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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Working with filesystem paths

An important addition to the C++17 standard is the filesystem library that enables us to work with paths, files, and directories in hierarchical filesystems (such as Windows or POSIX filesystems). This standard library has been developed based on the boost.filesystem library. In the next few recipes, we will explore those features of the library that enable us to perform operations with files and directories, such as creating, moving, or deleting them, but also querying properties and searching. It is important, however, to first look at how this library handles paths.

Getting ready

For this recipe, we will consider most of the examples using Windows paths. In the accompanying code, all examples have both Windows and POSIX alternatives.

The filesystem library is available in the std::filesystem namespace, in the <filesystem> header. To simplify the code, we will use the following namespace alias in all of the examples: