pub struct AssertAsync<T>(/* private fields */);
Expand description
Asserts that a type implementing std::io
traits can be used as an async type.
The underlying I/O handle should never block nor return the ErrorKind::WouldBlock
error.
This is usually the case for in-memory buffered I/O.
§Examples
use futures_lite::io::{AssertAsync, AsyncReadExt};
let reader: &[u8] = b"hello";
let mut async_reader = AssertAsync::new(reader);
let mut contents = String::new();
// This line works in async manner - note that there is await:
async_reader.read_to_string(&mut contents).await?;
Implementations§
source§impl<T> AssertAsync<T>
impl<T> AssertAsync<T>
sourcepub fn get_ref(&self) -> &T
pub fn get_ref(&self) -> &T
Gets a reference to the inner I/O handle.
§Examples
use futures_lite::io::AssertAsync;
let reader: &[u8] = b"hello";
let async_reader = AssertAsync::new(reader);
let r = async_reader.get_ref();
sourcepub fn get_mut(&mut self) -> &mut T
pub fn get_mut(&mut self) -> &mut T
Gets a mutable reference to the inner I/O handle.
§Examples
use futures_lite::io::AssertAsync;
let reader: &[u8] = b"hello";
let mut async_reader = AssertAsync::new(reader);
let r = async_reader.get_mut();
sourcepub fn into_inner(self) -> T
pub fn into_inner(self) -> T
Extracts the inner I/O handle.
§Examples
use futures_lite::io::AssertAsync;
let reader: &[u8] = b"hello";
let async_reader = AssertAsync::new(reader);
let inner = async_reader.into_inner();
Trait Implementations§
source§impl<T: Read> AsyncRead for AssertAsync<T>
impl<T: Read> AsyncRead for AssertAsync<T>
source§impl<T: Seek> AsyncSeek for AssertAsync<T>
impl<T: Seek> AsyncSeek for AssertAsync<T>
source§impl<T: Write> AsyncWrite for AssertAsync<T>
impl<T: Write> AsyncWrite for AssertAsync<T>
source§fn poll_write(
self: Pin<&mut Self>,
_: &mut Context<'_>,
buf: &[u8],
) -> Poll<Result<usize>>
fn poll_write( self: Pin<&mut Self>, _: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize>>
Attempt to write bytes from
buf
into the object. Read moresource§fn poll_write_vectored(
self: Pin<&mut Self>,
_: &mut Context<'_>,
bufs: &[IoSlice<'_>],
) -> Poll<Result<usize>>
fn poll_write_vectored( self: Pin<&mut Self>, _: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll<Result<usize>>
Attempt to write bytes from
bufs
into the object using vectored
IO operations. Read moresource§impl<T: Clone> Clone for AssertAsync<T>
impl<T: Clone> Clone for AssertAsync<T>
source§fn clone(&self) -> AssertAsync<T>
fn clone(&self) -> AssertAsync<T>
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl<T: Debug> Debug for AssertAsync<T>
impl<T: Debug> Debug for AssertAsync<T>
source§impl<T: Hash> Hash for AssertAsync<T>
impl<T: Hash> Hash for AssertAsync<T>
source§impl<T: Ord> Ord for AssertAsync<T>
impl<T: Ord> Ord for AssertAsync<T>
source§fn cmp(&self, other: &AssertAsync<T>) -> Ordering
fn cmp(&self, other: &AssertAsync<T>) -> Ordering
1.21.0 · source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Compares and returns the maximum of two values. Read more
source§impl<T: PartialEq> PartialEq for AssertAsync<T>
impl<T: PartialEq> PartialEq for AssertAsync<T>
source§impl<T: PartialOrd> PartialOrd for AssertAsync<T>
impl<T: PartialOrd> PartialOrd for AssertAsync<T>
impl<T: Copy> Copy for AssertAsync<T>
impl<T: Eq> Eq for AssertAsync<T>
