Design Patterns in Rust

Introduction

The book «Rust Design Patterns» (Brenden Matthews, 2020) is not just a collection of design patterns, but a deep dive into the philosophy of the Rust language. Unlike classic books on patterns (GoF), this work focuses on how to apply well-known solutions in the context of Rust's memory safety, ownership, and type system. The author does not retell the "Gang of Four," but shows which patterns become redundant or, conversely, take on new meaning thanks to Rust's capabilities.

What the book is about

The book consists of three parts. The first part introduces Rust idioms — small but important constructs that make code natural for the language. The second part covers classic creational, structural, and behavioral patterns adapted for Rust. The third part covers advanced topics: asynchrony, safety, and performance. Special attention is paid to how the ownership and borrowing system influences the choice of pattern.

Who this book is for

The book is intended for developers already familiar with the basics of Rust (syntax, ownership, lifetimes). It will be useful for:

• Those who want to write idiomatic Rust code, rather than transferring habits from C++/Java.
• Developers transitioning to Rust from other languages who want to understand how patterns "fit" into the type system.
• Engineers working on high-load systems where performance and safety are important.

What the reader will learn

After reading, the reader will be able to:

• Use Rust idioms: constructors, destructors, RAII, wrapper types.
• Implement creational patterns (Builder, Factory) with ownership in mind.
• Apply structural patterns (Adapter, Decorator, Proxy) without unnecessary cloning overhead.
• Work with behavioral patterns (Observer, Strategy, Command) in an asynchronous context.
• Avoid anti-patterns characteristic of Rust (e.g., excessive use of Rc/RefCell).
• Design safe and efficient APIs.

Strengths

The main advantage of the book is its practical focus. Each pattern is accompanied by a real code example that can be applied immediately. The author does not just list patterns, but explains why some of them look different in Rust. For example, the Visitor pattern in Rust is often implemented using enums and match, rather than double dispatch. The book also touches on topics rarely found in literature: safety in unsafe code, pin, and asynchronous patterns. The chapter on testing deserves special mention — the author shows how patterns help write testable code.

Who is recommended

The book will be useful for anyone who has already mastered Rust syntax and wants to move to the next level — writing clean, maintainable, and efficient code. It will also be an excellent supplement to the official documentation and the book "The Rust Programming Language." If you are developing libraries, frameworks, or embedded systems in Rust — this book is for you.