Using the indirection pattern for preprocessor stringification and concatenation

Getting ready

How to do it...

How it works...

See also

Performing compile-time assertion checks with static_assert

Getting ready

How to do it...

How it works...

See also

Conditionally compiling classes and functions with enable_if

Getting ready

How to do it...

How it works...

There’s more...

See also

Selecting branches at compile time with constexpr if

Getting ready

How to do it...

How it works...

See also

Providing metadata to the compiler with attributes

How to do it...

How it works...

See also

Standard Library Containers, Algorithms, and Iterators

Using vector as a default container

Getting ready

How to do it...

How it works...

See also

Using bitset for fixed-size sequences of bits

Getting ready

How to do it...

How it works...

There’s more...

See also

Using vector<bool> for variable-size sequences of bits

Getting ready...

How to do it...

How it works...

There’s more...

See also

Using the bit manipulation utilities

Getting ready

How to do it…

How it works…

See also

Finding elements in a range

Getting ready

How to do it...

How it works...

See also

Sorting a range

Getting ready

How to do it...

How it works...

See also

Initializing a range

Getting ready

How to do it...

How it works...

There’s more…

See also

Using set operations on a range

Getting ready

How to do it...

How it works...

See also

Using iterators to insert new elements into a container

Getting ready

How to do it...

How it works...

There’s more...

See also

Writing your own random-access iterator

Getting ready

How to do it...

How it works...

There’s more...

See also

Container access with non-member functions

Getting ready

How to do it...

How it works...

There’s more...

See also

Selecting the right standard containers

How to do it…

How it works…

See also

General-Purpose Utilities

Expressing time intervals with chrono::duration

Getting ready

How to do it...

How it works...

There’s more...

See also

Working with calendars

Getting ready

How to do it…

How it works…

There’s more…

See also

Converting times between time zones

Getting ready

How to do it…

How it works…

See also

Measuring function execution time with a standard clock

Getting ready

How to do it...

How it works...

See also

Generating hash values for custom types

Getting ready

How to do it...

How it works...

See also

Using std::any to store any value

Getting ready

How to do it...

How it works...

See also

Using std::optional to store optional values

Getting ready

How to do it...

How it works...

There’s more…

See also

Chaining together computations that may or may not produce a value

Getting ready

How to do it…

How it works…

There’s more…

See also

Using std::variant as a type-safe union

Getting ready

How to do it...

How it works...

There’s more...

See also

Visiting a std::variant

Getting ready

How to do it...

How it works...

See also

Using std::expected to return a value or an error

Getting ready

How to do it…

How it works…

See also

Using std::span for contiguous sequences of objects

Getting ready

How to do it…

How it works…

See also

Using std::mdspan for multi-dimensional views of sequences of objects

Getting ready

How to do it…

How it works…

There’s more…

See also

Registering a function to be called when a program exits normally

Getting ready

How to do it...

How it works...

See also

Using type traits to query properties of types

Getting ready

How to do it...

How it works...

There’s more...

See also

Writing your own type traits

Getting ready

How to do it...

How it works...

See also

Using std::conditional to choose between types

Getting ready

How to do it...

How it works...

See also

Providing logging details with source_location

How to do it…

How it works…

See also

Using the stacktrace library to print the call sequence

How to do it…

How it works…

See also

Working with Files and Streams

Reading and writing raw data from/to binary files

Getting ready

How to do it...

How it works...

There’s more...

See also

Reading and writing objects from/to binary files

Getting ready

How to do it...

How it works...

See also

Using streams on fixed-size external buffers

How to do it…

How it works…

See also

Using localized settings for streams

Getting ready

How to do it...

How it works...

See also

Using I/O manipulators to control the output of a stream

Getting ready

How to do it...

How it works...

See also

Using monetary I/O manipulators

Getting ready

How to do it...

How it works...

See also

Using time I/O manipulators

Getting ready

How to do it...

How it works...

See also

Working with filesystem paths

Getting ready

How to do it...

How it works...

See also

Creating, copying, and deleting files and directories

Getting ready

How to do it...

How it works...

See also

Removing content from a file

Getting ready

How to do it...

How it works...

See also

Checking the properties of an existing file or directory

Getting ready

How to do it...

How it works...

