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use std::{io, fmt, error};
#[derive(Debug)]
pub enum RTDError {
Io(io::Error),
SerdeJson(serde_json::Error),
Custom(&'static str),
}
pub type RTDResult<T> = Result<T, RTDError>;
impl RTDError {
pub fn custom(msg: &'static str) -> Self { RTDError::Custom(msg) }
}
impl fmt::Display for RTDError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
RTDError::Io(ref err) => write!(f, "IO error: {}", err),
RTDError::SerdeJson(ref err) => write!(f, "Serde json error: {}", err),
RTDError::Custom(msg) => write!(f, "{}", msg),
}
}
}
impl error::Error for RTDError {
fn description(&self) -> &str {
match *self {
RTDError::Io(ref err) => err.description(),
RTDError::SerdeJson(ref err) => err.description(),
RTDError::Custom(msg) => msg,
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
RTDError::Io(ref err) => Some(err),
RTDError::SerdeJson(ref err) => Some(err),
RTDError::Custom(_) => None
}
}
}
impl From<io::Error> for RTDError {
fn from(err: io::Error) -> RTDError {
RTDError::Io(err)
}
}
impl From<serde_json::Error> for RTDError {
fn from(err: serde_json::Error) -> RTDError {
RTDError::SerdeJson(err)
}
}