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

Replacing the content of a string using regular expressions


In the last two recipes, we have looked at how to match a regular expression on a string or a part of a string and iterate through matches and submatches. The regular expression library also supports text replacement based on regular expressions. In this recipe, we will see how to use std::regex_replace() to perform such text transformations.

Getting ready

For general information about regular expressions support in C++11, refer to the Verifying the format of a string using regular expressions recipe.

How to do it...

In order to perform text transformations using regular expressions, you should perform the following:

  1. Include the <regex> and <string> and the namespace std::string_literals for C++14 standard user defined literals for strings:
        #include <regex> 
        #include <string> 
        using namespace std::string_literals;
  1. Use the std::regex_replace() algorithm with a replacement string as the third...