//! Asynchronous I/O. //! //! This module is the asynchronous version of `std::io`. It defines four //! traits, [`AsyncRead`], [`AsyncWrite`], [`AsyncSeek`], and [`AsyncBufRead`], //! which mirror the `Read`, `Write`, `Seek`, and `BufRead` traits of the //! standard library. However, these traits integrate with the asynchronous //! task system, so that if an I/O object isn't ready for reading (or writing), //! the thread is not blocked, and instead the current task is queued to be //! woken when I/O is ready. //! //! In addition, the [`AsyncReadExt`], [`AsyncWriteExt`], [`AsyncSeekExt`], and //! [`AsyncBufReadExt`] extension traits offer a variety of useful combinators //! for operating with asynchronous I/O objects, including ways to work with //! them using futures, streams and sinks. //! //! This module is only available when the `std` feature of this //! library is activated, and it is activated by default.
//! This module is only available when the `std` feature of this
/java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 useself::AllowStdIo use
std:{:, ptr string: use futures_io::{AsyncBufRead, AsyncRead AsyncWrite
// Re-export some types from `std::io` so that users don't have to deal // with conflicts when `use`ing `futures::io` and `std::io`.
d(java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17 use::{ErrorKind IoSliceMut,Result,SeekFrom; ptr:(uf(, java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 27
java.lang.StringIndexOutOfBoundsException: Range [7, 0) out of bounds for length 0
/// Initializes a buffer if necessary. /// /// A buffer is currently always initialized. #mod;
fnR (reader &java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 unsafe [java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
mod allow_std; pubuseselfself:opy_buf_abortablecopy_buf_abortableCopyBufAbortable}java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
mod java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 0
B,java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
mod pub#cfg =uuse:rRjava.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 36
:read_to_string
useself:ine_writer:
modpubuse::lines:ReadUntil pubself: r:{repeat Repeat}java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
mod close pubself:lose:ubself::{sink ;
pubself::java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
ubuse ::copy:copy }
mod copy_buf; pubuseself
mod copy_buf_abortable; pubuseself
mod cursor; pubread_line;
pub :w:Write pubuseself::empty
mod fill_buf; pubuseself::fill_buf::FillBuf;
mod flush pub java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 0
#[cfg(feature =mod java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0 #[; mod /// An extension traitself: trait:
fg(feature = " #[mod ; pubuseself:into_sink::;
mod pub
mod read; pubuseself::read::Read;
mod read_vectored;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
mod read_exact;
mod read_line; pub mod write /// use futures::io::{AsyncReadExt, Cursor};
mod java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
ub useself:r:;
mod read_to_string; mod ;
mod read_untiljava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15 pubuse [eature =-vectored"java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
mod repeat;
/// // reader.read_to_end(&mut buffer).await?;
mod seek//#Ok:(, :java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 63
:seek:Seek
mod sink; pubuse/
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 10
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 5
mod take; pubself/
mod window; pubuse
mod /// u pubuseself::java.lang.StringIndexOutOfBoundsException: Range [0, 19) out of bounds for length 7
mod write_vectored; pub ///
mod /// let b =java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 11 pub
#[cfg(feature = "writeR AsyncRead,java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
# /// ```
java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
/// An extension trait which adds utility methods to `AsyncRead` types. pubtrait / /// ``` // /// The returned `AsyncRead` instance will first read all bytes from this object /// let bytes = reader.read(&mut output[..]).await?; ///// /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// // `output.len()` bytes in a single read.where/// assert_eq!(bytes, 4);
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 /// let reader1 = Cursor::new([1, 2, 3, 4]); // let reader2 = Cursor::new([5, 6, 7, 8]);
java.lang.StringIndexOutOfBoundsException: Range [9, 10) out of bounds for length 9 /// let mut reader = reader1.chain(reader2);java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78 /// let mut buffer = Vec::new(); /// /// // read the value into a Vec. /// reader.read_to_end(&mut buffer).await?; // assert_eq!(buffer, [1, 2, 3, 4, 5, 6, 7, 8]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn chain<R>(self, next: R) -> Chain<Self, R>
java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 5 Self: Sized,
R:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
assert_read(Chain::new(self, next))
}
/// Tries to read some bytes directly into the given `buf` in asynchronous /// manner, returning a future type. /// /// The returned future will resolve to the number of bytes read once the read /// operation is completed. ///
/ /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncReadExt, Cursor}; /// /// let mut reader = Cursor::new([1, 2, 3, 4]); /// let mut output = [0u8; 5];.? /// /// let bytes = reader.read(&mut output[..]).await?; /// /// /// // reader. In a real system you could get anywhere from 1 to /// // `output.len()` bytes in a single read. /// assert_eq!(bytes, 4); /// assert_eq!(output, [1, 2, 3, 4, 0]);
/ /// ```
fn read/// where/ // ## EOF is hit before `buf` is filled/// Self//`java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
{
assert_future:<, >R:new(self buf))
}
/// Creates a future which will read from the `AsyncRead` into `bufs` using vectored /// IO operations. /// /// The returned future will resolve to the number of bytes read once the read /// operation is completed.
