Refactoring C++ Code: A Practical Guide

The book "Refactoring C++ Code" is a practical guide for developers who want to learn how to systematically improve existing C++ code. Unlike abstract theories, the author offers specific techniques and step-by-step algorithms that can be applied directly in a working project.

What is this book about?

• Identifying and eliminating "code smells" in C++.
• Safe application of refactorings: from simple (rename, extract method) to complex (replace inheritance with delegation, refactoring templates).
• Working with legacy code: how to add tests, break dependencies, and simplify modules.
• Performance optimization without losing readability: profiling, replacing containers, memory management.
• Modern C++11/14/17/20 features: smart pointers, move semantics, lambdas, constexpr — how to use them for refactoring.
• Automation tools: clang-tidy, ReSharper C++, static analyzers.

Who is this book for?

• Junior and Middle developers — to stop being afraid of other people's code and learn how to improve it.
• Senior developers — to systematize knowledge and pass it on to the team.
• Team leads and architects — to introduce a culture of refactoring in the project.
• Students — to write quality code from the start, rather than having to relearn later.

What will you learn?

• How to safely refactor code without bugs (using tests and incremental changes).
• How to turn "spaghetti code" into a modular architecture.
• How to eliminate duplication, magic numbers, long functions, and large classes.
• How to properly work with inheritance, polymorphism, and templates.
• How to improve error handling and resource management.
• How to avoid overdoing it: when refactoring is harmful.

The book contains over 50 real-world C++ examples, ready to apply. Each refactoring is described using the scheme: "Problem → Solution → Example → Caveats." Special attention is paid to type safety, performance, and compatibility with C++ standards.

If you write in C++ and want your code to be reliable, fast, and understandable — this book is for you. It will become a desktop reference for any developer working with C++.