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use std::{error, fmt, io, result};
use std::error::Error as E;
use chrono::format::ParseError;
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug)]
pub enum Error {
Parse(String),
Chrono(ParseError),
Io(io::Error),
Custom(Box<error::Error>),
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
fmt.write_str(self.description())
}
}
impl error::Error for Error {
fn description(&self) -> &str {
use self::Error::*;
match self {
&Parse(_) => "error while parsing",
&Chrono(_) => "error while parsing time strings",
&Io(_) => "error during input/output",
&Custom(ref e) => e.description(),
}
}
fn cause(&self) -> Option<&error::Error> {
use self::Error::*;
match self {
&Parse(ref _e) => None,
&Chrono(ref e) => Some(e),
&Io(ref e) => Some(e),
&Custom(ref e) => e.cause(),
}
}
}
impl From<ParseError> for Error {
fn from(err: ParseError) -> Error {
Error::Chrono(err)
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::Io(err)
}
}
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