Book Image

Boost C++ Application Development Cookbook - Second Edition

By : Anton Polukhin Alekseevic
Book Image

Boost C++ Application Development Cookbook - Second Edition

By: Anton Polukhin Alekseevic

Overview of this book

If you want to take advantage of the real power of Boost and C++ and avoid the confusion about which library to use in which situation, then this book is for you. Beginning with the basics of Boost C++, you will move on to learn how the Boost libraries simplify application development. You will learn to convert data such as string to numbers, numbers to string, numbers to numbers and more. Managing resources will become a piece of cake. You’ll see what kind of work can be done at compile time and what Boost containers can do. You will learn everything for the development of high quality fast and portable applications. Write a program once and then you can use it on Linux, Windows, MacOS, Android operating systems. From manipulating images to graphs, directories, timers, files, networking – everyone will find an interesting topic. Be sure that knowledge from this book won’t get outdated, as more and more Boost libraries become part of the C++ Standard.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Using multi-index containers


In the previous recipe, we made some kind of vocabulary, which is good when we need to work with pairs. But, what if we need much more advanced indexing? Let's make a program that indexes persons:

struct person {
    std::size_t     id_;
    std::string     name_;
    unsigned int    height_;
    unsigned int    weight_;

    person(std::size_t id, const std::string& name,
                unsigned int height, unsigned int weight)
        : id_(id)
        , name_(name)
        , height_(height)
        , weight_(weight)
    {}
};

inline bool operator < (const person& p1, const person& p2) {
    return p1.name_ < p2.name_;
}

We will need a lot of indexes, for example, by name, ID, height, and weight.

Getting ready

Basic knowledge about standard library containers and unordered maps is required.

How to do it...

All the indexes can be constructed and managed by a single Boost.Multiindex container.

  1. To do so, we need a lot of includes:
#include <iostream...