impl<T> StructuralPartialEq for AssertAsync<T>
impl<T> Unpin for AssertAsync<T>
Auto Trait Implementations§
impl<T> Freeze for AssertAsync<T>where
T: Freeze,
impl<T> RefUnwindSafe for AssertAsync<T>where
T: RefUnwindSafe,
impl<T> Send for AssertAsync<T>where
T: Send,
impl<T> Sync for AssertAsync<T>where
T: Sync,
impl<T> UnwindSafe for AssertAsync<T>where
T: UnwindSafe,
Blanket Implementations§
source§impl<R> AsyncReadExt for R
impl<R> AsyncReadExt for R
source§fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadFuture<'a, Self> ⓘwhere
Self: Unpin,
fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadFuture<'a, Self> ⓘwhere
Self: Unpin,
Reads some bytes from the byte stream. Read more
source§fn read_vectored<'a>(
&'a mut self,
bufs: &'a mut [IoSliceMut<'a>],
) -> ReadVectoredFuture<'a, Self> ⓘwhere
Self: Unpin,
fn read_vectored<'a>(
&'a mut self,
bufs: &'a mut [IoSliceMut<'a>],
) -> ReadVectoredFuture<'a, Self> ⓘwhere
Self: Unpin,
source§fn read_to_end<'a>(
&'a mut self,
buf: &'a mut Vec<u8>,
) -> ReadToEndFuture<'a, Self> ⓘwhere
Self: Unpin,
fn read_to_end<'a>(
&'a mut self,
buf: &'a mut Vec<u8>,
) -> ReadToEndFuture<'a, Self> ⓘwhere
Self: Unpin,
source§fn read_to_string<'a>(
&'a mut self,
buf: &'a mut String,
) -> ReadToStringFuture<'a, Self> ⓘwhere
Self: Unpin,
fn read_to_string<'a>(
&'a mut self,
buf: &'a mut String,
) -> ReadToStringFuture<'a, Self> ⓘwhere
Self: Unpin,
source§fn read_exact<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadExactFuture<'a, Self> ⓘwhere
Self: Unpin,
fn read_exact<'a>(&'a mut self, buf: &'a mut [u8]) -> ReadExactFuture<'a, Self> ⓘwhere
Self: Unpin,
Reads the exact number of bytes required to fill
buf
. Read moresource§fn take(self, limit: u64) -> Take<Self>where
Self: Sized,
fn take(self, limit: u64) -> Take<Self>where
Self: Sized,
Creates an adapter which will read at most
limit
bytes from it. Read moresource§impl<S> AsyncSeekExt for S
impl<S> AsyncSeekExt for S
source§impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
impl<W> AsyncWriteExt for Wwhere
W: AsyncWrite + ?Sized,
source§fn write<'a>(&'a mut self, buf: &'a [u8]) -> WriteFuture<'a, Self> ⓘwhere
Self: Unpin,
fn write<'a>(&'a mut self, buf: &'a [u8]) -> WriteFuture<'a, Self> ⓘwhere
Self: Unpin,
Writes some bytes into the byte stream. Read more
source§fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>],
) -> WriteVectoredFuture<'a, Self> ⓘwhere
Self: Unpin,
fn write_vectored<'a>(
&'a mut self,
bufs: &'a [IoSlice<'a>],
) -> WriteVectoredFuture<'a, Self> ⓘwhere
Self: Unpin,
source§fn write_all<'a>(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self> ⓘwhere
Self: Unpin,
fn write_all<'a>(&'a mut self, buf: &'a [u8]) -> WriteAllFuture<'a, Self> ⓘwhere
Self: Unpin,
Writes an entire buffer into the byte stream. Read more
source§fn flush(&mut self) -> FlushFuture<'_, Self> ⓘwhere
Self: Unpin,
fn flush(&mut self) -> FlushFuture<'_, Self> ⓘwhere
Self: Unpin,
Flushes the stream to ensure that all buffered contents reach their destination. Read more
source§fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a>>
fn boxed_writer<'a>(self) -> Pin<Box<dyn AsyncWrite + Send + 'a>>
Boxes the writer and changes its type to
dyn AsyncWrite + Send + 'a
. Read moresource§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)