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)

Handling multiple errors

Whenever an application becomes more complex and includes third-party frameworks, all kinds of error types need to be taken care of consistently without having a condition for each one. For example, a web service's large range of possible errors can bubble up to the handler where they need to be translated into HTTP codes with informative messages. These expected errors can range from parser errors to invalid authentication details, failed database connections, or an application-specific error with an error code. In this recipe, we'll cover how to deal with this variety of errors using wrappers.

How to do it...

Let's create an error wrapper in a few steps:

  1. Open the project you created...