rsddns/src/config/error.rs

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

#[derive(Debug)]
pub struct ConfigError {
    description: String,
    original_error: Option<Box<Error>>,
}

impl ConfigError {
    pub fn new(description: &str, original_error: Option<Box<Error>>) -> ConfigError {
        ConfigError {
            description: String::from(description),
            original_error,
        }
    }
}

impl Error for ConfigError {}

impl fmt::Display for ConfigError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match &self.original_error {
            Some(original_error) => {
                write!(f, "{}: \"{}\"", self.description, original_error)
            }
            None => write!(f, "{}", self.description)
        }
    }
}