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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
use std;
use std::str;
use std::io;
use std::fmt;
use std::string;
use std::error;
use serde_json;
pub type Result<T> = std::result::Result<T, Error>;
#[derive(Debug)]
pub enum Error {
Io(io::Error),
Utf8(str::Utf8Error),
BadJson(serde_json::Error),
VlqLeftover,
VlqNoValues,
VlqOverflow,
BadSegmentSize(u32),
BadSourceReference(u32),
BadNameReference(u32),
IndexedSourcemap,
RegularSourcemap,
InvalidDataUrl,
CannotFlatten(String),
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::Io(err)
}
}
impl From<string::FromUtf8Error> for Error {
fn from(err: string::FromUtf8Error) -> Error {
From::from(err.utf8_error())
}
}
impl From<str::Utf8Error> for Error {
fn from(err: str::Utf8Error) -> Error {
Error::Utf8(err)
}
}
impl From<serde_json::Error> for Error {
fn from(err: serde_json::Error) -> Error {
Error::BadJson(err)
}
}
impl error::Error for Error {
fn description(&self) -> &str {
use Error::*;
match *self {
Io(ref err) => err.description(),
Utf8(ref err) => err.description(),
BadJson(ref err) => err.description(),
VlqLeftover => "vlq leftover",
VlqNoValues => "no vlq values",
VlqOverflow => "overflow in vlq",
BadSegmentSize(_) => "bad segment size",
BadSourceReference(_) => "bad source reference",
BadNameReference(_) => "bad name reference",
IndexedSourcemap => "unexpected indexed sourcemap",
RegularSourcemap => "unexpected sourcemap",
InvalidDataUrl => "invalid data URL",
CannotFlatten(_) => "cannot flatten the given indexed sourcemap",
}
}
fn cause(&self) -> Option<&error::Error> {
use Error::*;
match *self {
Io(ref err) => Some(&*err),
Utf8(ref err) => Some(&*err),
_ => None,
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use Error::*;
match *self {
Io(ref msg) => write!(f, "{}", msg),
Utf8(ref msg) => write!(f, "{}", msg),
BadJson(ref err) => write!(f, "bad json: {}", err),
VlqLeftover => write!(f, "leftover cur/shift in vlq decode"),
VlqNoValues => write!(f, "vlq decode did not produce any values"),
VlqOverflow => write!(f, "vlq decode caused an overflow"),
BadSegmentSize(size) => write!(f, "got {} segments, expected 4 or 5", size),
BadSourceReference(id) => write!(f, "bad reference to source #{}", id),
BadNameReference(id) => write!(f, "bad reference to name #{}", id),
IndexedSourcemap => write!(f, "encountered unexpected indexed sourcemap"),
RegularSourcemap => {
write!(f,
"encountered unexpected sourcemap where index was expected")
}
InvalidDataUrl => write!(f, "the provided data URL is invalid"),
CannotFlatten(ref msg) => write!(f, "cannot flatten the indexed sourcemap: {}", msg),
}
}
}