Refactoring C++ Code: A Practical Guide

The book "Refactoring C++ Code" is a practical guide for developers striving to turn chaotic and hard-to-maintain C++ code into a clean, efficient, and scalable system. The author, Alexey Petrov, a Senior C++ developer with 15 years of experience, shares proven techniques that will help you not just "rewrite" but meaningfully improve existing code.

This book is not about C++ syntax from scratch. It is for those who already write in C++ and want to take their projects to the next level.

What you will learn from the book:

• Basic principles of refactoring: how to safely make changes without breaking functionality.
• Working with inheritance and polymorphism: replacing deep hierarchies with composition, eliminating "diamond inheritance."
• Memory management: refactoring raw pointers to smart pointers (std::unique_ptr, std::shared_ptr), eliminating leaks.
• Performance optimization: eliminating bottlenecks, working with the cache, profiling and refactoring "hot" sections.
• C++ antipatterns: recognizing and fixing "God Object," "Copy-Paste Programming," "Spaghetti Code," and others.
• Testing during refactoring: writing unit tests, using sanitizers and static analyzers to ensure correctness.
• Modern C++17/20 features: how to replace outdated constructs with std::optional, std::variant, concepts, and ranges.

Who this book is for:

• Junior and Middle developers who want to learn to write maintainable code and understand how to improve someone else's.
• Senior developers looking for systematic approaches to refactoring legacy projects.
• Team leads and architects responsible for codebase quality and code review processes.
• Everyone who works with C++ in game development, fintech, embedded systems, or high-load services.

The book contains over 50 real code examples (before and after refactoring), practical exercises, and checklists for independent work. Each chapter ends with a "Typical Mistakes" section — this will save you hours of debugging.

After reading, you will be able to:

• Perform refactoring without the fear of "breaking everything."
• Reduce the time to add new features by 2-3 times.
• Increase application performance by 20-40% through code optimization.
• Confidently pass code reviews and justify changes.

"Refactoring C++ Code" is not just a book, but a tool that will pay off from the very first applied tip. It is recommended to have a compiler with C++17 support and a basic knowledge of STL at hand.

Add this book to your library — and your code will become clean, fast, and reliable.