Introduction

So, you're coming from C++ and want to write Rust? Great!

You have questions? We have answers.

This book is a collection of frequently asked questions for those arriving from existing C++ codebases. It guides you on how to adapt your C++ thinking to the new facilities available in Rust. It should help you if you're coming from other object-oriented languages such as Java too.

Although it's structured as questions and answers, it can also be read front-to-back, to give you hints about how to adapt your C++/Java thinking to a more idiomatically Rusty approach.

It does not aim to teach you Rust - there are many better resources. It doesn't aim to talk about Rust idioms in general - there are great existing guides for that. This guide is specifically about transitioning from some other traditionally OO language. If you're coming from such a language, you'll have questions about how to achieve the same outcomes in idiomatic Rust. That's what this guide is for.

Structure

The guide starts with idioms at the small scale - answering questions about how you'd write a few lines of code - and moves towards ever larger patterns - answering questions about how you'd structure your whole codebase.

Contributors

The following awesome people helped write the answers here, and they're sometimes quoted using the abbreviations given.

Thanks to Alyssa Haroldsen (@kupiakos) (AH), Augie Fackler (AF), David Tolnay (@davidtolnay) (DT), Łukasz Anforowicz (LA), Manish Goregaokar (@ManishEarth) (MG), Mike Forster (MF), Miguel Young de la Sota (@DrawsMiguel) (MY), and Tyler Mandry (@tmandry) (TM).

Their views have been edited and collated by Adrian Taylor (@adehohum), danakj@chromium.org and Martin Brænne. Any errors or misrepresentations are ours.

Licensed under either of Apache License, Version 2.0 or MIT license at your option.