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    Beyond the C++ Standard Library: An Introduction to Boost
    Table of Contents
    Copyright
    Foreword
    Preface
    Acknowledgments
    About the Author
    Organization of This Book
    Introduction to Boost
    String and Text Processing
    Data Structures, Containers, Iterators, and Algorithms
    Function Objects and Higher-Order Programming
    Generic Programming and Template Metaprogramming
    Math and Numerics
    Input/Output
    Miscellaneous
    Part I. General Libraries
    Library 1. Smart_ptr
    How Does the Smart_ptr Library Improve Your Programs?
    When Do We Need Smart Pointers?
    How Does Smart_ptr Fit with the Standard Library?
    scoped_ptr
    scoped_array
    shared_ptr
    shared_array
    intrusive_ptr
    weak_ptr
    Smart_ptr Summary
    Endnotes
    Library 2. Conversion
    How Does the Conversion Library Improve Your Programs?
    polymorphic_cast
    polymorphic_downcast
    numeric_cast
    lexical_cast
    Conversion Summary
    Library 3. Utility
    How Does the Utility Library Improve Your Programs?
    BOOST_STATIC_ASSERT
    checked_delete
    noncopyable
    addressof
    enable_if
    Utility Summary
    Library 4. Operators
    How Does the Operators Library Improve Your Programs?
    Operators
    Usage
    Operators Summary
    Library 5. Regex
    How Does the Regex Library Improve Your Programs?
    How Does Regex Fit with the Standard Library?
    Regex
    Usage
    Regex Summary
    Part II. Containers and Data Structures
    Library 6. Any
    How Does the Any Library Improve Your Programs?
    How Does Any Fit with the Standard Library?
    Any
    Usage
    Any Summary
    Library 7. Variant
    How Does the Variant Library Improve Your Programs?
    How Does Variant Fit with the Standard Library?
    Variant
    Usage
    Variant Summary
    Library 8. Tuple
    How Does the Tuple Library Improve Your Programs?
    How Does the Tuple Library Fit with the Standard Library?
    Tuple
    Usage
    Tuple Summary
    Part III. Function Objects and Higher-Order Programming
    Library 9. Bind
    How Does the Bind Library Improve Your Programs?
    How Does Bind Fit with the Standard Library?
    Bind
    Usage
    Bind Summary
    Library 10. Lambda
    How Does the Lambda Library Improve Your Programs?
    How Does Lambda Fit with the Standard Library?
    Lambda
    Usage
    Lambda Summary
    Library 11. Function
    How Does the Function Library Improve Your Programs?
    How Does Function Fit with the Standard Library?
    Function
    Usage
    Function Summary
    Library 12. Signals
    How Does the Signals Library Improve Your Programs?
    How Does Signals Fit with the Standard Library?
    Signals
    Usage
    Signals Summary
    Endnotes
    Index
    SYMBOL
    A
    B
    C
    D
    E
    F
    G
    H
    I
    J
    K
    L
    M
    N
    O
    P
    R
    S
    T
    U
    V
    W
    Beyond the C++ Standard Library: An Introduction to Boost By Björn Karlsson ............................................... Publisher: Addison Wesley Professional Pub Date: August 31, 2005 ISBN: 0321133544 Pages: 432 Table of Contents | Index
    Introducing the Boost libraries: the next breakthrough in C++ programming Boost takes you far beyond the C++ Standard Library, making C++ programming more elegant, robust, and productive. Now, for the first time, a leading Boost expert systematically introduces the broad set of Boost libraries and teaches best practices for their use. Writing for intermediate-to-advanced C++ developers, Björn Karlsson briefly outlines all 58 Boost libraries, and then presents comprehensive coverage of 12 libraries you're likely to find especially useful. Karlsson's topics range from smart pointers and conversions to containers and data structures, explaining exactly how using each library can improve your code. He offers detailed coverage of higher-order function objects that enable you to write code that is more concise, expressive, and readable. He even takes you "behind the scenes" with Boost, revealing tools and techniques for creating your own generic libraries. Coverage includes         Smart pointers that provide automatic lifetime management of objects and simplify resource sharing Consistent, best-practice solutions for performing type conversions and lexical conversions Utility classes that make programming simpler and clearer Flexible container libraries that solve common problems not covered by the C++ Standard Library Powerful support for regular expressions with Boost.Regex Function objects defined at the call site with Boost.Bind and Boost.Lambda More flexible callbacks with Boost.Function Managed signals and slots (a.k.a. the Observer pattern) with Boost.Signals The Boost libraries are proving so useful that many of them are planned for inclusion in the next version of the C++ Standard Library. Get your head start now, with Beyond the C++ Standard Library. © Copyright Pearson Education. All rights reserved.
