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 Be sure that knowledge from this book won’t get outdated, as more and more Boost libraries become part of the C++ Standard.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

Detecting and bypassing disabled RTTI


Some companies and libraries have specific requirements for their C++ code, such as successful compilation without RTTI.

In this small recipe, we'll not just detect disabled RTTI, but also write a Boost like library from scratch that stores information about types, and compares types at runtime, even without typeid.

Getting ready

Basic knowledge of C++ RTTI usage is required for this recipe.

How to do it...

Detecting disabled RTTI, storing information about types, and comparing types at runtime are tricks that are widely used across Boost libraries.

  1. To do this, we first need to include the following header:
#include <boost/config.hpp> 
  1. Let's first look at the situation where RTTI is enabled and the C++11 std::type_index class is available:
#if !defined(BOOST_NO_RTTI) \
    && !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)

#include <typeindex>
using std::type_index;

template <class T>
type_index type_id() {
    return typeid(T);
}
  1. Otherwise...