Book Image

Rust Quick Start Guide

By : Daniel Arbuckle
Book Image

Rust Quick Start Guide

By: Daniel Arbuckle

Overview of this book

Rust is an emerging programming language applicable to areas such as embedded programming, network programming, system programming, and web development. This book will take you from the basics of Rust to a point where your code compiles and does what you intend it to do! This book starts with an introduction to Rust and how to get set for programming, including the rustup and cargo tools for managing a Rust installation and development work?ow. Then you'll learn about the fundamentals of structuring a Rust program, such as functions, mutability, data structures, implementing behavior for types, and many more. You will also learn about concepts that Rust handles differently from most other languages. After understanding the Basics of Rust programming, you will learn about the core ideas, such as variable ownership, scope, lifetime, and borrowing. After these key ideas, you will explore making decisions in Rust based on data types by learning about match and if let expressions. After that, you'll work with different data types in Rust, and learn about memory management and smart pointers.
Table of Contents (10 chapters)

Cell and RefCell

Rust's rule that only one block of code can have write access to a data value at any one time is a good one, but sometimes the restrictions that are needed to be sure when the compiler is running that this rule will always be followed are too tight. Sometimes, we need the extra freedom that comes from having the rule checked while the program is running, instead.

The compiler checks would ensure that the program can't break the rule, while the runtime checks ensure that the program doesn't break the rule, giving us more flexibility at the cost of some overhead.

To support this option, Rust provides us with the Cell and RefCell data types, which are smart pointers that allow us to change their contents, even if they are not stored in a mutable variable.