My book C++20 is a tutorial and a reference for the C++20 standard. It teaches you C++20 and provides details of this new, thrilling C++ standard. The exciting factor is mainly due to the big four of C++20.

• Concepts change the way we think and program templates. They are semantic categories for the template parameters and enable you to express your intention directly in the type system. If something goes wrong, you get a clear error message.
• The new ranges library enables it to perform algorithms directly on the container, compose the algorithm with the pipe symbol, and apply them to infinite data streams.
• Thanks to coroutines, asynchronous programming in C++ has become mainstream. Coroutines are the base for cooperative tasks, event loops, infinite data streams, or pipelines.
• Modules overcome the restrictions of header files. They promise a lot. For example, the separation of header and source files becomes obsolete as the preprocessor. Ultimately, we have faster built time and an easier way to build packages.

• C++11 and C++14 have the basic building blocks for creating concurrent or parallel programs.
• With C++17, we got the parallel algorithms of the Standard Template Library (STL). That means most of the algorithms of the STL can be executed sequentially, in parallel, or vectorized.
• The concurrency story in C++ goes on. With C++20, we got coroutines, atomic smart pointers, semaphores, latches, and barriers.
• C++23 supports the first concrete coroutine: std::generator.
• With future C++ standards, we can hope for executors, extended futures, transactional memory, and more.

This book explains the details of concurrency in modern C++ and gives you nearly 200 running code examples. Therefore, you can combine theory with practice and get the most out of it.

Because this book is about concurrency, I present many pitfalls and show you how to overcome them.

The book is 100 % finished, but I will update it regularly. The next update is probably about C++26. Furthermore, I will write about lock-free concurrent data structure and patterns for parallelization.

"The C++ Standard Library" provides a detailed overview of the C++ Standard Library, including C++23.

The Goal

The C++ Standard Library aims to provide a concise reference of the C++ standard library in about 350 pages. This book assumes that you are familiar with C++. If so, you will get the most benefit from this book. If C++ is new to you, you should start with a textbook about core C++. Once you have mastered a textbook about the core language, you can make your next big step by reading my book.

This book also has more than 150 running code examples for the code snippets I present. Therefore, you can combine theory with practice and get the most out of it.

Many Thanks

In particular, I thank the English proofreaders of my book: Mahesh Attarde, Rick Audet, Pete Barrow, Michael Ben-David, Dave Burns, Alvaro Fernandez, Juliette Grimm, Marius Grimm, George Haake, Nicola Jaud-Stoll, Clare Macrae, Arne Mertz, Ian Reeve, Jason Turner, Bart Vandewoestyne, Ivan Vergiliev, and Andrzej Warzynski. They translated my Swabian English into English. Without their work, the book wouldn't have been possible.