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C++20 STL Cookbook

You're reading from   C++20 STL Cookbook Leverage the latest features of the STL to solve real-world problems

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Product type Paperback
Published in May 2022
Publisher Packt
ISBN-13 9781803248714
Length 450 pages
Edition 1st Edition
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Author (1):
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Bill Weinman Bill Weinman
Author Profile Icon Bill Weinman
Bill Weinman
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Table of Contents (13) Chapters Close

Preface 1. Chaper 1: New C++20 Features 2. Chapter 2: General STL Features FREE CHAPTER 3. Chapter 3: STL Containers 4. Chapter 4: Compatible Iterators 5. Chapter 5: Lambda Expressions 6. Chapter 6: STL Algorithms 7. Chapter 7: Strings, Streams, and Formatting 8. Chapter 8: Utility Classes 9. Chapter 9: Concurrency and Parallelism 10. Chapter 10: Using the File System 11. Chapter 11: A Few More Ideas 12. Other Books You May Enjoy

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...

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