How to Implement the std

:error::Error Trait

Error Handling

2026-04-17T12:05:42+00:00

Implement std::error::Error by defining a struct and adding Display and Error trait implementations.

Implement std::error::Error by defining a struct and implementing the trait with a Display implementation for the error message.

use std::error::Error;
use std::fmt;

#[derive(Debug)]
struct MyError {
    msg: String,
}

impl fmt::Display for MyError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}", self.msg)
    }
}

impl Error for MyError {}