Chapter 8: Ranges and Algorithms

By reaching this point of the book, you have learned everything about the syntax and the mechanism of templates in C++, up to the latest version of the standard, C++20. This has equipped you with the necessary knowledge to write templates from simple forms to complex ones. Templates are the key to writing generic libraries. Even though you might not write such a library yourself, you’d still be using one or more. In fact, the everyday code that you’re writing in C++ uses templates. And the main reason for that is that as a modern C++ developer, you’re using the standard library, which is a library based on templates.

However, the standard library is a collection of many libraries, such as the containers library, iterators library, algorithms library, numeric library, input/output library, filesystem library, regular expressions library, thread support library, utility libraries, and others. Overall, it’s a large library...