This book explains the concept of “editions”, major new eras in Rust's development. You can read the book online.
The Rust Edition Guide is dual licensed under MIT/Apache2, just like Rust itself. See the LICENSE-* files in this repository for more details.
You can also build the book and read it locally if you'd like.
Building the book requires mdBook 0.5. To get it:
$ cargo install mdbook@^0.5
The most straight-forward way to build and view the book locally is to use the following command:
$ mdbook serve --open
This builds the HTML version of the book, starts a webserver at http://localhost:3000, and opens your default web browser. It will also automatically rebuild the book whenever the source changes, and the page should automatically reload.
To run the tests:
$ mdbook test