Book Image

Modern C++: Efficient and Scalable Application Development

By : Richard Grimes, Marius Bancila
Book Image

Modern C++: Efficient and Scalable Application Development

By: Richard Grimes, Marius Bancila

Overview of this book

C++ is one of the most widely used programming languages. It is fast, flexible, and used to solve many programming problems. This Learning Path gives you an in-depth and hands-on experience of working with C++, using the latest recipes and understanding most recent developments. You will explore C++ programming constructs by learning about language structures, functions, and classes, which will help you identify the execution flow through code. You will also understand the importance of the C++ standard library as well as memory allocation for writing better and faster programs. Modern C++: Efficient and Scalable Application Development deals with the challenges faced with advanced C++ programming. You will work through advanced topics such as multithreading, networking, concurrency, lambda expressions, and many more recipes. By the end of this Learning Path, you will have all the skills to become a master C++ programmer. This Learning Path includes content from the following Packt products: • Beginning C++ Programming by Richard Grimes • Modern C++ Programming Cookbook by Marius Bancila • The Modern C++ Challenge by Marius Bancila
Table of Contents (24 chapters)
Title Page
About Packt
Math Problems
Language Features
Strings and Regular Expressions
Streams and Filesystems
Date and Time
Algorithms and Data Structures

Using override and final for virtual methods

Unlike other similar programming languages, C++ does not have a specific syntax for declaring interfaces (that are basically classes with pure virtual methods only) and also has some deficiencies related to how virtual methods are declared. In C++, the virtual methods are introduced with the virtual keyword. However, the keyword virtual is optional for declaring overrides in derived classes that can lead to confusion when dealing with large classes or hierarchies. You may need to navigate throughout the hierarchy up to the base to figure out whether a function is virtual or not. On the other hand, sometimes, it is useful to make sure that a virtual function or even a derived class can no longer be overridden or derived further. In this recipe, we will see how to use C++11 special identifiers override and final to declare virtual functions or classes.


Getting ready

You should be familiar with inheritance and polymorphism in C++ and concepts, such...