C++ Lambda Story
C++ Lambda Story
Everything you need to know about Lambda Expressions in Modern C++!
About the Book
This book guides you through the evolution of C++ Lambda Expressions so that you can learn it step by step. We'll start with C++03 and a motivation to have "ad-hoc" functors, and then we'll move into the latest C++ standards:
- C++11 - early days of the feature. You'll learn about all the essential aspects of lambdas and several tricks you might apply. This is the longest chapter as we need to cover a lot of topics.
- C++14 - updates. See how to use generic lambdas and captures with an initialiser.
- C++17 - more improvements, especially by handling `this` pointer and allowing `constexpr`. You'll also learn about the overloaded pattern and how to derive from lambda.
- C++20 - in this section you'll see all of the new features adopted for C++20 like template lambdas and how to use them with concepts and constexpr algorithms.
Additionally, throughout the chapters, you'll learn about the following techniques:
- Immediately Invoked Functional Expressions (IIFE)
- How to instrument a default functor to gather extra information
- Replacing std::bind1st, std::bind2nd and removed functional stuff
- The Overloaded Pattern and how to inherit from a lambda
- Passing C++ captureless lambda as a function pointer to C API
- LIFTING with lambdas
- Storing lambdas in a container
- Variadic templates and arguments packs
- Lambdas and asynchronous execution
- and many more
While the book is 100% ready, I might release some "hot-fixes" smaller releases. All existing readers get new updates for free.
The book is inspired by two articles that appeared at bfilipek.com:
The articles also are based on a live coding presentation given by C++ Expert Tomasz Kamiński at our local Cracow C++ User Group.
Below, you can find the GoodReads page for the book with the readers' feedback:
I'm a beginner in C++? Is that book for me?
The book assumes that you have a basic knowledge of C++. I suggest taking some elementary course first.
I'm an expert, and I know everything about C++? Is that book for me?
Yeah... you know all about C++? Is this possible? :)
Anyway, in your case, the book will give you a good refresher and even will show you some new tricks.
I'm not a beginner nor an expert...?
Perfect! So the book will show you lots of examples that will expand your knowledge and also remind you things that you may already know.
Additionally, throughout the book, you'll see other techniques and features related to modern C++ like, `constexpr`, exceptions, fold expressions, `std::thread`, perfect forwarding using callable objects and many more.
Is this a historical book with lots of boring descriptions?
The flow of the book focuses on the background behind lambda expression and its evolution. But it's meant to teach you practical things. You'll learn the lambdas step by step, understanding new capabilities that lambdas got with each C++ revision.
Will I get free updates?
Yes! While the book is 100% ready, I might add some more updates in the future, mainly bug fixes.
That's why it's best to by the book as early as possible; for example, the earliest version of the book was completely free.
The content looks like copied directly from the blog, so what's the point to buy it?
The very early version of the book was adapted directly from the blog... but then most of the content was rewritten and heavily updated. Now, you get at least 4x of what's available on the blog, not to mention the better quality and a nice looking pdf/ebook (there's no need to click and jump between separate blog articles).
On the Internet there's lot's of free content about lambdas, so why buy the book?
Sure! Even on my blog, you can find lots of articles about lambda expression. The C++ draft is also free, so you can read the specification on your own. Or have an additional explanation from great cppreference pages.
But the book will save you lots of your precious time looking for those quality content, extra examples, extended descriptions. What's more, by having a nice learning flow, you can understand this powerful C++ feature much faster at a super low price.
Is there a refund option?
Yes! if you buy the Book through Leanpub, then you have a 45-day guarantee. (Not applicable with Kindle direct Publishing though).
You can also download a preview with almost 60 pages.
Did I miss something?
If you have more questions, then please ask directly and write at bartlomiej DOT filipek AT bfilipek.com.
C++ Software Developer, San Diego
Just like in his previous book and his blog, Bartłomiej explains very well the details of lambda basics, the usage of lambda in your C++ code and goes all the way to the expert domain of this topic. Great read and very comprehensive (e)book to keep on your desk.
