extern crate regex;
extern crate nix;
use std::{fmt, error, io, convert, num};
#[derive(Debug)]
pub enum IPTError {
Io(io::Error),
Regex(regex::Error),
Nix(nix::Error),
Parse(num::ParseIntError),
Other(&'static str),
}
pub type IPTResult<T> = Result<T, IPTError>;
impl fmt::Display for IPTError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
IPTError::Io(ref err) => write!(f, "{}", err),
IPTError::Regex(ref err) => write!(f, "{}", err),
IPTError::Nix(ref err) => write!(f, "{}", err),
IPTError::Parse(ref err) => write!(f, "{}", err),
IPTError::Other(ref message) => write!(f, "{}", message),
}
}
}
impl error::Error for IPTError {
fn description(&self) -> &str {
match *self {
IPTError::Io(ref err) => err.description(),
IPTError::Regex(ref err) => err.description(),
IPTError::Nix(ref err) => err.description(),
IPTError::Parse(ref err) => err.description(),
IPTError::Other(ref message) => message,
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
IPTError::Io(ref err) => Some(err),
IPTError::Regex(ref err) => Some(err),
IPTError::Nix(ref err) => Some(err),
IPTError::Parse(ref err) => Some(err),
_ => Some(self),
}
}
}
impl convert::From<io::Error> for IPTError {
fn from(err: io::Error) -> Self {
IPTError::Io(err)
}
}
impl convert::From<regex::Error> for IPTError {
fn from(err: regex::Error) -> Self {
IPTError::Regex(err)
}
}
impl convert::From<nix::Error> for IPTError {
fn from(err: nix::Error) -> Self {
IPTError::Nix(err)
}
}
impl convert::From<num::ParseIntError> for IPTError {
fn from(err: num::ParseIntError) -> Self {
IPTError::Parse(err)
}
}
impl convert::From<&'static str> for IPTError {
fn from(err: &'static str) -> Self {
IPTError::Other(err)
}
}