See also

Enumerating the content of a directory

Getting ready

How to do it...

How it works...

There’s more...

See also

Finding a file

Getting ready

How to do it...

How it works...

See also

Leveraging Threading and Concurrency

Working with threads

Getting ready

How to do it...

How it works...

See also

Synchronizing access to shared data with mutexes and locks

Getting ready

How to do it...

How it works...

See also

Finding alternatives for recursive mutexes

Getting ready

How to do it...

How it works...

See also

Handling exceptions from thread functions

Getting ready

How to do it...

How it works...

See also

Sending notifications between threads

Getting ready

How to do it...

How it works...

See also

Using promises and futures to return values from threads

Getting ready

How to do it...

How it works...

There’s more...

See also

Executing functions asynchronously

Getting ready

How to do it...

How it works...

See also

Using atomic types

Getting ready

How to do it...

How it works...

See also

Implementing parallel map and fold with threads

Getting ready

How to do it...

How it works...

See also

Implementing parallel map and fold with tasks

Getting ready

How to do it...

How it works...

There’s more...

See also

Implementing parallel map and fold with standard parallel algorithms

Getting ready

How to do it...

How it works...

There’s more...

See also

Using joinable threads and cancellation mechanisms

Getting ready

How to do it...

How it works...

See also

Synchronizing threads with latches, barriers, and semaphores

Getting ready

How to do it...

How it works...

See also

Synchronizing writing to output streams from multiple threads

How to do it…

How it works…

See also

Robustness and Performance

Using exceptions for error handling

Getting ready

How to do it...

How it works...

There’s more...

See also

Using noexcept for functions that do not throw exceptions

How to do it...

How it works...

There’s more...

See also

Ensuring constant correctness for a program

How to do it...

How it works...

There’s more...

See also

Creating compile-time constant expressions

Getting ready

How to do it...

How it works...

There’s more…

See also

Creating immediate functions

How to do it…

How it works…

See also

Optimizing code in constant-evaluated contexts

How to do it…

How it works…

See also

Using virtual function calls in constant expressions

Getting ready

How to do it…

How it works…

See also

Performing correct type casts

How to do it...

How it works...

There’s more...

See also

Implementing move semantics

Getting ready

How to do it...

How it works...

There’s more...

See also

Using unique_ptr to uniquely own a memory resource

Getting ready

How to do it...

How it works...

See also

Using shared_ptr to share a memory resource

Getting ready

How to do it...

How it works...

See also

Consistent comparison with the operator <=>

Getting ready

How to do it…

How it works…

See also

Comparing signed and unsigned integers safely

How to do it…

How it works…

See also

Implementing Patterns and Idioms

Avoiding repetitive if-else statements in factory patterns

Getting ready

How to do it...

How it works...

There’s more...

See also

Implementing the pimpl idiom

Getting ready

How to do it...

How it works...

There’s more...

See also

Implementing the named parameter idiom

Getting ready

How to do it...

How it works...

See also

Separating interfaces and implementations with the non-virtual interface idiom

Getting ready

How to do it...

How it works...

See also

Handling friendship with the attorney-client idiom

Getting ready

How to do it...

How it works...

See also

Static polymorphism with the curiously recurring template pattern

Getting ready

How to do it...

How it works...

There’s more...

See also

Adding functionality to classes with mixins

How to do it…

How it works…

See also

Handling unrelated types generically with the type erasure idiom

Getting ready

How to do it…

How it works…

See also

Implementing a thread-safe singleton

Getting ready

How to do it...

How it works...

There’s more...

See also

Exploring Testing Frameworks

Getting started with Boost.Test

Getting ready

How to do it...

How it works...

There’s more...

See also

Writing and invoking tests with Boost.Test

Getting ready

How to do it...

How it works...

See also

Asserting with Boost.Test

Getting ready

How to do it...

How it works...

See also

Using fixtures in Boost.Test

Getting ready

How to do it...

How it works...

See also

Controlling output with Boost.Test

Getting ready

How to do it...

How it works...

There’s more...

See also

Getting started with Google Test

Getting ready

How to do it...

How it works...

There’s more...

See also

Writing and invoking tests with Google Test

Getting ready

How to do it...

How it works...

