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use std::error::Error as StdError;
use std::fmt;
use std::io::Error as IoError;
use openssl::ssl::error::SslError;
use protobuf::ProtobufError;
use serde_json::error::Error as SerializationError;
#[derive(Debug)]
pub enum Error {
Internal(String),
Io(IoError),
Protobuf(ProtobufError),
Serialization(SerializationError),
Ssl(SslError)
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Internal(ref message) => f.write_str(message),
Error::Io(ref err) => err.fmt(f),
Error::Protobuf(ref err) => err.fmt(f),
Error::Serialization(ref err) => err.fmt(f),
Error::Ssl(ref err) => err.fmt(f),
}
}
}
impl StdError for Error {
fn description(&self) -> &str {
match *self {
Error::Internal(ref message) => message,
Error::Io(ref err) => err.description(),
Error::Protobuf(ref err) => err.description(),
Error::Serialization(ref err) => err.description(),
Error::Ssl(ref err) => err.description(),
}
}
fn cause(&self) -> Option<&StdError> {
match *self {
Error::Io(ref err) => Some(err),
Error::Protobuf(ref err) => Some(err),
Error::Ssl(ref err) => Some(err),
Error::Serialization(ref err) => Some(err),
Error::Internal(_) => None,
}
}
}
impl From<IoError> for Error {
fn from(err: IoError) -> Error {
Error::Io(err)
}
}
impl From<ProtobufError> for Error {
fn from(err: ProtobufError) -> Error {
Error::Protobuf(err)
}
}
impl From<SerializationError> for Error {
fn from(err: SerializationError) -> Error {
Error::Serialization(err)
}
}
impl From<SslError> for Error {
fn from(err: SslError) -> Error {
Error::Ssl(err)
}
}