| # Advanced Features |
| |
| By now, you’ve learned the most commonly used parts of the Rust programming |
| language. Before we do one more project in Chapter 21, we’ll look at a few |
| aspects of the language you might run into every once in a while, but may not |
| use every day. You can use this chapter as a reference for when you encounter |
| any unknowns. The features covered here are useful in very specific situations. |
| Although you might not reach for them often, we want to make sure you have a |
| grasp of all the features Rust has to offer. |
| |
| In this chapter, we’ll cover: |
| |
| * Unsafe Rust: how to opt out of some of Rust’s guarantees and take |
| responsibility for manually upholding those guarantees |
| * Advanced traits: associated types, default type parameters, fully qualified |
| syntax, supertraits, and the newtype pattern in relation to traits |
| * Advanced types: more about the newtype pattern, type aliases, the never type, |
| and dynamically sized types |
| * Advanced functions and closures: function pointers and returning closures |
| * Macros: ways to define code that defines more code at compile time |
| |
| It’s a panoply of Rust features with something for everyone! Let’s dive in! |
