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
Copyright
About Packt
Contributors
Preface
12
Math Problems
13
Language Features
14
Strings and Regular Expressions
15
Streams and Filesystems
16
Date and Time
17
Algorithms and Data Structures
Index

Using structured bindings to handle multi-return values


Returning multiple values from a function is something very common, yet there is no first-class solution in C++ to enable it directly. Developers have to choose between returning multiple values through reference parameters to a function, defining a structure to contain the multiple values or returning a std::pair or std::tuple. The first two use named variables that have the advantage that they clearly indicate the meaning of the return value, but have the disadvantage that they have to be explicitly defined. std::pair has its members called first and second, and std::tuple has unnamed members that can only be retrieved with a function call, but can be copied to named variables using std::tie(). None of these solutions is ideal.

C++17 extends the semantic use of std::tie() into a first-class core language feature that enables unpacking the values of a tuple to named variables. This feature is called structured bindings.

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