Struct async_std::io::Empty

[+] Show declaration

pub struct Empty { /* fields omitted */ }

[−] Expand description

A reader that contains no data.

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

Trait Implementations

impl BufRead for Empty[+]

[+] Show hidden undocumented items

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

Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty.

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 read.

fn read_until<'a>(
    &'a mut self,
    byte: u8,
    buf: &'a mut Vec<u8>
) -> ImplFuture<usize> where
    Self: Unpin, [−]

Reads all bytes into buf until the delimiter byte or EOF is reached.

fn read_line<'a>(&'a mut self, buf: &'a mut String) -> ImplFuture<Result<usize>> where
    Self: Unpin, [−]

Reads all bytes and appends them into buf until a newline (the 0xA byte) is reached.

fn lines(self) -> Lines<Self> where
    Self: Unpin + Sized, [−]

Returns a stream over the lines of this byte stream.

fn split(self, byte: u8) -> Split<Self> where
    Self: Sized, [−]

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

impl Debug for Empty[+]

[+] Show hidden undocumented items

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

Formats the value using the given formatter.

impl Read for Empty[+]

[+] Show hidden undocumented items

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

Attempt to read from the AsyncRead into buf.

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

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

fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> ImplFuture<Result<usize>> where
    Self: Unpin, [−]

Reads some bytes from the byte stream.

fn read_vectored<'a>(
    &'a mut self,
    bufs: &'a mut [IoSliceMut<'a>]
) -> ImplFuture<Result<usize>> where
    Self: Unpin, [−]

Like [read], except that it reads into a slice of buffers.

fn read_to_end<'a>(
    &'a mut self,
    buf: &'a mut Vec<u8>
) -> ImplFuture<Result<usize>> where
    Self: Unpin, [−]

Reads all bytes from the byte stream.

fn read_to_string<'a>(
    &'a mut self,
    buf: &'a mut String
) -> ImplFuture<Result<usize>> where
    Self: Unpin, [−]

Reads all bytes from the byte stream and appends them into a string.

fn read_exact<'a>(&'a mut self, buf: &'a mut [u8]) -> ImplFuture<Result<()>> where
    Self: Unpin, [−]

Reads the exact number of bytes required to fill buf.

fn take(self, limit: u64) -> Take<Self> where
    Self: Sized, [−]

Creates an adaptor which will read at most limit bytes from it.

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

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

fn bytes(self) -> Bytes<Self> where
    Self: Sized, [−]

Transforms this Read instance to a Stream over its bytes.

fn chain<R: Read>(self, next: R) -> Chain<Self, R> where
    Self: Sized, [−]

Creates an adaptor which will chain this stream with another.