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Template Metaprogramming with C++

You're reading from   Template Metaprogramming with C++ Learn everything about C++ templates and unlock the power of template metaprogramming

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Product type Paperback
Published in Aug 2022
Publisher Packt
ISBN-13 9781803243450
Length 480 pages
Edition 1st 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 (16) Chapters Close

Preface 1. Part 1: Core Template Concepts
2. Chapter 1: An Introduction to Templates FREE CHAPTER 3. Chapter 2: Template Fundamentals 4. Chapter 3: Variadic Templates 5. Part 2: Advanced Template Features
6. Chapter 4: Advanced Template Concepts 7. Chapter 5: Type Traits and Conditional Compilation 8. Chapter 6: Concepts and Constraints 9. Part 3: Applied Templates
10. Chapter 7: Patterns and Idioms 11. Chapter 8: Ranges and Algorithms 12. Chapter 9: The Ranges Library 13. Assignment Answers 14. Other Books You May Enjoy Appendix: Closing Notes

Chapter 6: Concepts and Constraints

The C++20 standard provides a series of significant improvements to template metaprogramming with concepts and constraints. A constraint is a modern way to define requirements on template parameters. A concept is a set of named constraints. Concepts provide several benefits to the traditional way of writing templates, mainly improved readability of code, better diagnostics, and reduced compilation times.

In this chapter, we will address the following topics:

  • Understanding the need for concepts
  • Defining concepts
  • Exploring requires expressions
  • Composing constraints
  • Learning about the ordering of templates with constraints
  • Constraining non-template member functions
  • Constraining class templates
  • Constraining variable templates and template aliases
  • Learning more ways to specify constraints
  • Using concepts to constrain auto parameters
  • Exploring the standard concepts library

By the end of this chapter...

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