See also

Asserting with Google Test

How to do it...

How it works...

See also

Using test fixtures with Google Test

Getting ready

How to do it...

How it works...

See also

Controlling output with Google Test

Getting ready

How to do it...

How it works...

See also

Getting started with Catch2

Getting ready

How to do it...

How it works...

There’s more...

See also

Writing and invoking tests with Catch2

How to do it...

How it works...

See also

Asserting with Catch2

Getting ready

How to do it...

How it works...

See also

Controlling output with Catch2

Getting ready

How to do it…

How it works...

See also

C++ 20 Core Features

Working with modules

Getting ready

How to do it…

How it works...

See also

Understanding module partitions

Getting ready

How to do it...

How it works...

There’s more...

See also

Specifying requirements on template arguments with concepts

Getting ready

How to do it...

How it works...

There’s more...

See also

Using requires expressions and clauses

Getting ready

How to do it...

How it works...

See also

Exploring abbreviated function templates

How to do it…

How it works…

See also

Iterating over collections with the ranges library

Getting ready

How to do it...

How it works...

There’s more...

See also

Exploring the standard range adaptors

Getting ready

How to do it…

How it works…

See also

Converting a range to a container

Getting ready

How to do it…

How it works…

See also

Creating your own range view

Getting ready

How to do it...

How it works...

See also

Using constrained algorithms

How to do it…

How it works…

See also

Creating a coroutine task type for asynchronous computations

Getting ready

How to do it...

How it works...

There’s more...

See also

Creating a coroutine generator type for sequences of values

Getting ready

How to do it...

How it works...

There’s more...

See also

Generating a sequence of values with the std::generator type

How to do it…

How it works…

See also

Other Books You May Enjoy

Index

Landmarks

Cover

Index

Preface

C++ is one of the most popular and widely used programming languages, and it has been that way for three decades. Designed with a focus on performance, efficiency, and flexibility, C++ combines paradigms such as object-oriented, imperative, generic, and functional programming. C++ is standardized by the International Organization for Standardization (ISO) and has undergone massive changes over the last decade and a half. With the standardization of C++11, the language has entered a new age, which has been widely referred to as modern C++. Type inference, move semantics, lambda expressions, smart pointers, uniform initialization, variadic templates, and many other recent features have changed the way we write code in C++ to the point that it almost looks like a new programming language. This change has been further advanced with the release of C++20, which includes many new changes to the language, such as modules, concepts, and coroutines, as well as changes to the standard library, such as ranges, text formatting, and calendars. And now, the language is moving even further with more changes introduced in C++23 and the upcoming C++26.

This book addresses many of the new features included in C++11, C++14, C++17, C++20, and C++23. This book is organized into recipes, each covering one particular language or library feature, or a common problem that developers often face and the typical solution to it using modern C++. Through more than 150 recipes, you will learn to master both core language features and the standard libraries; including those for strings, containers, algorithms, iterators, streams, regular expressions, threads, filesystem, atomic operations, utilities, and ranges.

This third edition of the book took several months to write, and during this time the work on the C++23 standard has been completed. However, at the time of writing this preface, the standard is yet to be approved and will be published this year (2024).

More than 30 new or updated recipes in the second and third editions cover C++20 features, including modules, concepts, coroutines, ranges, threads and synchronization mechanisms, text formatting, calendars and time zones, immediate functions, the three-way comparison operator, and the new std::span class. Almost 20 new or updated recipes in this third edition cover C++23 features, including the std::expected class, the std::mdspan class, the stacktrace library, the span buffer, the multi-dimensional subscript operator, and the additions to the text format library.

All the recipes in the book contain code samples that show you how to use a feature or how to solve a problem. These code samples have been written using Visual Studio 2022, but have also been compiled using Clang and GCC. Since the support for various language and library features has been gradually added to all these compilers, it is recommended that you use the latest version of each to ensure that all of the new features are supported.

At the time of writing this preface, the latest versions are GCC 14.0, Clang 18.0, and VC++ 2022 version 14.37 (from Visual Studio 2019 version 17.7). Although all these compilers are C++17 complete, the support for C++23 varies from compiler to compiler. Please refer to https://en.cppreference.com/w/cpp/compiler_support to check your compiler’s support for C++23 features.

