If you're a C++ developer interested in using reactive programming to build asynchronous and concurrent applications, you'll find this book extremely useful. This book doesn't assume any previous knowledge of reactive programming.

Chapter 1, Reactive Programming Model – Overview and History, introduces some key data structures of the Rx programming model. It also covers GUI event handling, an overview of reactive programming, and an implementation of GUI versions of different interfaces on top of MFC.

Chapter 2, A Tour of Modern C++ and its Key Idioms, covers C++ features, type inference, variadic templates, rvalue references and move semantics, lambda functions, elementary functional programming, pipeable operators, and implementation of iterators and observers.

Chapter 3,  Language-Level Concurrency and Parallelism in C++, discusses the threading library available in the C++ standard. You will learn how to launch and manage a thread, and discuss different aspects of the threading library. This chapter lays a good foundation for concurrency support introduced in Modern C++.

Chapter 4, Asynchronous and Lock-Free Programming in C++, discusses the facilities provided by the standard library for writing task-based parallelism. It also discusses the new multithreading-aware memory model that is available with the Modern C++ language.

 Chapter 5, Introduction to Observables, talks about the GoF Observer pattern and explains its shortcomings. You will learn about the GoF Composite/Visitor pattern in the context of modeling an expression tree.

Chapter 6, Introduction to Event Stream Programming Using C++, focuses on the topic of event Stream programming. We will also look at the Streamulus library, which provides a DSEL approach to the manipulation of event Streams, followed by a couple of programs.

Chapter 7, Introduction to Data Flow Computation and the RxCpp Library, starts with a conceptual overview of the data flow computing paradigm and moves quickly to writing some basic RxCpp programs. You will learn about the set of operators supported by the RxCpp library.

Chapter 8,  RxCpp – the Key Elements, gives you an understanding of how pieces of the Rx programming model fit together. The chapter starts with Observables and moves on to cover the subscription mechanism and scheduler implementation.

Chapter 9, Reactive GUI Programming Using Qt/C++, deals with the topic of reactive GUI programming using Qt. You will learn about concepts in the Qt framework, such as the Qt object hierarchy, the meta-object system, and signals and slots. Then, you will write an application to handle mouse events and filter them. After this you will also learn advanced topic of how we can create custom reactive operators in RxCpp, should an existing set of operators not suffice for the purpose. This topic also helps you create composite operators by composing the existing operators. This topic is not present in the book, but it is available for download at https://www.packtpub.com/sites/default/files/downloads/Creating_Custom_Operators_in_RxCpp.pdf.

Chapter 10, Design Patterns and Idioms for C++ Rx Programming, delves into the wonderful world of design patterns and idioms. Starting with GOF design patterns, we will move on to reactive programming patterns.

Chapter 11, Reactive Microservices Using C++, covers how the Rx programming model can be used to write reactive microservices using C++. It introduces you to the Microsoft C++ REST SDK and its programming model.

Chapter 12, Advanced Streams and Handling Errors, discusses error handling in RxCpp, along with some of the advanced constructs and operators that handle Streams in the RxCpp library. We will discuss how to continue Streams when an error comes, how to wait for the producer of the Stream to correct the error and continue the sequence, and how to perform common operations that are applicable to both success and error paths.

In order to follow the topics in this book, you need to have a knowledge of C++ programming.

/* close connection to server */
XCloseDisplay(display);

return 0;
}

/* close connection to server */
XCloseDisplay(display);

return 0;
}

$ mkdir css
$ cd css

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