Struct otter_nodejs_tests::otter_support::imports::io::IntoInnerError

1.0.0 · source · [−]
pub struct IntoInnerError<W>(_, _);
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::net::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");
    }
};

Implementations

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::net::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.");
    }
};

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::net::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()
    }
};

Consumes the IntoInnerError and returns the error which caused the call to BufWriter::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);

Consumes the IntoInnerError and returns the error which caused the call to BufWriter::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");

Trait Implementations

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

Read more

The lower-level source of this error, if any. Read more

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred. Read more

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

Converts to this type from the input type.

Auto Trait Implementations

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self

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