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Debunking C++ Myths

You're reading from   Debunking C++ Myths Embark on an insightful journey to uncover the truths behind popular C++ myths and misconceptions

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Product type Paperback
Published in Dec 2024
Publisher Packt
ISBN-13 9781835884782
Length 226 pages
Edition 1st Edition
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Authors (2):
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Ferenc Deak Ferenc Deak
Author Profile Icon Ferenc Deak
Ferenc Deak
Alexandru Bolboaca Alexandru Bolboaca
Author Profile Icon Alexandru Bolboaca
Alexandru Bolboaca
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Toc

Table of Contents (15) Chapters Close

Preface 1. Chapter 1: C++ Is Very Difficult to Learn 2. Chapter 2: Every C++ Program Is Standard-Compliant FREE CHAPTER 3. Chapter 3: There’s a Single C++, and It Is Object-Oriented 4. Chapter 4: The Main() Function is the Entry Point to Your Application 5. Chapter 5: In a C++ Class, Order Must There Be 6. Chapter 6: C++ Is Not Memory-Safe 7. Chapter 7: There’s No Simple Way to Do Parallelism and Concurrency in C++ 8. Chapter 8: The Fastest C++ Code is Inline Assembly 9. Chapter 9: C++ Is Beautiful 10. Chapter 10: There Are No Libraries For Modern Programming in C++ 11. Chapter 11: C++ Is Backward Compatible ...Even with C 12. Chapter 12: Rust Will Replace C++ 13. Index 14. Other Books You May Enjoy

A parenthesis concerning parentheses

Now that we are here, we have to mention that there were quite a lot of mentions of parenthesis in this chapter. So, we are presenting possibly the most important pair of parentheses you can encounter during the course of this book.

Please look at the following two functions:

static int y;
decltype(auto) number(int x) {
    return y;
}
decltype(auto) reference(int x) {
    return (y);
}

Those two functions look almost identical, except for the tiny pair of parentheses around the return value. But the presence of those two parentheses makes the biggest difference. The weird-looking decltype(auto) introduced in C++14 is a type specifier that combines the functionality of decltype with automatic type deduction, allowing you to declare a variable with a type that is determined by the expression it is initialized with, while also retaining certain properties of that expression. Unlike auto, which deduces...

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