std::io::Stderr - Rust
Description: API documentation for the Rust `Stderr` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, Stderr

# 1.0.0[−][src]Struct std::io::Stderr

    pub struct Stderr { /* fields omitted */ }

A handle to the standard error stream of a process.

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

## Methods

###

`impl Stderr`

[src]

####
ⓘImportant traits for StderrLock<'a>

### Important traits for StderrLock<'a>

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

`pub fn lock(&self) -> StderrLock`

[src]

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(())
    }Run

## Trait Implementations

###

`impl Write for Stderr`

[src]

####

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

[src]

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

####

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

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

####

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

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Attempts to write an entire buffer into this write. Read more

####

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

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

####
ⓘImportant traits for &'a mut I

### 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,`

[src]

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

###

`impl AsRawFd for Stderr`

1.21.0
[src]

####

`fn as_raw_fd(&self) -> RawFd`

[src]

This is supported on Unix only.

Extracts the raw file descriptor. Read more

###

`impl AsRawHandle for Stderr`

1.21.0
[src]

####

`fn as_raw_handle(&self) -> RawHandle`

[src]

This is supported on Windows only.

Extracts the raw handle, without taking any ownership.

###

`impl Debug for Stderr`

1.16.0
[src]

####

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

[src]

Formats the value using the given formatter. Read more

## Auto Trait Implementations

###

`impl Send for Stderr`

###

`impl Sync for Stderr`

## Blanket Implementations

###

`impl<T, U> TryFrom for T where T: From<U>,`

[src]

#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T> From for T`

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####

`fn from(t: T) -> T`

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Performs the conversion.

###

`impl<T, U> TryInto for T where U: TryFrom<T>,`

[src]

#### `type Error = <U as TryFrom<T>>::Error`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T, U> Into for T where U: From<T>,`

[src]

####

`fn into(self) -> U`

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Performs the conversion.

###

`impl<T> Borrow for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'a mut I

### 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 borrow(&self) -> &T`

[src]

Immutably borrows from an owned value. Read more

###

`impl<T> BorrowMut for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'a mut I

### 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 borrow_mut(&mut self) -> &mut T`

[src]

Mutably borrows from an owned value. Read more

###

`impl<T> Any for T where T: 'static + ?Sized,`

[src]

####

`fn get_type_id(&self) -> TypeId`

[src]

🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

Gets the `TypeId` of `self`. Read more

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