Struct async_std::io::Empty

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pub struct Empty { /* private fields */ }

Expand description

A reader that contains no data.

This reader is created by the empty function. See its documentation for more.

Trait Implementations

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impl AsyncBufRead for Empty

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fn poll_fill_buf<'a>(
self: Pin<&'a mut Self>,
_: &mut Context<'_>
) -> Poll<Result<&'a [u8 ]>>

Attempt to return the contents of the internal buffer, filling it with more data from the inner reader if it is empty. Read more

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fn consume(self: Pin<&mut Self>, _: usize)

Tells this buffer that amt bytes have been consumed from the buffer, so they should no longer be returned in calls to poll_read. Read more

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impl AsyncRead for Empty

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

Attempt to read from the AsyncRead into buf. Read more

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

Attempt to read from the AsyncRead into bufs using vectored IO operations. Read more

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impl Debug for Empty

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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 Empty

impl Send for Empty

impl Sync for Empty

impl Unpin for Empty

impl UnwindSafe for Empty

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<R> AsyncBufReadExt for R where
R: AsyncBufRead + ?Sized,

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

Returns the contents of the internal buffer, filling it with more data if empty. Read more

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fn consume(&mut self, amt: usize) where
Self: Unpin,

Consumes amt buffered bytes. Read more

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fn read_until(
 &'a mut self,
 byte: u8,
 buf: &'a mut Vec<u8, Global>
) -> ReadUntilFuture<'a, Self>ⓘNotable traits for ReadUntilFuture<'_, R>`impl<'_, R> Future for ReadUntilFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
 Self: Unpin,

Reads all bytes and appends them into buf until the delimiter byte or EOF is found. Read more

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fn read_line(&'a mut self, buf: &'a mut String) -> ReadLineFuture<'a, Self>ⓘNotable traits for ReadLineFuture<'_, R>`impl<'_, R> Future for ReadLineFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

Reads all bytes and appends them into buf until a newline (the 0xA byte) or EOF is found. Read more

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fn lines(self) -> Lines<Self> where
Self: Unpin,

Returns a stream over the lines of this byte stream. Read more

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fn split(self, byte: u8) -> Split<Self>

Returns a stream over the contents of this reader split on the specified byte. Read more

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impl<R> AsyncReadExt for R where
R: AsyncRead + ?Sized,

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

Reads some bytes from the byte stream. Read more

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fn read_vectored(
 &'a mut self,
 bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectoredFuture<'a, Self>ⓘNotable traits for ReadVectoredFuture<'_, R>`impl<'_, R> Future for ReadVectoredFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
 Self: Unpin,

Like read(), except it reads into a slice of buffers. Read more

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fn read_to_end(
 &'a mut self,
 buf: &'a mut Vec<u8, Global>
) -> ReadToEndFuture<'a, Self>ⓘNotable traits for ReadToEndFuture<'_, R>`impl<'_, R> Future for ReadToEndFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
 Self: Unpin,

Reads the entire contents and appends them to a Vec. Read more

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fn read_to_string(
 &'a mut self,
 buf: &'a mut String
) -> ReadToStringFuture<'a, Self>ⓘNotable traits for ReadToStringFuture<'_, R>`impl<'_, R> Future for ReadToStringFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
 Self: Unpin,

Reads the entire contents and appends them to a String. Read more

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

Reads the exact number of bytes required to fill buf. Read more

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fn take(self, limit: u64) -> Take<Self>

Creates an adapter which will read at most limit bytes from it. Read more

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fn bytes(self) -> Bytes<Self>

Converts this AsyncRead into a Stream of bytes. Read more

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fn chain<R>(self, next: R) -> Chain<Self, R> where
R: AsyncRead,

Creates an adapter which will chain this stream with another. Read more

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fn boxed_reader<'a>(self) -> Pin<Box<dyn AsyncRead + 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 reader and changes its type to dyn AsyncRead + 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::Empty

