Introducing std::span, a new view on arrays

In this recipe, we will learn how to use std::span, which is a new feature coming with C++20. This recipe is important as std::span is a descendant of the Guideline Support Library's gsl::span, which is a core component of the library used to ensure that your C++ is Core Guideline-compliant. In this recipe, we will not only introduce std::span, but we will also explain how to use it in your own code and why it helps to encapsulate an array with its size as well as provide a convenient API for working with arrays in general.

Getting ready

Before beginning, please ensure that all of the technical requirements are met, including installing Ubuntu 19.04 or higher and running the...