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Modern C++ Programming Cookbook

You're reading from   Modern C++ Programming Cookbook Master Modern C++ with comprehensive solutions for C++23 and all previous standards

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Product type Paperback
Published in Feb 2024
Publisher Packt
ISBN-13 9781835080542
Length 816 pages
Edition 3rd Edition
Languages
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Author (1):
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Marius Bancila Marius Bancila
Author Profile Icon Marius Bancila
Marius Bancila
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Toc

Table of Contents (15) Chapters Close

Preface 1. Learning Modern Core Language Features FREE CHAPTER 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

Exploring abbreviated function templates

In Chapter 3, we learned about function templates as well as lambda expressions, including generic and template lambdas. A generic lambda is a lambda expression that uses auto specified for one of its parameters. The result is a function object with a templated call operator. The same is produced as a result of defining a lambda template that has the advantage, over generic lambdas, of allowing better control over the types of the parameters. In C++20, this idea of using the auto specifier for parameter types is generalized for all functions.

This introduces a simplified syntax of defining function templates, and functions that are defined in this way are called abbreviated function templates. We will see in this recipe how to use them.

How to do it…

You can define the following categories of abbreviated function templates in C++20:

  • Unconstrained abbreviated function templates that use the auto specifier to define...
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