RustBrock/Advanced Features.md

Advanced Features

So far we learned about the most commonly used parts of the Rust programming language.

Here we will look at a few aspects of the language you may run into once in a while but may not use everyday.

This is intended to be used as a reference for when you encounter any unknowns.

The features covered here are useful in very specific situations.

In this chapter we will 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 new type 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 a