    Beyond the C++ Standard Library: An Introduction to Boost By Björn Karlsson ............................................... Publisher: Addison Wesley Professional Pub Date: August 31, 2005 ISBN: 0321133544 Pages: 432 Table of Contents | Index Copyright Foreword Preface Acknowledgments About the Author Organization of This Book Introduction to Boost String and Text Processing Data Structures, Containers, Iterators, and Algorithms Function Objects and Higher-Order Programming Generic Programming and Template Metaprogramming Math and Numerics Input/Output Miscellaneous Part I. General Libraries Library 1. Smart_ptr How Does the Smart_ptr Library Improve Your Programs? When Do We Need Smart Pointers? How Does Smart_ptr Fit with the Standard Library? scoped_ptr scoped_array shared_ptr shared_array intrusive_ptr weak_ptr Smart_ptr Summary Endnotes Library 2. Conversion How Does the Conversion Library Improve Your Programs? polymorphic_cast polymorphic_downcast numeric_cast lexical_cast Conversion Summary Library 3. Utility How Does the Utility Library Improve Your Programs? BOOST_STATIC_ASSERT checked_delete noncopyable addressof enable_if
    Utility Summary Library 4. Operators How Does the Operators Library Improve Your Programs? Operators Usage Operators Summary Library 5. Regex How Does the Regex Library Improve Your Programs? How Does Regex Fit with the Standard Library? Regex Usage Regex Summary Part II. Containers and Data Structures Library 6. Any How Does the Any Library Improve Your Programs? How Does Any Fit with the Standard Library? Any Usage Any Summary Library 7. Variant How Does the Variant Library Improve Your Programs? How Does Variant Fit with the Standard Library? Variant Usage Variant Summary Library 8. Tuple How Does the Tuple Library Improve Your Programs? How Does the Tuple Library Fit with the Standard Library? Tuple Usage Tuple Summary Part III. Function Objects and Higher-Order Programming Library 9. Bind How Does the Bind Library Improve Your Programs? How Does Bind Fit with the Standard Library? Bind Usage Bind Summary Library 10. Lambda How Does the Lambda Library Improve Your Programs? How Does Lambda Fit with the Standard Library? Lambda Usage Lambda Summary Library 11. Function How Does the Function Library Improve Your Programs? How Does Function Fit with the Standard Library? Function Usage Function Summary Library 12. Signals How Does the Signals Library Improve Your Programs? How Does Signals Fit with the Standard Library? Signals Usage
    Signals Summary Endnotes Index
    Copyright Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. Where those designations appear in this book, and the publisher was aware of a trademark claim, the designations have been printed with initial capital letters or in all capitals. The author and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained herein. The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may include electronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U. S. Corporate and Government Sales (800) 382-3419 corpsales@pearsontechgroup.com For sales outside the U. S., please contact: International Sales international@pearsoned.com Visit us on the Web: www.awprofessional.com Library of Congress Catalog Number: 2005927496 Copyright © 2006 Pearson Education, Inc. All rights reserved. Printed in the United States of America. This publication is protected by copyright, and permission must be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permissions, write to: Pearson Education, Inc. Rights and Contracts Department One Lake Street Upper Saddle River, NJ 07458 Text printed in the United States on recycled paper at R.R. Donnelley in Crawfordsville, Indiana. First printing, August 2005 Dedication In memory of the dead, in honor of the living.