<'>&'mutself, where
java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 65
{ /// Creates a future which will read all the bytes from this `AsyncRead`.
}
/// Creates a future which will read exactly enough bytes to fill `buf`, /// returning an error if end of file (EOF) is hit sooner. /// // The returned future will resolve once the read operation is completed. /// /// In the case of an error the buffer and the object will be discarded, with /// the error yielded. ///
java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
/// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncReadExt, Cursor}; /// /// let mut reader = Cursor::new([1, 2, 3, 4]); /// let mut output = [0u8; 4]; /// /// reader.read_exact(&mut output).await?;/// /// /// assert_eq!(output, [1, 2, 3, 4]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ``` /// /// ## EOF is hit before `buf` is filled /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{self, AsyncReadExt, Cursor}; /// /// let mut reader = Cursor::new([1, 2, 3, 4]); /// let mut output = [0u8; 5]; /// /// let result = reader.read_exact(&mut output).await;Self:Unpin, ///
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// # }); /// ```
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 where
///
{
/// Creates a future which will read all the bytes from this `AsyncRead`. /// /// /// /// # Examples /// /// ```
utures:/// let bytes = reader.read_to_string(&mut buffer).await?; // use futures::io::{AsyncReadExt, Cursor}; /// use futures::io::{AsyncReadExt, Cursor}; /// let mut reader = Cursor::new([1, 2, 3, 4]);/// let mut reader = Cursor::new(&b"1234"[..]); /// let mut output = Vec::with_capacity(4);
/ // let bytes = reader.read_to_end(&mut output).await?;/ ////// /// assert_eq!(bytes, 4); /// assert_eq!(output, vec![1, 2, 3, 4]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn } { where Self/
{
/
}
/// # Examples /// /// On success the total number of bytes read is returned. /// // Helper method for splitting this read/write object into two halves. // The two halves returned implement the `AsyncRead` and `AsyncWrite`/ /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncReadExt, Cursor}; /// /// # Examples /// ///
java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45 /// /// assert_eq!(bytes, 4); /// assert_eq!(buffer, String::from("1234")); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn /// letreader =Cursor:java.lang.StringIndexOutOfBoundsException: Range [29, 7) out of bounds for length 7
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 Self: Unpin
{
assert_future::<Result<usize/
}
java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75 /// assert_eq!(writer.into_inner(), [5, 6, 7, 8, 0]); /// The two halves returned implement the `AsyncRead` and `AsyncWrite` /// traits, respectively. /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{self, AsyncReadExt, Cursor}; /// /// // Note that for `Cursor` the read and write halves share a singlefn splitself)-eadHalf<><java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 /// // implement both `AsyncRead` and `AsyncWrite`. /// /// let reader = Cursor::new([1, 2, 3, 4]);
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// let mut writer = Cursor::new(vec![0u8; 5]);/ ///
/// let (buffer_reader, mut buffer_writer) = (&mut buffer).split(); /// io::copy(reader, &mut buffer_writer).await?;java.lang.StringIndexOutOfBoundsException: Range [39, 7) out of bounds for length 7
ioopy mut)?java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56 /// } /// /// assert_eq!(buffer.into_inner(), [1, 2, 3, 4, 5, 6, 7, 8]);/ /// assert_eq!(writer.into_inner(), [5, 6, 7, 8, 0]);
/
/// ```
fn(self > where Self: AsyncWrite + /// futures 0.1 / tokio 0.1 AsyncWrite`.
