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)

Panicking responsibly

Sometimes, there is no way for an execution thread to continue. This may be due to things such as invalid configuration files, unresponsive peers or servers, or OS-related errors. Rust has many ways to panic, explicitly or implicitly. The most ubiquitous one is probably unwrap() for multiple Option types and related types, which panic on error or None. Yet, for more complex programs, it is essential to take control of the panicking (for example, by avoiding multiple unwrap() calls and libraries that use it) and the panic! macro supports that.

How to do it...

Let's examine how we can take control of multiple panic! instances:

  1. Create a new project with cargo new panicking-responsibly --lib and open...