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C++ High Performance

You're reading from   C++ High Performance Master the art of optimizing the functioning of your C++ code

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Product type Paperback
Published in Dec 2020
Publisher Packt
ISBN-13 9781839216541
Length 544 pages
Edition 2nd Edition
Languages
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Authors (2):
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Björn Andrist Björn Andrist
Author Profile Icon Björn Andrist
Björn Andrist
 Sehr Sehr
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Sehr
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Table of Contents (17) Chapters Close

Preface 1. A Brief Introduction to C++ 2. Essential C++ Techniques FREE CHAPTER 3. Analyzing and Measuring Performance 4. Data Structures 5. Algorithms 6. Ranges and Views 7. Memory Management 8. Compile-Time Programming 9. Essential Utilities 10. Proxy Objects and Lazy Evaluation 11. Concurrency 12. Coroutines and Lazy Generators 13. Asynchronous Programming with Coroutines 14. Parallel Algorithms 15. Other Books You May Enjoy
16. Index

Function objects and lambda expressions

Lambda expressions, introduced in C++11, and further enhanced with every C++ version since, are one of the most useful features in modern C++. Their versatility comes not only from easily passing functions to algorithms, but also their use in a lot of circumstances where you need to pass the code around, especially as you can store a lambda in a std::function.

Although lambdas made these programming techniques vastly simpler to work with, everything mentioned in this section is possible to perform without them. A lambda—or, more formally, a lambda expression—is a convenient way of constructing a function object. But instead of using lambda expressions, we could instead implement classes with operator() overloaded, and then instantiate these to create function objects.

We will explore the lambda's similarities to these kinds of classes later, but first I will introduce lambda expressions in a simple use case.

The...

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C++ High Performance - Second Edition
Published in: Dec 2020
Publisher: Packt
ISBN-13: 9781839216541
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