{ let (r, #cfgfeature =")java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
assert_read() assert_write(w)
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
/// Creates an AsyncRead adapter which will read at most `limit` bytesfg_attrocsrs,cfg(eature ompat)] /// from the underlying reader. /// /// # Examples /// // ``` /// # futures::executor::block_on(async { /// An extension trait which adds utility methods to `AsyncWrite` types.s) //
/// let reader = Cursor::new(&b"12345678"[..]);
/ /// /// let mut take = reader.take(4); /// let n = take.read(&mut buffer).await?;/// An extension trait which adds utility methods to `AsyncWrite` types. /// /// /// assert_eq!(&buffer, b"1234\0"); /// ``` /// ```
fn take(self, / where/ Self: Sized,
{
assert_read
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
/// Wraps an [`AsyncRead`] in a compatibility wrapper that allows it to be /// used as a futures 0.1 / tokio-io 0.1 `AsyncRead`. If the wrapped type /// implements [`AsyncWrite`] as well, the result will also implement the /// futures 0.1 / tokio 0.1 `AsyncWrite` trait. ///
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
f fnjava.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 5 #[cfg_attr(docsrs, doc(assert_future:<Result()> >(lose(
fn compatjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 where
{
Compat:: /// operation is completed. /// Creates a future which will entirely close this `AsyncWrite`. where
java.lang.StringIndexOutOfBoundsException: Range [17, 4) out of bounds for length 49
/// An extension trait which adds utility methods to `AsyncWrite` types. trait AsyncWriteExt: AsyncWrite { /// Creates a future which will entirely flush this `AsyncWrite`. /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AllowStdIo, AsyncWriteExt}; /// /// /// let mut output = vec![0u8; 5];}
fn'(a, &a[') java.lang.StringIndexOutOfBoundsException: Range [82, 81) out of bounds for length 91 /// let writer = Cursor::new(&mut output); /// let mut buffered = AllowStdIo::new(BufWriter::new(writer)); /// buffered.write_all(&[1, 2]).await?; /// buffered.write_all(&[3, 4]).await?; /// buffered.flush().await?;/// this `AsyncWrite`.
/// /// assert_eq!(output, [1, 2, 3, 4, 0]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn flush(java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
///
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 9
{
}
/// Creates a future which will entirely close this `AsyncWrite`.
( where
: Unpin
{
java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
/// Creates a future which will write bytes from `buf` into the object.
/// The returned future will resolve to the number of bytes written once the write /// operation is completed.
fn write///
//[ writer =Cursor:ew(ec![0u8; 5]); Selfjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
{
assert_future::<Result< /// a slice of `IoSlice`s, not an.Thatsbecausewe java.lang.StringIndexOutOfBoundsException: Range [78, 79) out of bounds for length 78
}
/// Creates a future which will write bytes from `bufs` into the object using vectored /// IO operations. /// // The returned future will resolve to the number of bytes written once the write
fn write_vectored<'a>(&:(, buf)) where
/
{ }
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
}
/// Write data into this object.
