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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
use std::string::FromUtf8Error;
use std::error;
use std::io;
use std::fmt;
use std::result;
#[derive(Debug)]
pub enum Error {
Other(String),
Io(io::Error),
FromUtf8(FromUtf8Error),
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Other(ref s) => s,
Error::Io(ref error) => error::Error::description(error),
Error::FromUtf8(ref error) => error.description(),
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::Io(ref error) => Some(error),
Error::FromUtf8(ref error) => Some(error),
_ => None,
}
}
}
impl From<io::Error> for Error {
fn from(error: io::Error) -> Error {
Error::Io(error)
}
}
impl From<FromUtf8Error> for Error {
fn from(error: FromUtf8Error) -> Error {
Error::FromUtf8(error)
}
}
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
match *self {
Error::Other(ref s) => {
write!(fmt, "Error:{}", s)
}
Error::Io(ref error) => fmt::Display::fmt(error, fmt),
Error::FromUtf8(ref error) => fmt::Display::fmt(error, fmt),
}
}
}
pub type Result<T> = result::Result<T, Error>;
pub fn str_error<T>(s:String) -> Result<T> {
Err(Error::Other(s))
}