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use std::fmt;
use std::io;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ErrorKind {
Io(io::ErrorKind),
Serialize,
Deserialize,
}
#[derive(Debug)]
pub struct Error {
kind: ErrorKind,
inner: ErrorInner,
}
#[derive(Debug)]
enum ErrorInner {
Io(io::Error),
Other(String),
}
impl Error {
pub(crate) fn deserialize<S: Into<String>>(message: S) -> Error {
Error {
kind: ErrorKind::Deserialize,
inner: ErrorInner::Other(message.into()),
}
}
pub fn kind(&self) -> ErrorKind {
self.kind
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self.inner {
ErrorInner::Io(ref err) => write!(f, "i/o error: {}", err),
ErrorInner::Other(ref msg) => {
write!(f, "{}: {}", ::std::error::Error::description(self), msg)
}
}
}
}
impl ::std::error::Error for Error {
fn description(&self) -> &str {
match self.kind {
ErrorKind::Io(_) => "i/o error",
ErrorKind::Serialize => "serialize error",
ErrorKind::Deserialize => "deserialize error",
}
}
}
impl ::serde::de::Error for Error {
fn custom<T: fmt::Display>(msg: T) -> Error {
Error {
kind: ErrorKind::Deserialize,
inner: ErrorInner::Other(msg.to_string()),
}
}
}
impl ::serde::ser::Error for Error {
fn custom<T: fmt::Display>(msg: T) -> Error {
Error {
kind: ErrorKind::Serialize,
inner: ErrorInner::Other(msg.to_string()),
}
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error {
kind: ErrorKind::Io(err.kind()),
inner: ErrorInner::Io(err),
}
}
}