use std::fmt;
use std::io;
use std::str::Utf8Error;
#[derive(Debug)]
pub enum Error {
Io(io::Error),
EOL,
Utf8(Utf8Error),
Malformed(String),
Unexpected(String),
}
pub type Result<T> = ::std::result::Result<T, Error>;
pub type ResultPos<T> = ::std::result::Result<T, (Error, usize)>;
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Io(ref err) => write!(f, "{}", err),
Error::Utf8(ref err) => write!(f, "{}", err),
Error::EOL => write!(f, "Trying to access column but found End Of Line"),
Error::Malformed(ref err) => write!(f, "Malformed xml: {}", err),
Error::Unexpected(ref err) => write!(f, "Unexpected error: {}", err),
}
}
}
impl ::std::error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Io(..) => "IO error",
Error::Utf8(..) => "Error while converting to utf8",
Error::EOL => "Trying to access column but found End Of Line",
Error::Malformed(..) => "Xml is malformed",
Error::Unexpected(..) => "An unexpected error has occured",
}
}
fn cause(&self) -> Option<&::std::error::Error> {
match *self {
Error::Io(ref err) => Some(err),
Error::Utf8(ref err) => Some(err),
_ => None,
}
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error { Error::Io(err) }
}
impl From<Utf8Error> for Error {
fn from(err: Utf8Error) -> Error { Error::Utf8(err) }
}