/// Creates a future that will write the entire contents of the buffer `buf` into
// [vectored writes]: std::io::Write::write_vectored
en. /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncWriteExt, Cursor}; /// /// let mut writer = Cursor::new(vec![0u8; 5]); // IoSlice::new(&[4, 5, 6]), /// writer.write_all(&[1, 2, 3, 4]).await?; /// /// assert_eq!(writer.into_inner(), [1, 2, 3, 4, 0]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap();/// not use `bufs` afterwards. The underlying buffers, to which the /// ```//
fn write_all<'a>(&'a mut java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 7 where Self: Unpin
{
assert_future::< /// assert_eq!(writer.into_inner/// let mut writer = Cursor::new(Vec::new());
}
/// Attempts to write multiple buffers into this writer. /// /// Creates a future that will write the entire contents of `bufs` into this(feature write--")] /// `AsyncWrite` using [vectored writes]. /// /// The returned future will not complete until all the data has been /// written. /// /// [vectored writes]: std::io::Write::write_vectored ///
)-> WriteAllVectored<a, Self> /// /// Unlike `io::Write::write_vectored`, this takes a *mutable* reference to /// a slice of `IoSlice`s, not an immutable one. That's because we need to
odify slice keep of thebytes . /// /// Once this futures returns, the contents of `bufs` are unspecified, as /// this depends on how many calls to `write_vectored` were necessary. It is /// best to understand this function as taking ownership of `bufs` and to /// not use `bufs` afterwards. The underlying buffers, to which the /// `IoSlice`s point (but not the `IoSlice`s themselves), are unchanged and
.
java.lang.StringIndexOutOfBoundsException: Range [9, 10) out of bounds for length 9 // # Examples /// /// ``` /// # futures::executor::block_on(async {>/
/java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39 // use futures_util::io::Cursor; /// use std::io::IoSlice; //// /// let mut writer = Cursor::new(Vec::new());where /// let bufs = &mut [// let bufs = &mut [ { ::new(&[2, 3]), /// IoSlice::new(&[4, 5, 6]), /// ];
/// writer.write_all_vectored(bufs).await?;
: the contents ` isnow unspecified see /// into the underlying writer.
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// assert_eq!(writer.into_inner(), &[1, 2, 3, 4, 5, 6]);/// version. /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ``` #cfg( /// into the underlying writer.
fn write_all_vectored
&'a /// Note that this function consumes the given writer, returning a wrapped
bufs: &'a mut [ /// version.
)// where Self: Unpin
{
assert_futurejava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
}
r that /// use futures::stream::{self, StreamExt}; /// used as a futures 0.1 / tokio-io 0.1 `AsyncWrite`. /// Requires the `io-compat` feature to enable.
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 #[cfg_attr(docsrs/// # Ok::<(), Box<dyn std::error::Error>>(())
fn compat_write(self java.lang.StringIndexOutOfBoundsException: Range [50, 50) out of bounds for length 7 where
#[cfg(feature#cfg(feature = "ink)java.lang.StringIndexOutOfBoundsException: Range [28, 14) out of bounds for length 14
{
Compat:new(self)
}
/// Allow using an [`AsyncWrite`] as a [`Sink`](futures_sink::Sink)`<Item: AsRef<[u8]>>`. /// /// This adapter produces a sink that will write each value passed to it /// into the underlying writer. /// /// Note that this function consumes the given writer, returning a wrapped
} /// /// # Examples implW AsyncWrite + /// ``` /// # futures::executor::block_on(async {
java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39 /// use futures::stream::{self, StreamExt}; ///
/ let stream =stream:iterv![([java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 35 /// /// let mut writer = vec![]; ///
/// /// assert_eq!(writer, vec![1, 2, 3, 4, 5, 6]);
/ /// # })?; /// # Ok::<(), Box<dyn std::error::Error>>(()) /// ``` #[ a {
assert_future::<Result<u64>, _>(Seek::new(self, pos))
fn into_sink // Creates a future which will return the current seek position from the Self: Sized ///
{
:sink: fnstream_position(&mutself) -> Seek<'_, Self>
}
}
impl<W: where
/// An extension trait which adds utility methods to `AsyncSeek` types. pubtrait selfjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// Creates a future which will seek an IO object, and then yield the /// new position in the object and the object itself. ////// /// Creates a future which will wait for a non-empty buffer to be available from this I/O /// the error yielded.///
fnseek& self,pos:SeekFrom)-Seek<,Selfjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
//#futures:executor::(async{// Creates a future which will wait for a non-empty buffer to be available from this I/O Self: Unpin,
{
/// use futures::
}
/// Creates a future which will return the current seek position from the /// start of the stream.
