| % Borrow and AsRef |
| |
| <small>There is a new edition of the book and this is an old link.</small> |
| |
| > A cheap reference-to-reference conversion. |
| > Used to convert a value to a reference value within generic code. |
| |
| ```rust |
| fn is_hello<T: AsRef<str>>(s: T) { |
| assert_eq!("hello", s.as_ref()); |
| } |
| ``` |
| |
| --- |
| |
| This chapter does not exist in [the second edition][2]. |
| The best place to learn more about this is [the Rust documentation][3]. |
| |
| * **[In the Rust documentation: `convert::AsRef`][3]** |
| * <small>[In the first edition: Ch 4.10 — Borrow and AsRef][1]</small> |
| |
| |
| [1]: https://doc.rust-lang.org/1.30.0/book/first-edition/borrow-and-asref.html |
| [2]: index.html |
| [3]: ../std/convert/trait.AsRef.html |
