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)

Recoverable errors

As we have already said, the majority of error handling in Rust is done via two generic types, Option and Result. They act as wrapper types in the sense that it is recommended that APIs that can fail return the actual values by putting them inside these types. These types are built with a combination of enums and generics. As an enum, they get the ability to store a success state and an error state, while generics allow them to specialize at compile time so that they store any value in either state. These types also come with a lot of convenient methods (commonly known as combinators) implemented on them, allowing you to consume, compose, or transform the inner values easily. One thing to note about the Option and Result types is that they are ordinary types from the standard library in the sense that they aren't compiler built-ins that are treated differently...