blob: 275001387d52b17575afadf27cf5ec7476c4d4f1 (
plain)
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
|
// Re-export the io::Result / Error types for convenience
pub use std::io::{Read, Write, Result, Error, ErrorKind};
// TODO: Delete this
/// A helper trait to provide the map_non_block function on Results.
pub trait MapNonBlock<T> {
/// Maps a `Result<T>` to a `Result<Option<T>>` by converting
/// operation-would-block errors into `Ok(None)`.
fn map_non_block(self) -> Result<Option<T>>;
}
impl<T> MapNonBlock<T> for Result<T> {
fn map_non_block(self) -> Result<Option<T>> {
use std::io::ErrorKind::WouldBlock;
match self {
Ok(value) => Ok(Some(value)),
Err(err) => {
if let WouldBlock = err.kind() {
Ok(None)
} else {
Err(err)
}
}
}
}
}
#[cfg(feature = "with-deprecated")]
pub mod deprecated {
/// Returns a std `WouldBlock` error without allocating
pub fn would_block() -> ::std::io::Error {
::std::io::ErrorKind::WouldBlock.into()
}
}
|