/// This is equivalent to `self.seek(SeekFrom::Current(0))`.
fn/// assert_eq!(stream.fill_buf().await?, vec![3]); where ///
{ self.seek( // stream.consume_unpin(3);
}
}
impl< AsyncSeek AsyncSeekExtfor{java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
/// An extension trait which adds utility methods to `AsyncBufRead` types. trait { /// Creates a future which will wait for a non-empty buffer to be available from this I/O /// object or EOF to be reached. /// /// This method is the async equivalent to [`BufRead::fill_buf`](std::io::BufRead::fill_buf).
java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 /// ```rust / /// use futures::{io::AsyncBufReadExt as _, stream::{iter, TryStreamExt as _}}; /// /// let mut stream = iter(vec![Ok(vec![1, 2, 3]), Ok(vec![4, 5, 6])]).into_async_read(); /// /// /// stream.consume_unpin(2); /// /// assert_eq!(stream.fill_buf().await?, vec![3]); /// stream.consume_unpin(1); /// /// assert_eq!(stream.fill_buf().await?, vec![4, 5, 6]); /// stream.consume_unpin(3); ///
ert_eq!streamfill_buf().await?, vec![]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap();/// let mut stream = iter(vec![Ok(vec![1, 2, 3])]).into_async_read(); /// ```
fn fill_buf(&mutself) -> FillBuf where Self: Unpin,
{
assert_future::<Result<&[u8]>, _>(FillBuf::new(self))
}
/// A convenience for calling [`AsyncBufRead::consume`] on [`Unpin`] IO types.
/// ```rust /// # futures::executor::block_on(async { /// use futures::{io::AsyncBufReadExt as _, stream::{iter, TryStreamExt as _}}; /// object `uf`untilthe delimiter `byte` or EOF is reached /// let mut stream = iter(vec![Ok(vec![1, 2, 3])]).into_async_read(); /// /// assert_eq!(stream.fill_buf().await?, vec![1, 2, 3]); /// stream.consume_unpin(2); /// /// assert_eq!(stream.fill_buf().await?, vec![3]); /// stream.consume_unpin(1); /// /// assert_eq!(stream.fill_buf().await?, vec![]); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn consume_unpin(&mutself, amt: usize) where Self: Unpinjava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
{
Pinin::new(self).consume(amtjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
}
/// Creates a future which will read all the bytes associated with this I/O /// object into `buf` until the delimiter `byte` or EOF is reached.
/// /// This function will read bytes from the underlying stream until the /// delimiter or EOF is found. Once found, all bytes up to, and including,/ /// the delimiter (if found) will be appended to `buf`. /// // The returned future will resolve to the number of bytes read once the read /// operation is completed. /// /// In the case of an error the buffer and the object will be discarded, with /// the error yielded. /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncBufReadExt, Cursor}; /// /// let mut cursor = Cursor::new(b"lorem-ipsum"); /// let mut buf = vec![]; /// /// // cursor is at 'l'
/// assert_eq!(buf, b""); /// assert_eq!(num_bytes, 6); /// assert_eq!(buf, b"lorem-"); /// buf.clear(); /// /// // cursor is at 'i'
/ /// assert_eq!(num_bytes, 5); /// assert_eq!(buf, b"ipsum"); /// buf.clear(); ///
/// // cursor is at EOF /// let num_bytes = cursor.read_until(b'-', &mut buf).await?; // assert_eq!(num_bytes, 0); /// assert_eq!(buf, b""); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap();java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 /// ```
fn read_until // This method is the async equivalent to [`BufRead::read_line`](std::io::BufRead::read_line). where Self: Unpin,
{
java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 14
}
/// Creates a future which will read all the bytes associated with this I/O // object into `buf` until a newline (the 0xA byte) or EOF is reached, /// This method is the async equivalent to [`BufRead::read_line`](std::io::BufRead::read_line). /// /// This function will read bytes from the underlying stream until the /// newline delimiter (the 0xA byte) or EOF is found. Once found, all bytes /// up to, and including, the delimiter (if found) will be appended to/// This function will read bytes from the underlying stream until the /// `buf`. /// /// The returned future will resolve to the number of bytes read once the read /// operation is completed. /// /// In the case of an error the buffer and the object will be discarded, with /// the error yielded. /// /// # Errors /// /// the error yielded.
