pub trait FromIo<T> {
// Required method
fn map_err_context(self, context: impl FnOnce() -> String) -> T;
}Expand description
Enables the conversion from std::io::Error to UError and from std::io::Result to
UResult.
Required Methods§
Sourcefn map_err_context(self, context: impl FnOnce() -> String) -> T
fn map_err_context(self, context: impl FnOnce() -> String) -> T
Map the error context of an std::io::Error or std::io::Result to a custom error
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.
Implementations on Foreign Types§
Source§impl<T> FromIo<Result<T, Box<dyn UError>>> for Result<T, Error>
Available on Unix only.Enables the conversion from Result<T, nix::Error> to UResult<T>.
impl<T> FromIo<Result<T, Box<dyn UError>>> for Result<T, Error>
Available on Unix only.
Enables the conversion from Result<T, nix::Error> to UResult<T>.
§Examples
use uucore::error::FromIo;
use nix::errno::Errno;
let nix_err = Err::<(), nix::Error>(Errno::EACCES);
let uio_result = nix_err.map_err_context(|| String::from("fix me please!"));
// prints "fix me please!: Permission denied"
println!("{}", uio_result.unwrap_err());