Who this book is for

This book is intended for all C++ developers, regardless of their experience level. The typical reader is an entry- or medium-level C++ developer who wants to master the language and become a prolific modern C++ developer. The experienced C++ developer will find a good reference for many C++11, C++14, C++17, C++20, and C++23 language and library features that may come in handy from time to time. The book consists of more than 150 recipes that span simple, to intermediate, and even advanced. However, they all require prior knowledge of C++, and that includes functions, classes, templates, namespaces, macros, and others. Therefore, if you are not familiar with the language, it is recommended that you first read an introductory book to familiarize yourself with the core aspects, and then proceed with this book.

What this book covers

Chapter 1, Learning Modern Core Language Features, teaches you about modern core language features, including type inference, uniform initialization, scoped enumerations, range-based for loops, structured bindings, class template argument deduction, and others.

Chapter 2, Working with Numbers and Strings, discusses how to convert between numbers and strings, generate pseudo-random numbers, work with regular expressions and various types of string, as well as how to format text using the C++20 text formatting library.

Chapter 3, Exploring Functions, dives into defaulted and deleted functions, variadic templates, lambda expressions, and higher-order functions.

Chapter 4, Preprocessing and Compilation, takes a look at various aspects of compilation, from how to perform conditional compilation, to compile-time assertions, code generation, and hinting the compiler with attributes.

Chapter 5, Standard Library Containers, Algorithms, and Iterators, introduces you to several standard containers, many algorithms, and teaches you how to write your own random-access iterator.

Chapter 6, General-Purpose Utilities, dives into the chrono library, including the C++20 calendars and time zones support; the any, optional, variant, and span and mdspan types; and type traits.

Chapter 7, Working with Files and Streams, explains how to read and write data to/from streams, use I/O manipulators to control streams, and explores the filesystem library.

Chapter 8, Leveraging Threading and Concurrency, teaches you how to work with threads, mutexes, locks, condition variables, promises, futures, atomic types, as well as the C++20 latches, barriers, and semaphores.

Chapter 9, Robustness and Performance, focuses on exceptions, constant correctness, type casts, smart pointers, and move semantics.

Chapter 10, Implementing Patterns and Idioms, covers various useful patterns and idioms, such as the pimpl idiom, the non-virtual interface idiom, the curiously recurring template pattern, and mixins.

Chapter 11, Exploring Testing Frameworks, gives you a kickstart with three of the most widely used testing frameworks, Boost.Test, Google Test, and Catch2.

Chapter 12, C++20 Core Features, introduces you to the most important new additions to the C++20 standard—modules, concepts, coroutines, and ranges, including updates in C++23.

What’s new in this edition

This section provides a list of new or updated recipes along with a short description of the change.

Chapter 1, Learning Modern Core Language Features:

Using scope enumeration: updated with C++23 std::to_underlying and std::is_scoped_enumUsing range-based for loops to iterate on a range: updated with the C++23 init statementUsing the subscript operator to access elements in a collection: (new) C++23 multidimensional subscript operator

Chapter 2, Working with Numbers and Strings:

Understanding the various numeric types: (new) explains the C++ numerical typesUnderstanding the various character and string types: (new) explains the C++ character typesPrinting Unicode characters to the output console: (new) discusses working with UNICODE and printing to the consoleCreating a library of string helpers: updated with C++20 starts_with(), ends_with(), and contains()Formatting and printing text with std::format and std::print: updated with C++23 std::print() and std::println()Using std::format with user-defined types: updated with C++23 std::formattable and better examples

Chapter 3, Exploring Functions:

Using lambdas with standard algorithms: updated with C++23 attributes on function call operatorsWriting a recursive lambda: updated with C++14 recursive generic lambdasWriting function templates: (new) a walkthrough of writing function templates

Chapter 4, Preprocessing and Compilation:

Conditionally compiling your source code: updated with C++23 #warning, #elifdef, and #elifndefPerforming compile time assertion checks with static_assert: updated with C++26 user-generated messagesProviding metadata to the compiler with attributes: updated with C++23 attributes on lambda, [[assume]], and duplicate attributes

Chapter 5, Standard Library Containers, Algorithms, and Iterators:

