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)

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The box() method for returning futures does cause an additional allocation to the heap. Another method of returning futures relies on using a nightly version of Rust or for this issue to be resolved. The new async_add_points() method would return an implied Future trait and would look as follows:

fn async_add_points<F>(f: F, player: &mut Player, points: u32) -> impl Future<Item = Player, Error = F::Error>
where F: Future<Item = Player>,
// Presuming that player.add_points() will send the points to a
// database/server over a network and returns
// an updated player score from the server/database.
let _ = player.add_points(points).flatten();

// Additionally, we may want to add logging mechanisms, friend
notifications, etc. here.


Rust may cause undefined behavior if we were to call poll() more than once for a future. This problem...