Struct async_std::io::Stderr

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pub struct Stderr(_);

Expand description

A handle to the standard error of the current process.

This writer is created by the stderr function. See its documentation for more.

Note: Windows Portability Consideration

When operating in a console, the Windows implementation of this stream does not support non-UTF-8 byte sequences. Attempting to write bytes that are not valid UTF-8 will return an error.

Trait Implementations

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impl AsRawFd for Stderr

Available on Unix only.

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fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor. Read more

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impl AsRawHandle for Stderr

Available on Windows only.

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fn as_raw_handle(&self) -> RawHandle

Extracts the raw handle, without taking any ownership.

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impl AsyncWrite for Stderr

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fn poll_write(
 self: Pin<&mut Self>,
 cx: &mut Context<'_>,
 buf: &[u8]
) -> Poll<Result<usize>>

Attempt to write bytes from buf into the object. Read more

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fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

Attempt to flush the object, ensuring that any buffered data reach their destination. Read more

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fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

Attempt to close the object. Read more

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fn poll_write_vectored(
 self: Pin<&mut Self>,
 cx: &mut Context<'_>,
 bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>

Attempt to write bytes from bufs into the object using vectored IO operations. Read more

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impl Debug for Stderr

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl RefUnwindSafe for Stderr

impl Send for Stderr

impl Sync for Stderr

impl Unpin for Stderr

impl UnwindSafe for Stderr

Blanket Implementations

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<W> AsyncWriteExt for W where
W: AsyncWrite + ?Sized,

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fn write(&'a mut self, buf: &'a [u8]) -> WriteFuture<'a, Self>ⓘNotable traits for WriteFuture<'_, W>`impl<'_, W> Future for WriteFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

Writes some bytes into the byte stream. Read more

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fn write_vectored(
 &'a mut self,
 bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>ⓘNotable traits for WriteVectoredFuture<'_, W>`impl<'_, W> Future for WriteVectoredFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>;` where
 Self: Unpin,

Like write(), except that it writes a slice of buffers. Read more

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fn write_all(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self>ⓘNotable traits for WriteAllFuture<'_, W>`impl<'_, W> Future for WriteAllFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

Writes an entire buffer into the byte stream. Read more

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fn flush(&mut self) -> FlushFuture<'_, Self>ⓘNotable traits for FlushFuture<'_, W>`impl<'_, W> Future for FlushFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

Flushes the stream to ensure that all buffered contents reach their destination. Read more

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fn close(&mut self) -> CloseFuture<'_, Self>ⓘNotable traits for CloseFuture<'_, W>`impl<'_, W> Future for CloseFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

Closes the writer. Read more

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fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a, Global>>ⓘNotable traits for Pin`impl Future for Pin where P: DerefMut, ::Target: Future, type Output = <::Target as Future>::Output;` where
Self: 'a + Send,

Boxes the writer and changes its type to dyn AsyncWrite + Send + 'a. Read more

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

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

fn into(self) -> U

Calls U::from(self).

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

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct async_std::io::Stderr

Note: Windows Portability Consideration

Trait Implementations

impl AsRawFd for Stderr

fn as_raw_fd(&self) -> RawFd

impl AsRawHandle for Stderr

fn as_raw_handle(&self) -> RawHandle

impl AsyncWrite for Stderr

fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8]) -> Poll<Result<usize>>

fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>]) -> Poll<Result<usize, Error>>

impl Debug for Stderr

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

Auto Trait Implementations

impl RefUnwindSafe for Stderr

impl Send for Stderr

impl Sync for Stderr

impl Unpin for Stderr

impl UnwindSafe for Stderr

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<W> AsyncWriteExt for W where W: AsyncWrite + ?Sized,

fn write(&'a mut self, buf: &'a [u8]) -> WriteFuture<'a, Self>ⓘNotable traits for WriteFuture<'_, W>impl<'_, W> Future for WriteFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn write_vectored( &'a mut self, bufs: &'a [IoSlice<'a>]) -> WriteVectoredFuture<'a, Self>ⓘNotable traits for WriteVectoredFuture<'_, W>impl<'_, W> Future for WriteVectoredFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn write_all(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self>ⓘNotable traits for WriteAllFuture<'_, W>impl<'_, W> Future for WriteAllFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>; where Self: Unpin,

fn flush(&mut self) -> FlushFuture<'_, Self>ⓘNotable traits for FlushFuture<'_, W>impl<'_, W> Future for FlushFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>; where Self: Unpin,

fn close(&mut self) -> CloseFuture<'_, Self>ⓘNotable traits for CloseFuture<'_, W>impl<'_, W> Future for CloseFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>; where Self: Unpin,

fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a, Global>>ⓘNotable traits for Pin<P>impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output; where Self: 'a + Send,

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

fn borrow(&self) -> &T

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

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

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

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

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

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

fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize>>

fn poll_write_vectored(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>

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

impl<W> AsyncWriteExt for W where
W: AsyncWrite + ?Sized,

fn write(&'a mut self, buf: &'a [u8]) -> WriteFuture<'a, Self>ⓘNotable traits for WriteFuture<'_, W>`impl<'_, W> Future for WriteFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn write_vectored(
&'a mut self,
bufs: &'a [IoSlice<'a>]
) -> WriteVectoredFuture<'a, Self>ⓘNotable traits for WriteVectoredFuture<'_, W>`impl<'_, W> Future for WriteVectoredFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn write_all(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self>ⓘNotable traits for WriteAllFuture<'_, W>`impl<'_, W> Future for WriteAllFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

fn flush(&mut self) -> FlushFuture<'_, Self>ⓘNotable traits for FlushFuture<'_, W>`impl<'_, W> Future for FlushFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

fn close(&mut self) -> CloseFuture<'_, Self>ⓘNotable traits for CloseFuture<'_, W>`impl<'_, W> Future for CloseFuture<'_, W> where W: AsyncWrite + Unpin + ?Sized, type Output = Result<(), Error>;` where
Self: Unpin,

fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a, Global>>ⓘNotable traits for Pin<P>`impl<P> Future for Pin<P> where P: DerefMut, <P as Deref>::Target: Future, type Output = <<P as Deref>::Target as Future>::Output;` where
Self: 'a + Send,

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

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

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

impl<T, U> TryFrom<U> for T where
U: Into<T>,

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