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
65
66
67
68
69
70
71
72
73
74
75
76
use std::error;
use std::fmt;
use std::io;
use std::result;
use std::str::Utf8Error;
use std::string::FromUtf8Error;
use serde::{de, ser};
#[derive(Debug)]
pub enum Error {
Io(io::Error),
Encoding(Utf8Error),
Unknown(String),
Unsupported(&'static str),
}
pub type Result<T> = result::Result<T, Error>;
impl fmt::Display for Error {
fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Io(ref err) => err.fmt(fmt),
Error::Encoding(ref err) => err.fmt(fmt),
Error::Unknown(ref msg) => msg.fmt(fmt),
Error::Unsupported(ref msg) => msg.fmt(fmt),
}
}
}
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match *self {
Error::Io(ref err) => Some(err),
Error::Encoding(ref err) => Some(err),
Error::Unknown(_) => None,
Error::Unsupported(_) => None,
}
}
}
impl ser::Error for Error {
fn custom<T: fmt::Display>(msg: T) -> Self {
Error::Unknown(msg.to_string())
}
}
impl de::Error for Error {
fn custom<T: fmt::Display>(msg: T) -> Self {
Error::Unknown(msg.to_string())
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Self {
Error::Io(err)
}
}
impl From<Utf8Error> for Error {
fn from(err: Utf8Error) -> Self {
Error::Encoding(err)
}
}
impl From<FromUtf8Error> for Error {
fn from(err: FromUtf8Error) -> Self {
Error::Encoding(err.utf8_error())
}
}