This is a great piece of work, stuffed with details and practical examples, and very easy to read. A must-read to know how to make the most of lambdas in your C++ code.
About the Book
- Roots Of The Book
- Who This Book is For
- Reader Feedback
- Code License
Formatting And Special Sections
- Syntax Highlighting Limitations
- Special Sections
- Online Compilers
- About the Author
- Revision History
1. Lambdas in C++98/03
Callable Objects in C++98/03
- What is a “Functor”?
- Issues with Function Object Class Types
- Composing With Functional Helpers
- Motivation for a New Feature
- Callable Objects in C++98/03
2. Lambdas in C++11
The Syntax of Lambda Expression
- A Few Examples of Lambda Expressions:
- Compiler Expansion
The Type of a Lambda Expression
- Constructors and Copying
The Call Operator
- Other Modifiers
- Generated Code
- Capture All or Explicit?
- Invocation Counter - An Example of Captured Variables
- Capturing Global Variables
- Capturing Statics
Capturing a Class Member And the
- Moveable-only Objects
- Preserving Const
- Capturing a Parameter Pack
- Trailing Return Type Syntax
Conversion to a Function Pointer
- A Tricky Case
IIFE - Immediately Invoked Functional Expression
- One Note About the Readability
- Inheriting from a Lambda
- Storing Lambdas in a Container
- The Syntax of Lambda Expression
3. Lambdas in C++14
- Default Parameters for Lambdas
- Return Type
Captures With an Initialiser
- Improvements for Existing Issues
- Variadic Generic Arguments
- Perfect Forwarding with Generic Lambdas
- Deducing the Correct Type
- Using Modern C++ Techniques
- Function Composition
- LIFTing with lambdas
- Internal Lambda and a Generic Parameter
- More Tricks
- Is recursive lambda the best alternative?
4. Lambdas in C++17
- Lambda Syntax Update
- Exception Specification in the Type System
- Capturing Variables
- Some Guides
- Updates To IIFE
- Updates to Variadic Generic Lambdas
Deriving from Multiple Lambdas
- Custom Template Argument Deduction Rules
- Extension to Aggregate Initialisation
Concurrent Execution Using Lambdas
- Lambdas and Parallel Algorithms from C++17
- Lambdas And Async - Wrap Up
- Lambdas with
5. Lambdas in C++20
- Lambda Syntax Update
- A Quick Overview of the Changes
- Capturing a Parameter Pack
- Template Lambdas
- Concepts and Lambdas
Changes to Stateless Lambdas
- Even more with unevaluated contexts
- C++20 Updates to the Overloaded Pattern
- Appendix A - List of Techniques
Appendix B - Top Five Advantages of C++ Lambda Expressions
- 1. Lambdas Make Code More Readable
- 2. Lambdas Improve Locality of the Code
- 3. Lambdas Allow Storing State Easily
- 4. Lambdas Allow Several Overloads in the Same Place
- 5. Lambdas Get Better with Each Revision of C++!
The Leanpub 45-day 100% Happiness Guarantee
Within 45 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
C++ Best PracticesJason Turner
Level up your C++, get the tools working for you, eliminate common problems, and move on to more exciting things!
Functional Design and ArchitectureAlexander Granin
Software Design in Functional Programming, Design Patterns and Practices, Methodologies and Application Architectures. How to build real software in Haskell with less efforts and low risks. The first complete source of knowledge.
OpenIntro StatisticsDavid Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntro
A complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
R Programming for Data ScienceRoger D. Peng
This book brings the fundamentals of R programming to you, using the same material developed as part of the industry-leading Johns Hopkins Data Science Specialization. The skills taught in this book will lay the foundation for you to begin your journey learning data science. Printed copies of this book are available through Lulu.