    Foreword Good things are happening in the C++ community. Although C++ remains the most widely used programming language in the world, it is becoming even more powerful and yet easier to use. Skeptical? Bear with me. The current version of standard C++, which was finalized in 1998, offers robust support for traditional procedural programming as well as object-oriented and generic programming. Just as old (pre-1998) C++ was single-handedly responsible for putting object-oriented within the reach of the workaday software developer, C++98 has done the same for generic programming. The integration of the Standard Template Library (STL) into standard C++ in the mid-1990s represented as much a paradigm shift as did Bjarne Stroustrup's adding classes to C in the early 1980s. Now that the majority of C++ practitioners are proficient with concepts of STL, it's once again time to raise the bar. Applications of the power of C++ are still being discovered. Many of today's C++ libraries, and mathematical libraries in particular, take routine advantage of template metaprogramming, a fortuitous but unforeseen result of the brilliant design of C++ templates. As higher-level tools and techniques come to light in the C++ community, developing increasingly complex applications is becoming more straightforward and enjoyable. It is difficult to overstate the importance of Boost to the world of C++. Since the ratification of C++98, no entity outside of the ISO Committee for Standard C++ (called WG21) has done more to influence the direction of C++ than has Boost (and many Boost subscribers are prominent members of WG21, including its founder, my friend Beman Dawes). The thousands of experienced Boost volunteers have, in unselfish, peer-reviewed fashion, developed many useful library solutions not provided by C++98. Ten of its offerings have already been accepted to be integrated into the upcoming C++0x library, and more are under consideration. Where a library approach has been shown to be wanting, the wisdom gained from the cross-pollination of Boost and WG21 has suggested a few modest language enhancements, which are now being entertained. In the rare case that you haven't heard of Boost, let me ask…do you need to convert between text and numbers or (better yet) between any streamable types? No problemuse Boost.lexical_cast. Oh, you have more sophisticated text processing requirements? Then Boost.Tokenizer or Boost.Regex might be for you, or Boost.Spirit, if you need full-blown parsing. Boost.Bind will amaze you with its function projection and composition capabilities. For functional programming there is Boost.Lambda. Static assertions? Got 'em. If you're mathematically inclined, get your pencil out: You have Boost.Math, Graph, Quaternion, Octonion, MultiArray, Random, and Rational. If you are fortunate enough to have discovered the joy of Python, you can use it and C++ together with the help of Boost.Python. And you can practically pick your platform for all of the above. Björn Karlsson is a Boost enthusiast and a heartfelt supporter of the C++ community. He has published useful and well-written articles in the C/C++ Users Journal and, more recently, for The C++ Source, a new online voice for the C++ community (see www.artima.com/cppsource). In this volume, he motivates and illustrates key Boost components, and shows how they work with and extend the C++ Standard Library. Consider this not only an in-depth tutorial on Boost, but also a foretaste of the future version of Standard C++. Enjoy! Chuck Allison, Editor, The C++ Source
    Preface Dear Reader, Welcome to Beyond the C++ Standard Library: An Introduction to Boost. If you are interested in generic programming, library design, and the C++ Standard Library, this book is for you. Because the intended audience for the book is intermediate to advanced C++ programmers, there is little coverage of basic C++ concepts. As the title suggests, the focus of this book is on the Boost librariesgeneral usage, best practices, implementation techniques, and design rationale. Almost from the day I discovered Boost, the people behind it, and the extraordinary libraries in it, I've wanted to write this book. It is amazing that a language as mature as C++ still offers room for exploration into higher-level abstractions as well as technical detail, all without requiring changes to the language. Of course, this is what sets C++ apart from many other programming languages: It is specifically and intentionally designed for extension, and the language's facilities for generic constructs are extremely powerful. This exploration is at the core of the Boost libraries and the Boost community itself. Boost is about making programming in C++ more elegant, more robust, and more productive. As discoveries are made and best practices are shaped, a great challenge faces the C++ community; to share this knowledge with others. In isolation, there is limited value to these remarkable findings, but when exposed to a larger audience, a whole industry will evolve. This book shows how to use a selection of the wonderfully useful Boost libraries, teaches best practices for their use, and even goes behind the scenes to see how they actually work. The Boost libraries' license grants permission to copy, use, and modify the software for any use (commercial and non-commercial), so all you need to do is visit www.boost.org and download the latest version. For all the C++ Standard Library aficionados out there, it is well known that a new revision of the Standard Library is in progress. From a standardization point of view, there are three primary areas where the C++ Standard Library is likely to change:    Fixing broken libraries Augmenting missing features to existing libraries Adding libraries that provide functionality that is missing in the Standard Library The Boost libraries address all of these areas in one way or another. Of the 12 libraries covered in this book, six have already been accepted for inclusion in the upcoming Library Technical Report, which means that they will most likely be part of the next version of the Standard Library. Thus, learning about these libraries has excellent long-term value. I hope that you will find this book to be a valuable tool for using, understanding, and extending the Boost libraries. From that vantage, you'll want to incorporate those libraries and the knowledge enshrined within them into your own designs and implementations. That's what I call reuse. Thank you for reading. Björn Karlsson
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