Book Image

C++17 STL Cookbook

By : Jacek Galowicz
Book Image

C++17 STL Cookbook

By: Jacek Galowicz

Overview of this book

C++ has come a long way and is in use in every area of the industry. Fast, efficient, and flexible, it is used to solve many problems. The upcoming version of C++ will see programmers change the way they code. If you want to grasp the practical usefulness of the C++17 STL in order to write smarter, fully portable code, then this book is for you. Beginning with new language features, this book will help you understand the language’s mechanics and library features, and offers insight into how they work. Unlike other books, ours takes an implementation-specific, problem-solution approach that will help you quickly overcome hurdles. You will learn the core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on practical real-world recipes. These recipes will help you get the most from the STL and show you how to program in a better way. By the end of the book, you will be up to date with the latest C++17 features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Automatically parallelizing code that uses standard algorithms


C++17 came with one really major extension for parallelism: execution policies for standard algorithms. Sixty nine algorithms were extended to accept execution policies in order to run parallel on multiple cores, and even with enabled vectorization.

For the user, this means that if we already use STL algorithms everywhere, we get a nice parallelization bonus for free. We can easily give our applications subsequent parallelization by simply adding a single execution policy argument to our existing STL algorithm calls.

In this recipe, we will implement a simple program (with a not too serious use case scenario) that lines up multiple STL algorithm calls. While using these, we will see how easy it is to use C++17 execution policies in order to let them run multithreaded. In the last subsections of this section, we will have a closer look at the different execution policies.

How to do it...

In this section, we will write a program that...