Book Image

C++20 STL Cookbook

By : Bill Weinman
Book Image

C++20 STL Cookbook

By: Bill Weinman

Overview of this book

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible. Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions. By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (13 chapters)

Chapter 10: Using the File System

The purpose of the STL filesystem library is to normalize file system operations across platforms. The filesystem library seeks to normalize operations, bridging irregularities between POSIX/Unix, Windows, and other file systems.

The filesystem library was adopted from the corresponding Boost library and incorporated into the STL with C++17. At the time of writing, there are still gaps in its implementation on some systems, but the recipes in this chapter have been tested on Linux, Windows, and macOS file systems, and compiled with the latest available versions of the GCC, MSVC, and Clang compilers, respectively.

The library uses the <filesystem> header, and the std::filesystem namespace is commonly aliased as fs:

namespace fs = std::filesystem;

The fs::path class is at the core of the filesystem library. It provides normalized filename and directory path representation across disparate environments. A path object may represent a...