use std::convert::From;
use std::error;
use std::fmt;
use std::io;
use std::result;
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug)]
pub struct Error {
error_kind: ErrorKind,
}
#[derive(Debug)]
pub enum ErrorKind {
Xdg(XdgError),
Io(io::Error)
}
#[derive(Debug)]
pub enum XdgError {
NoHomeDir,
InvalidPath,
IncorrectPermissions,
IncorrectOwner,
}
impl Error {
pub fn new(error_kind: ErrorKind) -> Error {
Error { error_kind: error_kind }
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.error_kind {
ErrorKind::Xdg(ref e) => write!(f, "Xdg error: {:?}", e),
ErrorKind::Io(ref e) => e.fmt(f),
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match self.error_kind {
ErrorKind::Xdg(_) => "Xdg error",
ErrorKind::Io(ref e) => e.description(),
}
}
}
impl From<XdgError> for Error {
fn from(error: XdgError) -> Error {
Error { error_kind: ErrorKind::Xdg(error) }
}
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Error {
Error { error_kind: ErrorKind::Io(error) }
}
}
impl From<XdgError> for Result<()> {
fn from(error: XdgError) -> Result<()> {
Err(Error::from(error))
}
}