Trait Implementations

impl AsyncBufRead for Empty

fn poll_fill_buf<'a>( self: Pin<&'a mut Self>, _: &mut Context<'_>) -> Poll<Result<&'a [u8]>>

fn consume(self: Pin<&mut Self>, _: usize)

impl AsyncRead for Empty

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

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

impl Debug for Empty

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

Auto Trait Implementations

impl RefUnwindSafe for Empty

impl Send for Empty

impl Sync for Empty

impl Unpin for Empty

impl UnwindSafe for Empty

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<R> AsyncBufReadExt for R where R: AsyncBufRead + ?Sized,

fn fill_buf(&mut self) -> FillBuf<'_, Self>ⓘNotable traits for FillBuf<'a, R>impl<'a, R> Future for FillBuf<'a, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<&'a [u8], Error>; where Self: Unpin,

fn consume(&mut self, amt: usize) where Self: Unpin,

fn read_until( &'a mut self, byte: u8, buf: &'a mut Vec<u8, Global>) -> ReadUntilFuture<'a, Self>ⓘNotable traits for ReadUntilFuture<'_, R>impl<'_, R> Future for ReadUntilFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn read_line(&'a mut self, buf: &'a mut String) -> ReadLineFuture<'a, Self>ⓘNotable traits for ReadLineFuture<'_, R>impl<'_, R> Future for ReadLineFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn lines(self) -> Lines<Self> where Self: Unpin,

fn split(self, byte: u8) -> Split<Self>

impl<R> AsyncReadExt for R where R: AsyncRead + ?Sized,

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

fn read_vectored( &'a mut self, bufs: &'a mut [IoSliceMut<'a>]) -> ReadVectoredFuture<'a, Self>ⓘNotable traits for ReadVectoredFuture<'_, R>impl<'_, R> Future for ReadVectoredFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn read_to_end( &'a mut self, buf: &'a mut Vec<u8, Global>) -> ReadToEndFuture<'a, Self>ⓘNotable traits for ReadToEndFuture<'_, R>impl<'_, R> Future for ReadToEndFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

fn read_to_string( &'a mut self, buf: &'a mut String) -> ReadToStringFuture<'a, Self>ⓘNotable traits for ReadToStringFuture<'_, R>impl<'_, R> Future for ReadToStringFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>; where Self: Unpin,

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

fn take(self, limit: u64) -> Take<Self>

fn bytes(self) -> Bytes<Self>

fn chain<R>(self, next: R) -> Chain<Self, R> where R: AsyncRead,

fn boxed_reader<'a>(self) -> Pin<Box<dyn AsyncRead + 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_fill_buf<'a>(
self: Pin<&'a mut Self>,
_: &mut Context<'_>
) -> Poll<Result<&'a [u8 ]>>

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

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

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

impl<R> AsyncBufReadExt for R where
R: AsyncBufRead + ?Sized,

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

fn consume(&mut self, amt: usize) where
Self: Unpin,

fn read_until(
&'a mut self,
byte: u8,
buf: &'a mut Vec<u8, Global>
) -> ReadUntilFuture<'a, Self>ⓘNotable traits for ReadUntilFuture<'_, R>`impl<'_, R> Future for ReadUntilFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn read_line(&'a mut self, buf: &'a mut String) -> ReadLineFuture<'a, Self>ⓘNotable traits for ReadLineFuture<'_, R>`impl<'_, R> Future for ReadLineFuture<'_, R> where R: AsyncBufRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn lines(self) -> Lines<Self> where
Self: Unpin,

impl<R> AsyncReadExt for R where
R: AsyncRead + ?Sized,

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

fn read_vectored(
&'a mut self,
bufs: &'a mut [IoSliceMut<'a>]
) -> ReadVectoredFuture<'a, Self>ⓘNotable traits for ReadVectoredFuture<'_, R>`impl<'_, R> Future for ReadVectoredFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn read_to_end(
&'a mut self,
buf: &'a mut Vec<u8, Global>
) -> ReadToEndFuture<'a, Self>ⓘNotable traits for ReadToEndFuture<'_, R>`impl<'_, R> Future for ReadToEndFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

fn read_to_string(
&'a mut self,
buf: &'a mut String
) -> ReadToStringFuture<'a, Self>ⓘNotable traits for ReadToStringFuture<'_, R>`impl<'_, R> Future for ReadToStringFuture<'_, R> where R: AsyncRead + Unpin + ?Sized, type Output = Result<usize, Error>;` where
Self: Unpin,

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

fn chain<R>(self, next: R) -> Chain<Self, R> where
R: AsyncRead,

fn boxed_reader<'a>(self) -> Pin<Box<dyn AsyncRead + 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>,