Book Image

C++20 STL Cookbook

By : Bill Weinman
Book Image

C++20 STL Cookbook

By: Bill Weinman

Overview of this book

Fast, efficient, and flexible, the C++ programming language has come a long way and is used in every area of the industry to solve many problems. The latest version C++20 will see programmers change the way they code as it brings a whole array of features enabling the quick deployment of applications. This book will get you up and running with using the STL in the best way possible. Beginning with new language features in C++20, this book will help you understand the language's mechanics and library features and offer insights into how they work. Unlike other books, the C++20 STL Cookbook takes an implementation-specific, problem-solution approach that will help you overcome hurdles quickly. You'll learn core STL concepts, such as containers, algorithms, utility classes, lambda expressions, iterators, and more, while working on real-world recipes. This book is a reference guide for using the C++ STL with its latest capabilities and exploring the cutting-edge features in functional programming and lambda expressions. By the end of the book C++20 book, you'll be able to leverage the latest C++ features and save time and effort while solving tasks elegantly using the STL.
Table of Contents (13 chapters)

Manage allocated memory with std::unique_ptr

Smart pointers are an excellent tool for managing allocated heap memory.

Heap memory is managed at the lowest level by the C functions, malloc() and free(). malloc() allocates a block of memory from the heap, and free() returns it to the heap. These functions do not perform initialization and do not call constructors or destructors. If you fail to return allocated memory to the heap with a call to free(), the behavior is undefined and often leads to memory leaks and security vulnerabilities.

C++ provides the new and delete operators to allocate and free heap memory, in place of malloc() and free(). The new and delete operators call object constructors and destructors but still do not manage memory. If you allocate memory with new and fail to free it with delete, you will leak memory.

Introduced with C++14, smart pointers comply with the Resource Acquisition Is Initialization (RAII) idiom. This means that when memory is allocated...