Rust Programming Cookbook

How to do it...

Let's pull in some external crates to handle errors better in just a few steps:

1. Create a new project with cargo new external-crates and open it with VS Code.
2. Edit Cargo.toml to add the quick-error dependency:

[dependencies]quick-error = "1.2"

3. To use the provided macros in quick-error, we need to import them explicitly. Add the following use statements to src/main.rs:

#[macro_use] extern crate quick_error;use std::convert::From;use std::io;

4. In one step, we are then going to add all of the errors we want to declare inside the quick_error! macro:

quick_error! {    #[derive(Debug)]    pub enum ErrorWrapper {        InvalidDeviceIdError(device_id: usize) {            from(device_id: usize) -> (device_id) description("No device present with this ...