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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Using std::format with user-defined types

The C++20 formatting library is a modern alternative to using printf-like functions or the I/O streams library, which it actually complements. Although the standard provides default formatting for basic types, such as integral and floating-point types, bool, character types, strings, and chrono types, the user can create custom specialization for user-defined types. In this recipe, we will learn how to do that.

Getting ready

You should read the previous recipe, Formatting text with std::format, to familiarize yourself with the formatting library.

In the examples that we'll be showing here, we will use the following class:

struct employee
   int         id;
   std::string firstName;
   std::string lastName;

In the next section, we'll introduce the necessary steps to implement to enable text formatting using std::format() for user-defined types.

How to do it...

To enable formatting using the new...