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)

Error Handling

In this chapter, we'll take a look at how fallible and unexpected situations are handled in Rust, gain an understanding of the error handling with errors as types, and look at how to design interfaces that compose well with error types. We aim to cover the first two error scenarios as they are under our control and languages generally provide mechanisms for handling these errors. If fatal errors occur, our program gets aborted by the operating system kernel and so we don't have much control over them.

In this chapter, we will cover the following topics:

  • Error handling prelude
  • Recovering from errors using the Option and Result types
  • Combinator methods for Option and Result
  • Propagating errors
  • Non-recoverable errors
  • Custom errors and the Error trait