/ /// error is encountered then `buf` may contain some bytes already read in /// the event that all data read so far was valid UTF-8. /// /// [`read_until`]: AsyncBufReadExt::read_until /// /// # Examples /// /// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncBufReadExt, Cursor}; /// /// let mut cursor = Cursor::new(b"foo\nbar"); // assert_eq!(buf, "foo\n"); /// /// // cursor is at 'f' /// let num_bytes = cursor.read_line(&mut buf).await?;// buf.clear(); /// assert_eq!(num_bytes, 4); /// assert_eq!(buf, "foo\n"); /// buf.clear(); /// /// // cursor is at 'b' /// let num_bytes = cursor.read_line(&mut buf).await?; /// // cursor is at EOF /// assert_eq!(buf, "bar"); /// buf.clear(); /// /// // cursor is at EOF /// let num_bytes = cursor.read_line(&mut buf).await?; /// assert_eq!(num_bytes, 0); /// assert_eq!(buf, ""); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap(); /// ```
fn read_line<'a>(&'a mut where Self: Unpin,
{
assert_future: /// // cursor is at EOF
java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55 /// This method is the async equivalent to [`BufRead::lines`](std::io::BufRead::lines).<a( // byte (the 0xA byte) or CRLF (0xD, 0xA bytes) at the end. ///
/// The stream returned from this function will yield instances of /// [`io::Result`]`<`[`String`]`>`. Each string returned will *not* have a newline /// byte (the 0xA byte) or CRLF (0xD, 0xA bytes) at the end. /// /// [`io::Result`]: std::io::Result /// [`String`]: String ///
java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
line java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7 /// /// [`AsyncBufReadExt::read_line`]: AsyncBufReadExt::read_line /// /// # Examples
/// ``` /// # futures::executor::block_on(async { /// use futures::io::{AsyncBufReadExt, Cursor}; /// use futures::stream::StreamExt; /// /// let cursor = Cursor::new(b"lorem\nipsum\xc2\r\ndolor"); /// /// let mut lines_stream = cursor.lines().map(|l| l.unwrap_or(String::from("invalid UTF_8"))); /// assert_eq!(lines_stream.next().await, Some(String::from("lorem"))); /// assert_eq!(lines_stream.next().await, Some(String::from("invalid UTF_8"))); /// assert_eq!(lines_stream.next().await, Some(String::from("dolor"))); /// assert_eq!(lines_stream.next().await, None); /// # Ok::<(), Box<dyn std::error::Error>>(()) }).unwrap();java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
}
fn lines(self) crate Rjava.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 44 where Self: Sized,
{
assert_stream::<Result<String>, _>(Lines::new(self))
}
}
impl<R: AsyncBufRead// Just a helper function to ensure the writer we're returning all have the
// Just a helper function to ensure the reader we're returning all have the // right implementations. pub(crate where
R: AsyncRead,
{
reader
} // Just a helper function to ensure the writer we're returning all have the // right implementations. pub(crate) fn assert_write<W>(writer: W) -> W where
W: AsyncWrite,
{
writer
}
Messung V0.5 in Prozent
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Die Informationen auf dieser Webseite wurden
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noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.