Book Image

Mastering Rust - Second Edition

By : Rahul Sharma, Vesa Kaihlavirta
Book Image

Mastering Rust - Second Edition

By: Rahul Sharma, Vesa Kaihlavirta

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 prelude

"From then on, when anything went wrong with a computer, we said it had bugs in it."

- Grace Hopper

Writing programs that behave well under expected conditions is a good start. It's when a program encounters unexpected situations where it gets really challenging. Proper error handling is an important but often overlooked practice in software development. Most error handling, in general, falls into three categories:

  • Recoverable errors that are expected to happen due to the user and the environment interacting with the program, for example, a file not found error or a number parse error.
  • Non-recoverable errors that violate the contracts or invariants of the program, for example, index out of bounds or divide by zero.
  • Fatal errors that abort the program immediately. Such situations include running out of memory, and stack overflow.