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extern crate memcache;

use std::error;
use std::error::Error as _StdError;
use std::fmt;

/// A unified enum of errors by memcache::Connection
#[derive(Debug)]
pub enum Error {
    /// A memcache::MemcacheError
    Other(memcache::MemcacheError),
}

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

impl error::Error for Error {
    fn description(&self) -> &str {
        match *self {
            Error::Other(ref err) => err.description(),
        }
    }

    fn cause(&self) -> Option<&error::Error> {
        match *self {
            Error::Other(ref err) => err.cause(),
        }
    }
}