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Modern C++ Programming Cookbook - Third Edition

You're reading from  Modern C++ Programming Cookbook - Third Edition

Product type Book
Published in Feb 2024
Publisher Packt
ISBN-13 9781835080542
Pages 816 pages
Edition 3rd Edition
Languages
Author (1):
Marius Bancila Marius Bancila
Profile icon Marius Bancila

Table of Contents (15) Chapters

Preface 1. Learning Modern Core Language Features 2. Working with Numbers and Strings 3. Exploring Functions 4. Preprocessing and Compilation 5. Standard Library Containers, Algorithms, and Iterators 6. General-Purpose Utilities 7. Working with Files and Streams 8. Leveraging Threading and Concurrency 9. Robustness and Performance 10. Implementing Patterns and Idioms 11. Exploring Testing Frameworks 12. C++ 20 Core Features 13. Other Books You May Enjoy
14. Index

Using std::span for contiguous sequences of objects

In C++17, the std::string_view type was added to the standard library. This is an object that represents a view over a constant contiguous sequence of characters. The view is typically implemented with a pointer to the first element of the sequence and a length. Strings are one of the most used data types in any programming language. They have a non-owning view that does not allocate memory, avoids copies, and performs some operations faster than std::string, which is an important benefit. However, a string is just a special vector of characters with operations specific to text. Therefore, it makes sense to have a type that is a view of a contiguous sequence of objects, regardless of their type. This is what the std::span class template in C++20 represents. We could say that std::span is to std::vector and array types what std::string_view is to std::string.

Getting ready

The std::span class template is available in the header...

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