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)


There are some seemingly reasonable things we might try to do with pattern matching that don't work as we might expect. We're going to take a look at those, and work out what they're actually doing and why Rust works that way.

Not all values can be matched against a literal pattern

In all of our examples so far, when we matched DemoStruct in a pattern, we matched probability to a variable or to _. That's because probability is a floating point number, which means that two values that are functionally identical might not compare as exactly equal.

If we try to use a floating-point literal in a pattern (in Rust 1.29), we see a warning like this:

It's just a warning but, as the warning says,...