Book Image

Rust Programming Cookbook

By : Claus Matzinger
Book Image

Rust Programming Cookbook

By: Claus Matzinger

Overview of this book

Rust 2018, Rust's first major milestone since version 1.0, brings more advancement in the Rust language. The Rust Programming Cookbook is a practical guide to help you overcome challenges when writing Rust code. This Rust book covers recipes for configuring Rust for different environments and architectural designs, and provides solutions to practical problems. It will also take you through Rust's core concepts, enabling you to create efficient, high-performance applications that use features such as zero-cost abstractions and improved memory management. As you progress, you'll delve into more advanced topics, including channels and actors, for building scalable, production-grade applications, and even get to grips with error handling, macros, and modularization to write maintainable code. You will then learn how to overcome common roadblocks when using Rust for systems programming, IoT, web development, and network programming. Finally, you'll discover what Rust 2018 has to offer for embedded programmers. By the end of the book, you'll have learned how to build fast and safe applications and services using Rust.
Table of Contents (12 chapters)

Building custom macros in Rust

Previously, we have mostly used predefined macros—it's now time to look at creating custom macros. There are several types of macros in Rust—derive-based, function-like, and attributes, all of which have their own respective use cases. In this recipe, we'll experiment with the function-like variety to get started.

How to do it...

You are only a few steps from creating macros:

  1. Run cargo new custom-macros in Terminal (or PowerShell on Windows) and open the directory with Visual Studio Code.
  2. Open src/main.rs in the editor. Let's create a new macro called one_plus_one at the top of the file:
// A simple macro without arguments
macro_rules! one_plus_one {
() =&gt...