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use self::Error::*;
use std::{
error::Error as StdError,
fmt::{self, Display, Formatter},
};
#[derive(Debug, Clone, Copy)]
pub enum Error {
MissingFrom,
MissingTo,
InvalidEmailAddress,
}
impl Display for Error {
fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), fmt::Error> {
fmt.write_str(&match *self {
MissingFrom => "missing source address, invalid envelope".to_owned(),
MissingTo => "missing destination address, invalid envelope".to_owned(),
InvalidEmailAddress => "invalid email address".to_owned(),
})
}
}
impl StdError for Error {
fn cause(&self) -> Option<&dyn StdError> {
None
}
}
pub type EmailResult<T> = Result<T, Error>;