January 2019
Beginner to intermediate
554 pages
13h 31m
English
Content preview from Mastering Rust - Second Edition
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Metaprogramming with Macros
Metaprogramming is a concept that changes the way you look at instructions and data in a program. It allows you to generate new code by treating instructions like any other piece of data. Many languages have support for metaprogramming, for example, Lisp's macros, C's #define construct, and Python's metaclasses. Rust is no different and provides many forms of metaprogramming, which we'll explore in this chapter.
In this chapter, we will look at the following topics:
- What is metaprogramming?
- Macros in Rust and their forms
- Declarative macros, macro variables, and types
- Repeating constructs
- Procedural macros
- Macro use case
- Available macro crates
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.