Using vector as default container: updated with C++23 range-aware member functionsSelecting the right standard containers (new) a comparison of standard containers

Chapter 6, General-Purpose Utilities:

Working with calendars: updated with C++20-compliant examplesConverting times between timezones: updated with C++20-compliant examplesChaining together computations which may or may not produce a value: (new) discusses the C++23 std::optional monadic operationsUsing std::expected for returning a value or an error: (new) discusses the C++23 std::expected typeUsing std::mdspan for multidimensional views of sequences of objects: (new) explores the C++23 std::mdspan typeProviding logging details with source_location: (new) explores the C++20 std::source_location typeUsing the stacktrace library to print the call stack: (new) teaches the C++23 stacktrace library

Chapter 7, Working with Files and Streams:

Using streams on fixed-size external buffers: (new) explores the C++23 span buffers

Chapter 8, Leveraging Threading and Concurrency:

Using thread synchronization mechanisms: updated with C++20-compliant samplesSynchronizing output streams: (new) discusses the C++20 sync streams

Chapter 9, Robustness and Performance:

Creating compile-time constant expressions: updated with C++23 static constexpr variablesOptimizing code in constant-evaluated contexts: (new) explains the C++23 if constevalUsing virtual function calls in constant expressions: (new) discusses the C++20 constexpr virtual functions

Chapter 10, Implementing Patterns and Idioms:

Adding functionality to classes with mixins: (new) explains the mixins patternHandling unrelated types generically with type erasure: (new) discusses the type erasure idiom

Chapter 11, Exploring Testing Frameworks:

Getting started with Catch2: updated installation instructions for Catch2 version 3.4.0Asserting with Catch2: updated examples for Catch2 version 3.4.0

Chapter 12, C++20 Core Features:

Exploring abbreviated function templates: (new) examines C++20 abbreviated function templatesExploring the standard range adaptors: (new) discusses the C++20 and C++23 range adaptorsConverting a range to a container: (new) explains how to convert a range to a standard container using C++23 std::ranges::to()Using constrained algorithms: (new) explores the general-purpose algorithms that work directly with rangesCreating a coroutine task for asynchronous computation: updated with standard compliant examples (and alternatives with the libcoro library)Creating a coroutine generator type for sequences of values: updated with standard compliant examples (and alternatives with the libcoro library)Recursively generating values with the std::generator type: (new) explains the C++23 std::generator

To get the most out of this book

The code presented in the book is available for download from https://github.com/PacktPublishing/Modern-Cpp-Programming-Cookbook-Third-Edition, although I encourage you to try writing all the samples by yourself. In order to compile them, you need VC++ 2022 17.7 on Windows and GCC 14.0 or Clang 18.0 on Linux and Mac. If you don’t have the latest version of the compiler, or you want to try another compiler, you can use one that is available online.

Although there are various online platforms that you could use, I recommend Wandbox, available at https://wandbox.org/, and Compiler Explorer, available at https://godbolt.org/.

Download the example code files

The code bundle for the book is hosted on GitHub at https://github.com/PacktPublishing/Modern-Cpp-Programming-Cookbook-Third-Edition. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://packt.link/gbp/9781835080542.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. For example: “The geometry module was defined in a file called geometry.ixx/.cppm, although any file name would have had the same result.”

A block of code is set as follows:

static std::map< std::string, std::function<std::unique_ptr<Image>()>> mapping { { "bmp", []() {return std::make_unique<BitmapImage>(); } }, { "png", []() {return std::make_unique<PngImage>(); } }, { "jpg", []() {return std::make_unique<JpgImage>(); } } };

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are highlighted:

static std::map< std::string, std::function<std::unique_ptr<Image>()>> mapping { { "bmp", []() {return std::make_unique<BitmapImage>(); } }, { "png", []() {return std::make_unique<PngImage>(); } }, { "jpg", []() {return std::make_unique<JpgImage>(); } } };

Any command-line input or output is written as follows:

running thread 140296854550272 running thread 140296846157568 running thread 140296837764864

Bold: Indicates a new term, an important word, or words that you see on the screen, for example, in menus or dialog boxes, also appear in the text like this. For example: “Select System info from the Administration panel.”

Warnings or important notes appear like this.

Tips and tricks appear like this.

Get in touch

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