What are custom error types in Rust?

What are custom error types in Rust?

Custom error types in Rust allow you to define your own error handling mechanisms, making your code more robust.

How do I create a custom error type?

You can create a custom error type by defining a struct and implementing the std::fmt::Display and std::error::Error traits.

Can you show me an example?

Sure! Here's a simple example:

#[derive(Debug)]
struct MyError;

impl std::fmt::Display for MyError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "An error occurred")
    }
}

impl std::error::Error for MyError {}

What are the benefits of using custom error types?

They provide more context about errors, improve error handling, and can be used to categorize different error types.