Echo Writes Code

errors.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
use errno::{ Errno };

use std::error::{ self };
use std::fmt::{ self };
use std::io::{ self };

pub type Result<T> = ::std::result::Result<T, Error>;

#[derive(Debug)]
pub enum Error {
	AlreadyLocked,
	FromStdIo(io::Error),
	LockFailed(Errno),
}

impl From<io::Error> for Error {
	fn from(e: io::Error) -> Error {
		Error::FromStdIo(e)
	}
}

impl fmt::Display for Error {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		use Error::*;

		match *self {
			AlreadyLocked => write!(f, "Already locked"),
			FromStdIo(ref e) => write!(f, "IO error: {}", e),
			LockFailed(e) => write!(f, "Locking failed: {}", e),
		}
	}
}

impl error::Error for Error {}