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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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Viktor Sehr Viktor Sehr
Author Profile Icon Viktor Sehr
Viktor Sehr
Björn Andrist Björn Andrist
Author Profile Icon Björn Andrist
Björn Andrist
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Toc

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

Fixed size heterogenous collections

The C++ Utility library includes two class templates that can be used for storing multiple values of different types: std::pair and std::tuple. They are both collections with a fixed size. Just like std::array, it's not possible to add more values dynamically at runtime.

The big difference between std::pair and std::tuple is that std::pair can only hold two values, whereas std::tuple can be instantiated with an arbitrary size at compile time. We will begin with a brief introduction to std::pair before moving on to std::tuple.

Using std::pair

The class template std::pair lives in the <utility> header and has been available in C++ since the introduction of the standard template library. It is used in the standard library where algorithms need to return two values, such as std::minmax(), which can return both the smallest and the greatest value of an initializer list:

std::pair<int, int> v = std::minmax...
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