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)

Use iterator adapters to fill STL containers

An iterator is essentially an abstraction. It has a specific interface and is used in specific ways. But beyond that, it's just code and it can be used for other purposes. An iterator adapter is a class that looks like an iterator but does something else.

The STL comes with an assortment of iterator adapters. Often used with the algorithm library, they are quite useful. The STL iterator adaptors generally fall into three categories:

  • Insert iterators, or inserters, are used to insert elements into a container.
  • Stream iterators read from and write to a stream.
  • Reverse iterators reverse the direction of an iterator.

How to do it…

In this recipe, we'll look at a few examples of STL iterator adapters:

  • We'll start with a simple function to print the contents of a container:
    void printc(const auto & v, const string_view s = "") {
        if(s.size()) cout &lt...