warp/
error.rs

1use std::convert::Infallible;
2use std::error::Error as StdError;
3use std::fmt;
4
5type BoxError = Box<dyn std::error::Error + Send + Sync>;
6
7/// Errors that can happen inside warp.
8pub struct Error {
9    inner: BoxError,
10}
11
12impl Error {
13    pub(crate) fn new<E: Into<BoxError>>(err: E) -> Error {
14        Error { inner: err.into() }
15    }
16}
17
18impl fmt::Debug for Error {
19    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
20        // Skip showing worthless `Error { .. }` wrapper.
21        fmt::Debug::fmt(&self.inner, f)
22    }
23}
24
25impl fmt::Display for Error {
26    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
27        fmt::Display::fmt(&self.inner, f)
28    }
29}
30
31impl StdError for Error {
32    fn source(&self) -> Option<&(dyn StdError + 'static)> {
33        Some(self.inner.as_ref())
34    }
35}
36
37impl From<Infallible> for Error {
38    fn from(infallible: Infallible) -> Error {
39        match infallible {}
40    }
41}
42
43#[test]
44fn error_size_of() {
45    assert_eq!(
46        ::std::mem::size_of::<Error>(),
47        ::std::mem::size_of::<usize>() * 2
48    );
49}
50
51#[test]
52fn error_source() {
53    let e = Error::new(std::fmt::Error {});
54    assert!(e.source().unwrap().is::<std::fmt::Error>());
55}
56
57macro_rules! unit_error {
58    (
59        $(#[$docs:meta])*
60        $pub:vis $typ:ident: $display:literal
61    ) => (
62        $(#[$docs])*
63        $pub struct $typ { _p: (), }
64
65        impl ::std::fmt::Debug for $typ {
66            fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
67                f.debug_struct(stringify!($typ)).finish()
68            }
69        }
70
71        impl ::std::fmt::Display for $typ {
72            fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
73                f.write_str($display)
74            }
75        }
76
77        impl ::std::error::Error for $typ {}
78    )
79}
warp/error.rs

warp/
error.rs
