src/doc/book/2018-edition/src/ch19-00-advanced-features.md

   1 # Advanced Features
   2
   3 By now, you’ve learned the most commonly used parts of the Rust programming
   4 language. Before we do one more project in Chapter 20, we’ll look at a few
   5 aspects of the language you might run into every once in a while. You can use
   6 this chapter as a reference for when you encounter any unknowns when using
   7 Rust. The features you’ll learn to use in this chapter are useful in very
   8 specific situations. Although you might not reach for them often, we want to
   9 make sure you have a grasp of all the features Rust has to offer.
  10
  11 In this chapter, we’ll cover:
  12
  13 * Unsafe Rust: How to opt out of some of Rust’s guarantees and take
  14   responsibility for manually upholding those guarantees
  15 * Advanced lifetimes: Syntax for complex lifetime situations
  16 * Advanced traits: Associated types, default type parameters, fully qualified
  17   syntax, supertraits, and the newtype pattern in relation to traits
  18 * Advanced types: More about the newtype pattern, type aliases, the *never*
  19   type, and dynamically sized types
  20 * Advanced functions and closures: Function pointers and returning closures
  21
  22 It’s a panoply of Rust features with something for everyone! Let’s dive in!