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
|
#[derive(Clone, Debug)]
pub struct Error {
inner: String,
backtrace: Option<Backtrace>,
}
impl Error {
pub fn new(inner: impl std::fmt::Display) -> Self {
Self::with_string(inner.to_string())
}
fn with_string(inner: String) -> Self {
Self {
inner,
backtrace: Backtrace::new(),
}
}
}
impl PartialEq for Error {
fn eq(&self, other: &Self) -> bool {
self.inner == other.inner
}
}
impl Eq for Error {}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
writeln!(f, "{}", self.inner)?;
if let Some(backtrace) = self.backtrace.as_ref() {
writeln!(f)?;
writeln!(f, "Backtrace:")?;
writeln!(f, "{}", backtrace)?;
}
Ok(())
}
}
impl std::error::Error for Error {}
impl<'s> From<&'s str> for Error {
fn from(other: &'s str) -> Self {
Self::with_string(other.to_owned())
}
}
impl<'s> From<&'s String> for Error {
fn from(other: &'s String) -> Self {
Self::with_string(other.clone())
}
}
impl From<String> for Error {
fn from(other: String) -> Self {
Self::with_string(other)
}
}
#[cfg(feature = "debug")]
#[derive(Debug, Clone)]
struct Backtrace(backtrace::Backtrace);
#[cfg(feature = "debug")]
impl Backtrace {
fn new() -> Option<Self> {
Some(Self(backtrace::Backtrace::new()))
}
}
#[cfg(feature = "debug")]
impl std::fmt::Display for Backtrace {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
// `backtrace::Backtrace` uses `Debug` instead of `Display`
write!(f, "{:?}", self.0)
}
}
#[cfg(not(feature = "debug"))]
#[derive(Debug, Copy, Clone)]
struct Backtrace;
#[cfg(not(feature = "debug"))]
impl Backtrace {
fn new() -> Option<Self> {
None
}
}
#[cfg(not(feature = "debug"))]
impl std::fmt::Display for Backtrace {
fn fmt(&self, _: &mut std::fmt::Formatter) -> std::fmt::Result {
Ok(())
}
}
|
