1use std::path::PathBuf;
2use std::{error, fmt, io};
3
4#[derive(Debug)]
5struct PathError {
6 path: PathBuf,
7 err: io::Error,
8}
9
10impl fmt::Display for PathError {
11 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
12 write!(f, "{} at path {:?}", self.err, self.path)
13 }
14}
15
16impl error::Error for PathError {
17 fn source(&self) -> Option<&(dyn error::Error + 'static)> {
18 self.err.source()
19 }
20}
21
22pub(crate) trait IoResultExt<T> {
23 fn with_err_path<F, P>(self, path: F) -> Self
24 where
25 F: FnOnce() -> P,
26 P: Into<PathBuf>;
27}
28
29impl<T> IoResultExt<T> for Result<T, io::Error> {
30 fn with_err_path<F, P>(self, path: F) -> Self
31 where
32 F: FnOnce() -> P,
33 P: Into<PathBuf>,
34 {
35 self.map_err(|e: Error| {
36 io::Error::new(
37 e.kind(),
38 error:PathError {
39 path: path().into(),
40 err: e,
41 },
42 )
43 })
44 }
45}
46