Design Patterns and Best Practices in Rust

This repository contains the code examples for the book "Design Patterns and Best Practices in Rust" by Evan Williams.

Repository Structure

The repository is organized by chapter, with each chapter's examples in its corresponding directory:

• ch1 - Why is Rust Different?
• ch2 - Anti-Pattern: Designing for Object Orientation
• ch3 - Anti-Pattern: Using Clone & Rc Everywhere
• ch4 - Don't Fight the Borrow Checker
• ch5-ch8 - Correct Calculator Project
  • ch5 - Creational Patterns: Making Things
  • ch6 - Structural Patterns: Connecting & Aggregating
  • ch7 - Behavioural Patterns 1: Taking Action
  • ch8 - Behavioural Patterns 2: Keeping Track
• ch9 - Architectural Patterns
• ch10 - Patterns that Leverage the Type System
• ch11 - Patterns from Functional Programming
• ch12 - Patterns that Use Unique Rust Features
• ch13 - Leaning into Rust

The Correct Calculator Project

The "Correct Calculator" is a project that spans chapters 5-8, demonstrating how to apply various design patterns in Rust. The project evolves across these chapters:

• Chapter 5 (Creational Patterns): Sets up the basic structure and implements patterns for creating objects
• Chapter 6 (Structural Patterns): Enhances the calculator with patterns for organizing code structure
• Chapter 7 (Behavioral Patterns 1): Implements patterns for command processing and actions
• Chapter 8 (Behavioral Patterns 2): Completes the calculator with state management and optimization

To build any chapter's version of the calculator:

cd ch5/correct-calculator  # or ch6, ch7, ch8
cargo build
cargo run

Each chapter builds on the previous one, adding new features while demonstrating new patterns.

Requirements

• Rust 1.78.0 or newer
• Cargo (included with Rust)

License

This project is licensed under the terms specified in the LICENSE file.