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use std::{convert::Infallible, error::Error as StdError, fmt::Display};
use crate::io::Id;
#[derive(Debug)]
pub enum Error {
Protocol(ProtocolError),
Io(std::io::Error),
Serialize(Option<bincode::Error>),
Driver,
Spawner,
Other(Box<dyn StdError + Send + Sync + 'static>),
Unspecified,
}
impl Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Error::Protocol(e) => {
write!(f, "protocol error: {}", e)
}
Error::Io(e) => {
write!(f, "io error: {}", e)
}
Error::Serialize(e) => {
write!(f, "serialize error: ")?;
if let Some(e) = e {
write!(f, "{}", e)
} else {
write!(f, "internal error")
}
}
Error::Driver => {
write!(f, "driver stopped unexpectedly")
}
Error::Spawner => {
write!(f, "spawner stopped unexpectedly")
}
Error::Other(e) => {
write!(f, "other error: {}", e)
}
Error::Unspecified => {
write!(f, "unspecified error")
}
}
}
}
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
match self {
Error::Io(e) => Some(e),
Error::Serialize(e) => e.as_ref().map(|e| e.as_ref() as &(dyn StdError + 'static)),
Error::Other(e) => Some(e.as_ref() as &(dyn StdError + 'static)),
_ => None,
}
}
}
impl From<std::io::Error> for Error {
fn from(e: std::io::Error) -> Self {
Self::Io(e)
}
}
impl From<Infallible> for Error {
fn from(_: Infallible) -> Self {
unreachable!()
}
}
impl<E: std::error::Error + Sync + Send + 'static> From<Box<E>> for Error {
fn from(e: Box<E>) -> Self {
Self::Other(e)
}
}
#[derive(Debug)]
pub enum ProtocolError {
MartianResponse,
ResponseMismatch(Id),
}
impl Display for ProtocolError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
ProtocolError::MartianResponse => {
write!(f, "response of non-exist request")
}
ProtocolError::ResponseMismatch(_) => {
write!(f, "response for different function")
}
}
}
}
impl StdError for ProtocolError {}
impl From<ProtocolError> for Error {
fn from(e: ProtocolError) -> Self {
Self::Protocol(e)
}
}
pub type Result<T> = std::result::Result<T, Error>;