Programming with C++20 teaches programmers with C++ experience the new features of C++20 and how to apply them. It does so by assuming C++11 knowledge. Elements of the standards between C++11 and C++20 will be briefly introduced, if necessary. However, the focus is on teaching the features of C++20.

You will start with learning about the so-called big four Concepts, Coroutines, std::ranges, and modules. The big four are followed by smaller yet not less important features. You will learn about std::format, the new way to format a string in C++. In Chapter 6, you will learn about a new operator, the so-called spaceship operator, which makes you write less code.

You then will look at various language improvements, ensuring more consistency and reducing surprises. You will learn how lambdas improved in C++20 and what new elements you can now pass as non-type template parameters. Your next stop is the improvements to the STL.

Of course, you will not end this book without learning about what happened in the constexpr-world.