Struct std::io::Stderr

[+] Show type declaration

pub struct Stderr { /* fields omitted */ }

[−] Expand description

A handle to the standard error stream of a process.

For more information, see the io::stderr method.

Methods

impl Stderr

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Important traits for StderrLock<'a>

impl<'a> Write for StderrLock<'a>

pub fn lock(&self) -> StderrLock

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Locks this handle to the standard error stream, returning a writable guard.

The lock is released when the returned lock goes out of scope. The returned guard also implements the Write trait for writing data.

Examples

use std::io::{self, Write};

fn foo() -> io::Result<()> {
    let stderr = io::stderr();
    let mut handle = stderr.lock();

    handle.write(b"hello world")?;

    Ok(())
}

Trait Implementations

impl Debug for Stderr

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fn fmt(&self, f: &mut Formatter) -> Result

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Formats the value using the given formatter.

impl Write for Stderr

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fn write(&mut self, buf: &[u8]) -> Result<usize>

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Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

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Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<()>

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Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, args: Arguments) -> Result<()>

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Writes a formatted string into this writer, returning any error encountered.

Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W

fn by_ref(&mut self) -> &mut Self where     Self: Sized,

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Creates a "by reference" adaptor for this instance of Write.

impl AsRawFd for Stderr

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fn as_raw_fd(&self) -> RawFd

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This is supported on Unix only.

Extracts the raw file descriptor.

impl AsRawHandle for Stderr

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fn as_raw_handle(&self) -> RawHandle

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This is supported on Windows only.

Extracts the raw handle, without taking any ownership.