Book Image

Modern C++ Programming Cookbook

By : Marius Bancila
Book Image

Modern C++ Programming Cookbook

By: Marius Bancila

Overview of this book

C++ is one of the most widely used programming languages. Fast, efficient, and flexible, it is used to solve many problems. The latest versions of C++ have seen programmers change the way they code, giving up on the old-fashioned C-style programming and adopting modern C++ instead. Beginning with the modern language features, each recipe addresses a specific problem, with a discussion that explains the solution and offers insight into how it works. You will learn major concepts about the core programming language as well as common tasks faced while building a wide variety of software. You will learn about concepts such as concurrency, performance, meta-programming, lambda expressions, regular expressions, testing, and many more in the form of recipes. These recipes will ensure you can make your applications robust and fast. By the end of the book, you will understand the newer aspects of C++11/14/17 and will be able to overcome tasks that are time-consuming or would break your stride while developing.
Table of Contents (19 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Performing compile-time assertion checks with static_assert


In C++, it is possible to perform both runtime and compile-time assertion checks to ensure that specific conditions in your code are true. Runtime assertions have the disadvantage that they are verified late when the program is running, and only if the control flow reaches them. There is no alternative when the condition depends on runtime data; however, when that is not the case, compile-time assertion checks are to be preferred. With compile-time assertions, the compiler is able to notify you early in the development stage with an error that a particular condition is not met. These, however, can only be used when the condition can be evaluated at compile time. In C++11, compile-time assertions are performed with static_assert.

Getting ready

The most common use of static assertion checks is with template metaprogramming, where they can be used for validating that preconditions on template types are met (examples can include whether...