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use self::Error::*;
use std::error::Error as StdError;
use std::fmt::{self, Display, Formatter};
use std::io;
#[derive(Debug)]
pub enum Error {
Client(&'static str),
Io(io::Error),
}
impl Display for Error {
fn fmt(&self, fmt: &mut Formatter) -> Result<(), fmt::Error> {
fmt.write_str(self.description())
}
}
impl StdError for Error {
fn description(&self) -> &str {
match *self {
Client(err) => err,
Io(ref err) => err.description(),
}
}
fn cause(&self) -> Option<&StdError> {
match *self {
Io(ref err) => Some(&*err),
_ => None,
}
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Io(err)
}
}
impl From<&'static str> for Error {
fn from(string: &'static str) -> Error {
Client(string)
}
}
pub type SendmailResult = Result<(), Error>;