Struct serde::lib::core::io::IntoInnerError

1.0.0 · source ·
pub struct IntoInnerError<W>(W, Error);
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");
    }
};

Tuple Fields

0: W1: Error

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()
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)
Provides type based access to context intended for error reports. Read more
Converts to this type from the input type.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

🔬This is a nightly-only experimental API. (provide_any)
Data providers should implement this method to provide all values they are able to provide by using demand. Read more
Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.