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  • Book Overview & Buying C++ Fundamentals [Instructor Edition]
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C++ Fundamentals [Instructor Edition]

C++ Fundamentals [Instructor Edition]

By : Francesco Zoffoli, Antonio Mallia
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C++ Fundamentals [Instructor Edition]

C++ Fundamentals [Instructor Edition]

By: Francesco Zoffoli, Antonio Mallia

Overview of this book

C++ Fundamentals begins by introducing you to the C++ syntax. You will study the semantics of variables along with their advantages and trade-offs, and see how they can be best used to write safe and efficient code. With the help of this book, you’ll be able to compile fully working C++ programs and understand how variables, references, and pointers can be used to manipulate the state of the program. You will then explore functions and classes — the features that C++ offers to organize a program — and use them to solve more complex problems such as functions and classes. You’ll also understand common pitfalls and modern best practices, especially the ones that diverge from the C++98 guideline. As you advance through the chapters, you’ll study the advantages of generic programming and write your own templates to make generic algorithms that work with any type. This C++ book will guide you in fully exploiting standard containers and understanding how to pick the appropriate container for each problem. You will even work with a variety of memory management tools in C++. By the end of this book, you will not only be able to write efficient code, but also be equipped to improve the readability, performance, and maintainability of your programs using standard algorithms.
Table of Contents (9 chapters)
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C++ Fundamentals
Preface

std::variant


variant is a value type that's used to represent a choice of types. The class takes a list of types, and the variant will be able to contain one value of any of those types.

It is often referred to as tagged union, because similar to a union, it can store multiple types, with only one present at a time. It also keeps track of which type is currently stored.

During the execution of a program, variant will contain exactly one of the possible types at a time.

Like optional, variant is a value type: when we create a copy of variant, the element that is currently stored is copied into the new variant.

To interact with std::variant, the C++ standard library gives us two main functions:

  • holds_alternative<Type>(variant): It returns true if the variant is currently holding the provided type, if not then false.

  • get(variant): There are two versions: get<Type>(variant) and get<Index>(variant).

get<Type>(variant) gets the value of the type that's currently stored inside...

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C++ Fundamentals [Instructor Edition]
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