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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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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

Forwarding references

One of the most important features that were added to the language in C++11 is move semantics, which helps improve performance by avoiding making unnecessary copies. Move semantics are supported by another C++11 feature called rvalue references. Before discussing these, it is worth mentioning that, in C++, we have two kinds of values:

  • lvalues are values that refer to a memory location and, therefore, we can take their address with the & operator. lvalues can appear both on the left and right sides of an assignment expression.
  • rvalues are values that are not lvalues. They are defined by exclusion. rvalues do not refer to a memory location and you can’t take their address with the & operator. rvalues are literals and temporary objects and can only appear on the right side of an assignment expression.

    Note

    In C++11, there are a few other value categories, glvalue, prvalue, and xvalue. Discussing them here would not benefit the current topic...

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