Design Patterns in Rust

The book "Design Patterns in Rust" is a practical guide that will help you master classic and modern design patterns in the context of the Rust language. Unlike traditional pattern books focused on object-oriented languages, this edition takes into account Rust's unique features: the ownership system, borrowing, lifetimes, as well as a powerful type system and functional capabilities.

What is this book about?

The book starts with the basics: you will learn how design patterns are transformed under the influence of Rust's strict type system and its memory model. Then three groups of patterns are discussed in detail:

• Creational Patterns — Builder, Factory Method, Abstract Factory, Singleton and their implementation with thread safety and Rust idioms in mind (e.g., OnceCell, lazy_static).
• Structural Patterns — Adapter, Bridge, Composite, Decorator, Facade, Flyweight, and Proxy. You will see how traits and generic programming replace classical inheritance and interfaces.
• Behavioral Patterns — Strategy, Observer, Command, Iterator, Mediator, Memento, State, Template Method, and Visitor. Special attention is given to functional alternatives: closures, iterators, channels, and sum types.

Who is this book for?

The book is intended for developers already familiar with the basics of Rust — syntax, type system, ownership, and borrowing. It will be useful both for those transitioning from other languages (C++, Java, Python) who want to understand how to apply familiar patterns in Rust, and for experienced Rust programmers seeking to structure large projects and write cleaner, more maintainable code.

What will you learn?

• How to adapt classic GoF patterns to the Rust paradigm without relying on OOP.
• How to use functional approaches (closures, function composition, iterators) to replace complex class hierarchies.
• How patterns help manage lifetimes, avoid data races, and achieve zero-cost abstractions.
• Real code examples: from building parsers to implementing game engines and network services.
• Performance comparison of different approaches and recommendations for choosing the optimal pattern for a specific task.

Why should you read it?

Rust is a language that encourages thoughtful architecture. This book does not just list patterns — it teaches you to think in Rust, leveraging its strengths: safety, fearless concurrency, and type expressiveness. You will get not dry theory, but ready-to-apply solutions that will make your code more reliable, faster, and easier to refactor.

Master the design patterns that work in Rust — and you will be able to create systems that are resilient to errors and ready for scaling.