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)

Returning abstract types

Remember when we used Box to create trait objects in order to hide the exact implementation returned, and instead only give guarantees about implemented traits? That required us to accept some overhead, as a Box allocates its resources on the heap; however, on the current nightly, things are different. You can use the impl trait syntax introduced in this recipe to return objects as their trait directly on the stack, all without boxes. At the moment, this only works for returned types, but the syntax is planned to be extended to most places where you could write a concrete type.