Book Image

Rust Standard Library Cookbook

By : Jan Hohenheim, Daniel Durante
Book Image

Rust Standard Library Cookbook

By: Jan Hohenheim, Daniel Durante

Overview of this book

Mozilla’s Rust is gaining much attention with amazing features and a powerful library. This book will take you through varied recipes to teach you how to leverage the Standard library to implement efficient solutions. The book begins with a brief look at the basic modules of the Standard library and collections. From here, the recipes will cover packages that support file/directory handling and interaction through parsing. You will learn about packages related to advanced data structures, error handling, and networking. You will also learn to work with futures and experimental nightly features. The book also covers the most relevant external crates in Rust. By the end of the book, you will be proficient at using the Rust Standard library.
Table of Contents (12 chapters)

There's more...

When reading a malformed protocol, we reuse io::ErrorKind to show what exactly went wrong. In the recipes of Chapter 6, Handling Errors, you will learn how to provide your own error to better separate your areas of failure. If you want, you could read them now and then return here to improve our code.

The errors that need to be pushed into an own variant are:
  • InvalidStart
  • InvalidEndianness
  • UnexpectedEndOfPayload

Another improvement to the code would be to put all of our strings, namely MyProtocol, LE, and BE, into their own constants, as in the following line:

const PROTOCOL_START: &[u8] = b"MyProtocol";

The provided code in this recipe and some others doesn't use many constants, as they proved to be somewhat harder to understand in printed form. In real code bases, however, be sure to always put strings that you find yourself copy-pasting into own constants!