IntoInnerError in std::io - Rust (original) (raw)
Struct IntoInnerError
1.0.0 · Source
pub struct IntoInnerError<W>(/* private fields */);Expand description
An error returned by BufWriter::into_inner which combines an error that happened while writing out the buffer, and the buffered writer object which may be used to recover from the condition.
§Examples
use std::io::BufWriter;
use std:🥅:TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError
panic!("An error occurred");
}
};1.0.0 · Source
Returns the error which caused the call to BufWriter::into_inner()to fail.
This error was returned when attempting to write the internal buffer.
§Examples
use std::io::BufWriter;
use std:🥅:TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError, let's log the inner error.
//
// We'll just 'log' to stdout for this example.
println!("{}", e.error());
panic!("An unexpected error occurred.");
}
};1.0.0 · Source
Returns the buffered writer instance which generated the error.
The returned object can be used for error recovery, such as re-inspecting the buffer.
§Examples
use std::io::BufWriter;
use std:🥅:TcpStream;
let mut stream = BufWriter::new(TcpStream::connect("127.0.0.1:34254").unwrap());
// do stuff with the stream
// we want to get our `TcpStream` back, so let's try:
let stream = match stream.into_inner() {
Ok(s) => s,
Err(e) => {
// Here, e is an IntoInnerError, let's re-examine the buffer:
let buffer = e.into_inner();
// do stuff to try to recover
// afterwards, let's just return the stream
buffer.into_inner().unwrap()
}
};1.55.0 · Source
Consumes the IntoInnerError and returns the error which caused the call toBufWriter::into_inner() to fail. Unlike error, this can be used to obtain ownership of the underlying error.
§Example
use std::io::{BufWriter, ErrorKind, Write};
let mut not_enough_space = [0u8; 10];
let mut stream = BufWriter::new(not_enough_space.as_mut());
write!(stream, "this cannot be actually written").unwrap();
let into_inner_err = stream.into_inner().expect_err("now we discover it's too small");
let err = into_inner_err.into_error();
assert_eq!(err.kind(), ErrorKind::WriteZero);1.55.0 · Source
Consumes the IntoInnerError and returns the error which caused the call toBufWriter::into_inner() to fail, and the underlying writer.
This can be used to simply obtain ownership of the underlying error; it can also be used for advanced error recovery.
§Example
use std::io::{BufWriter, ErrorKind, Write};
let mut not_enough_space = [0u8; 10];
let mut stream = BufWriter::new(not_enough_space.as_mut());
write!(stream, "this cannot be actually written").unwrap();
let into_inner_err = stream.into_inner().expect_err("now we discover it's too small");
let (err, recovered_writer) = into_inner_err.into_parts();
assert_eq!(err.kind(), ErrorKind::WriteZero);
assert_eq!(recovered_writer.buffer(), b"t be actually written");👎Deprecated since 1.42.0: use the Display impl or to_string()
Returns the lower-level source of this error, if any. Read more
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type-based access to context intended for error reports. Read more
Converts to this type from the input type.