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Add back links to the Rust Book

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I think it's important that we link the students to the full information about Unsafe Rust.
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Martin Geisler 2023-01-02 10:30:40 +01:00 committed by GitHub
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@ -6,13 +6,16 @@ The Rust language has two parts:
* **Unsafe Rust:** can trigger undefined behavior if preconditions are violated.
We will be seeing mostly safe Rust in this course, but it's important to know
what unsafe Rust is.
what Unsafe Rust is.
Unsafe Rust gives you access to five new capabilities:
* Dereference raw pointers.
* Access or modify mutable static variables.
* Access `union` fields.
* Call `unsafe` functions, including `extern` functions
* Call `unsafe` functions, including `extern` functions.
* Implement `unsafe` traits.
We will briefly cover these capabilities next. For full details, please see
[Chapter 19.1 in the Rust Book](https://doc.rust-lang.org/book/ch19-01-unsafe-rust.html)
and the [Rustonomicon](https://doc.rust-lang.org/nomicon/).