Book Image

Modern C++ Programming Cookbook - Second Edition

By : Marius Bancila
5 (1)
Book Image

Modern C++ Programming Cookbook - Second Edition

5 (1)
By: Marius Bancila

Overview of this book

C++ has come a long way to be one of the most widely used general-purpose languages that is fast, efficient, and high-performance at its core. The updated second edition of Modern C++ Programming Cookbook addresses the latest features of C++20, such as modules, concepts, coroutines, and the many additions to the standard library, including ranges and text formatting. The book is organized in the form of practical recipes covering a wide range of problems faced by modern developers. The book also delves into the details of all the core concepts in modern C++ programming, such as functions and classes, iterators and algorithms, streams and the file system, threading and concurrency, smart pointers and move semantics, and many others. It goes into the performance aspects of programming in depth, teaching developers how to write fast and lean code with the help of best practices. Furthermore, the book explores useful patterns and delves into the implementation of many idioms, including pimpl, named parameter, and attorney-client, teaching techniques such as avoiding repetition with the factory pattern. There is also a chapter dedicated to unit testing, where you are introduced to three of the most widely used libraries for C++: Boost.Test, Google Test, and Catch2. By the end of the book, you will be able to effectively leverage the features and techniques of C++11/14/17/20 programming to enhance the performance, scalability, and efficiency of your applications.
Table of Contents (16 chapters)
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Using noexcept for functions that do not throw exceptions

Exception specification is a language feature that can enable performance improvements, but on the other hand, when done incorrectly, it can abnormally terminate the program. The exception specification from C++03, which allowed you to indicate what types of exceptions a function could throw, has been deprecated and replaced with the new C++11 noexcept specification. This specification only allows you to indicate that a function does not throw exceptions, but not the actual exceptions types that it throws. This recipe provides information about the modern exception specifications in C++, as well as guidelines on when to use them.

How to do it...

Use the following constructs to specify or query exception specifications:

  • Use nothrow in a function declaration to indicate that the function is not throwing any exception:
    void func_no_throw() noexcept
  • Use nothrow(expr) in a function declaration...