Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
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Converting times between time zones

In the previous recipe, we talked about C++20 support for working with calendars and expressing dates in the Gregorian calendar with the year_month_day type and others from the chrono library.

We also saw how to represent times of day with the time_of_day type. However, in all these examples, we worked with the time points using the system clock, which measures Unix time and therefore uses UTC as the default time zone. However, we are usually interested in the local time and, sometimes, in the time in some other time zone. This is possible with the facilities added to the chrono library to support time zones. In this recipe, you will learn about the most important functionalities of chrono's time zones.

Getting ready

Before continuing with this recipe, it is recommended that you read the previous one, Working with calendars, if you have not done so already.

How to do it…

You can do the following using the...