C++ Move Semantics - The Complete Guide
This book is 75% complete
Last updated on 2020-01-17
About the Book
Move semantics, introduced with C++11, has become a hallmark of modern C++ programming. However, it also complicates the language in many ways. Even after several years of support of move semantics experienced programmers struggle with all the details of move semantics. And style guides still don't recommend the right consequences for programming even of trivial classes.
Time to explain all aspectes of C++ move semantics in detail.
This book teaches move semantics. Starting from the basic principles it motivates and explains all the corner cases of move semantics so that you as a programmer can use move semantics right. The book is valuable for those that are beginning to learn about move semantics and is essential for those that are using it already.
You will learn:
- Motivation and terminology of move semantics
- How and why you implicitly benefit from move semantics
- How to explicitly benefit from move semantics
- All traps and how to deal with them
- All consequences for your programming style
As usual for books by Nicolai Josuttis, the focus lies on the application of the new features in practice. Compelling examples and useful background information help to understand and improve code from trivial classes up to generic foundation libraries and frameworks.
Buy early, pay less, free updates
Note that this book is published step-by-step. It started with 110 pages first published in January 2020. Since then the contents grows with new chapters, examples, and caveats about the features of move semantics and I integrate all feedback I get for the pages already published.
Currently, a few key chapters are missing (but there is already enough to read) and no proof reading is done yet (yes, I am not a native English writer). See www.cppmove.com for a detailed list of covered topics.
As written, once you bought it you will get all updates for free.
There is not errata yet, but I welcome all feedback to improve the current version.
Look at http://www.cppmove.com/feedback.html.
PDF versus Other Formats
I write the book in LaTeX and generate PDF from it (the way I wrote my other books). The other formats (epub, mobi, and online reading) come from the leanpub markdown interface, for which I generate the necessary input from LaTeX by script.
Thus, the PDF layout has a better quality than the other formats. For example, the syntax highlighting rules for the formats other than PDF have to get fixed as soon as possible and the index is missing yet. Leanpub and me are working on corresponding improvements.
I hope you enjoy and benefit.
The Power of Move Semantics
- Motivation for Move Semantics
- Implementing Move Semantics
- Copying as Fallback
Core Features of Move Semantics
- Rvalue References
- Overloading by Different References
- Passing by Value
Move Semantics in Classes
- Move Semantics in Ordinary Classes
- Implementing Move Constructor and Move Assignment Operator
- Rules for Special Member Functions
- The Rule of Five or Three
- Move Semantics in Class Hierarchies
How to Benefit from Move Semantics
- Avoid Objects with Names
- Initialize Members with Move Semantics
Overloading on Reference Qualifiers
- Return Type of Getters
- Overloading on Qualifiers
- When to Use Reference Qualifiers
Move Semantics and
Value Categories and Reference Binding
- Value Categories
- Impact of Values Categories When Binding to References
- When Lvalues become Rvalues
- When Rvalues become Lvalues
Checking Value Categories with
- Motivation for Perfect Forwarding
- Implementing Perfect Forwarding
- Rvalue References versus Universal References
- Overload Resolution with Universal Reverences
Tricky Details of Perfect Forwarding
- Universal References as Non-Forwarding References
- Universal or Ordinary Rvalue Reference?
- Perfect Forwarding in Lambdas
- How the Standard Specifies Perfect Forwarding
- Could we Implement Initial Constructors with Perfect Forwarding?
- Nasty Details of Perfect Forwarding and Universal References
Perfect Passing with
- Default Perfect Passing
Universal References with
auto&&as Non-Forwarding Reference
auto&&in Lambdas and Ordinary Functions
Perfect Returning with
- Unmaterialized Return Value Passing
Move Semantics in Core Types of the C++ Standard Library
- Move Semantics for Pairs
- Move Semantics for Strings
- Move Semantics for Containers
- Move Iterators
- Move Semantics for Unique Pointers
- Move Semantics for I/O Streams
- Move Semantics for Threads
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