C++20 is the next big C++ standard after C++11. As C++11 did it, C++20 changes the way we program modern C++. This change is, in particular, due to the big four of C++20: ranges, coroutines, concepts, and modules.
I am a Software Engineer and I am in ChargeAlexis Monville and Michael Doyle
I am a Software Engineer and I am in Charge is a real-world, practical book that helps you increase your impact and satisfaction at work no matter who you work with.
In the book, we will follow Sandrine, a fictional character who learns to think in a new way enabling her to take a different course of action.
Invest In Digital Health - The Medical Futurist's GuideDr. Bertalan Mesko
Artificial Intelligence and Digital Health are booming. In this book, we explain why now it's a good time to invest in Digital Health and give recommendations on where to invest by looking at the top 24 technological trends we find the most promising.
Atomic KotlinBruce Eckel and Svetlana Isakova
For both beginning and experienced programmers! From the author of the multi-award-winning Thinking in C++ and Thinking in Java together with a member of the Kotlin language team comes a book that breaks the concepts into small, easy-to-digest "atoms," along with exercises supported by hints and solutions directly inside IntelliJ IDEA!
The Hundred-Page Machine Learning BookAndriy Burkov
Everything you really need to know in Machine Learning in a hundred pages.
Mastering STM32Carmine Noviello
With more than 600 microcontrollers, STM32 is probably the most complete ARM Cortex-M platform on the market. This book aims to be the first guide around that introduces the reader to this exciting MCU portfolio from ST Microelectronics and its official CubeHAL.
Software Architecture for Developers: Volumes 1 & 2 - Technical leadership and communication
2 Books"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before...
The Future of Digital Health
6 BooksWe put together the most popular books from The Medical Futurist to provide a clear picture about the major trends shaping the future of medicine and healthcare. Digital health technologies, artificial intelligence, the future of 20 medical specialties, big pharma, data privacy and how technology giants such as Amazon or Google want to conquer...
Cisco CCNA 200-301 Complet
4 BooksCe lot comprend les quatre volumes du guide préparation à l'examen de certification Cisco CCNA 200-301.
CCDE Practical Studies (All labs)
3 BooksCCDE lab
"The C++ Standard Library" and "Concurrency with Modern C++"
2 BooksGet my books "The C++ Standard Library" and "Concurrency with Modern C++" in a bundle. The first book gives you the details you should know about the C++ standard library; the second one dives deeper into concurrency with modern C++. In sum, you get more than 600 pages full of modern C++ and about 250 source files presenting the standard library...
Modern Management Made Easy
3 BooksRead all three Modern Management Made Easy books. Learn to manage yourself, lead and serve others, and lead the organization.
Programming with Ease
3 BooksAlle drei Bände der Serie Programming with Ease in einem Paket. Darin findest du alles, was ich dir zu den wichtigsten Phasen der Softwareentwicklung im Hinblick auf Clean Code Development für langfristig hohe Produktivität sagen kann.Im Band Slicing findest du die Anforderungsanalyse im Rahmen eines iterativ-inkrementellen Vorgehensmodells aus...
2 BooksUnveil the power of Ansible and Vagrant with this bundle at a special price. You'll have everything you need to get started with Vagrant - learn the basics and how to create your virtual development environments, using Ansible as provisioner! About Vagrant Cookbook Vagrant Cookbook is a complete guide to get started with Vagrant and create your...
2 BooksDocker and Kubernetes are taking the world by storm! These books will get you up-to-speed fast! Docker Deep Dive is over 400 pages long, and covers all objectives on the Docker Certified Associate exam.The Kubernetes Book includes everything you need to get up and running with Kubernetes!
Growing Agile: The Complete Coach's Guide
7 BooksGrowing Agile: Coach's Guide Series This bundle provides a collection of training and workshop plans for a variety of agile topics. The series is aimed at agile coaches, trainers and ScrumMasters who often find themselves needing to help teams understand agile concepts. Each book in the series provides the plans, slides, handouts and activity...