Book Image

Mastering Rust. - Second Edition

By : Rahul Sharma
Book Image

Mastering Rust. - Second Edition

By: Rahul Sharma

Overview of this book

Rust is an empowering language that provides a rare combination of safety, speed, and zero-cost abstractions. Mastering Rust – Second Edition is filled with clear and simple explanations of the language features along with real-world examples, showing you how you can build robust, scalable, and reliable programs. This second edition of the book improves upon the previous one and touches on all aspects that make Rust a great language. We have included the features from latest Rust 2018 edition such as the new module system, the smarter compiler, helpful error messages, and the stable procedural macros. You’ll learn how Rust can be used for systems programming, network programming, and even on the web. You’ll also learn techniques such as writing memory-safe code, building idiomatic Rust libraries, writing efficient asynchronous networking code, and advanced macros. The book contains a mix of theory and hands-on tasks so you acquire the skills as well as the knowledge, and it also provides exercises to hammer the concepts in. After reading this book, you will be able to implement Rust for your enterprise projects, write better tests and documentation, design for performance, and write idiomatic Rust code.
Table of Contents (19 chapters)

Derive macros

We already saw that we can write #[derive(Copy, Debug)] on any struct, enum, or union type to get the Copy and Debug traits implemented for it, but this auto-derive feature is limited only to a few built-in traits in the compiler. With derive macros or macros 1.1, you get the ability to derive your own custom trait on any struct or enum or union type, thereby reducing the amount of boilerplate code that you would have written by hand. This may seem like a niche use case, but it is the most used procedural macro form, which high performance crates such as serde and diesel use. The derive macros only apply to data types such as structs, enums, or unions. Creating a custom derive macro for implementing a trait on a type requires the following steps:

  1. First, you need your type and the trait that you want to implement on the type. These can come from any crate, either...