Enum tokio_util::either::Either [−][src]
Combines two different futures, streams, or sinks having the same associated types into a single type.
This type implements common asynchronous traits such as Future
and those in Tokio.
Example
The following code will not work:
#[tokio::main] async fn main() { let result = if some_condition() { some_async_function() } else { other_async_function() // <- Will print: "`if` and `else` have incompatible types" }; println!("Result is {}", result.await); }
When the output type is the same, we can wrap each future in Either
to avoid the
issue:
use tokio_util::either::Either; #[tokio::main] async fn main() { let result = if some_condition() { Either::Left(some_async_function()) } else { Either::Right(other_async_function()) }; let value = result.await; println!("Result is {}", value); }
Variants
Trait Implementations
impl<L, R> AsyncBufRead for Either<L, R> where
L: AsyncBufRead,
R: AsyncBufRead,
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L: AsyncBufRead,
R: AsyncBufRead,
fn poll_fill_buf(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<&[u8]>>
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self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<&[u8]>>
fn consume(self: Pin<&mut Self>, amt: usize)
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impl<L, R> AsyncRead for Either<L, R> where
L: AsyncRead,
R: AsyncRead,
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L: AsyncRead,
R: AsyncRead,
fn poll_read(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut ReadBuf<'_>
) -> Poll<Result<()>>
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self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut ReadBuf<'_>
) -> Poll<Result<()>>
impl<L, R> AsyncSeek for Either<L, R> where
L: AsyncSeek,
R: AsyncSeek,
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L: AsyncSeek,
R: AsyncSeek,
fn start_seek(self: Pin<&mut Self>, position: SeekFrom) -> Result<()>
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fn poll_complete(
self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<u64>>
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self: Pin<&mut Self>,
cx: &mut Context<'_>
) -> Poll<Result<u64>>
impl<L, R> AsyncWrite for Either<L, R> where
L: AsyncWrite,
R: AsyncWrite,
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L: AsyncWrite,
R: AsyncWrite,
fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize>>
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self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8]
) -> Poll<Result<usize>>
fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>
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fn poll_shutdown(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>
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pub fn poll_write_vectored(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>
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self: Pin<&mut Self>,
cx: &mut Context<'_>,
bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>
pub fn is_write_vectored(&self) -> bool
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impl<L: Clone, R: Clone> Clone for Either<L, R>
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impl<L: Debug, R: Debug> Debug for Either<L, R>
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impl<L, R, O> Future for Either<L, R> where
L: Future<Output = O>,
R: Future<Output = O>,
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L: Future<Output = O>,
R: Future<Output = O>,
type Output = O
The type of value produced on completion.
fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>
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impl<L, R> Stream for Either<L, R> where
L: Stream,
R: Stream<Item = L::Item>,
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L: Stream,
R: Stream<Item = L::Item>,
Auto Trait Implementations
impl<L, R> RefUnwindSafe for Either<L, R> where
L: RefUnwindSafe,
R: RefUnwindSafe,
L: RefUnwindSafe,
R: RefUnwindSafe,
impl<L, R> Send for Either<L, R> where
L: Send,
R: Send,
L: Send,
R: Send,
impl<L, R> Sync for Either<L, R> where
L: Sync,
R: Sync,
L: Sync,
R: Sync,
impl<L, R> Unpin for Either<L, R> where
L: Unpin,
R: Unpin,
L: Unpin,
R: Unpin,
impl<L, R> UnwindSafe for Either<L, R> where
L: UnwindSafe,
R: UnwindSafe,
L: UnwindSafe,
R: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<R> AsyncBufReadExt for R where
R: AsyncBufRead + ?Sized,
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R: AsyncBufRead + ?Sized,
pub fn read_until(
&'a mut self,
byte: u8,
buf: &'a mut Vec<u8, Global>
) -> ReadUntil<'a, Self> where
Self: Unpin,
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&'a mut self,
byte: u8,
buf: &'a mut Vec<u8, Global>
) -> ReadUntil<'a, Self> where
Self: Unpin,
pub fn read_line(&'a mut self, buf: &'a mut String) -> ReadLine<'a, Self> where
Self: Unpin,
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Self: Unpin,
pub fn split(self, byte: u8) -> Split<Self> where
Self: Unpin,
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Self: Unpin,
pub fn lines(self) -> Lines<Self>
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impl<R> AsyncReadExt for R where
R: AsyncRead + ?Sized,
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R: AsyncRead + ?Sized,
pub fn chain<R>(self, next: R) -> Chain<Self, R> where
R: AsyncRead,
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R: AsyncRead,
pub fn read(&'a mut self, buf: &'a mut [u8]) -> Read<'a, Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_buf<B>(&'a mut self, buf: &'a mut B) -> ReadBuf<'a, Self, B> where
Self: Unpin,
B: BufMut,
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Self: Unpin,
B: BufMut,
pub fn read_exact(&'a mut self, buf: &'a mut [u8]) -> ReadExact<'a, Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u8(&'a mut self) -> ReadU8<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i8(&'a mut self) -> ReadI8<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u16(&'a mut self) -> ReadU16<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i16(&'a mut self) -> ReadI16<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u32(&'a mut self) -> ReadU32<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i32(&'a mut self) -> ReadI32<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u64(&'a mut self) -> ReadU64<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i64(&'a mut self) -> ReadI64<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u128(&'a mut self) -> ReadU128<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i128(&'a mut self) -> ReadI128<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u16_le(&'a mut self) -> ReadU16Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i16_le(&'a mut self) -> ReadI16Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u32_le(&'a mut self) -> ReadU32Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i32_le(&'a mut self) -> ReadI32Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u64_le(&'a mut self) -> ReadU64Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i64_le(&'a mut self) -> ReadI64Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_u128_le(&'a mut self) -> ReadU128Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_i128_le(&'a mut self) -> ReadI128Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn read_to_end(
&'a mut self,
buf: &'a mut Vec<u8, Global>
) -> ReadToEnd<'a, Self> where
Self: Unpin,
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&'a mut self,
buf: &'a mut Vec<u8, Global>
) -> ReadToEnd<'a, Self> where
Self: Unpin,
pub fn read_to_string(
&'a mut self,
dst: &'a mut String
) -> ReadToString<'a, Self> where
Self: Unpin,
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&'a mut self,
dst: &'a mut String
) -> ReadToString<'a, Self> where
Self: Unpin,
pub fn take(self, limit: u64) -> Take<Self>
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impl<S> AsyncSeekExt for S where
S: AsyncSeek + ?Sized,
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S: AsyncSeek + ?Sized,
impl<W> AsyncWriteExt for W where
W: AsyncWrite + ?Sized,
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W: AsyncWrite + ?Sized,
pub fn write(&'a mut self, src: &'a [u8]) -> Write<'a, Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_buf<B>(&'a mut self, src: &'a mut B) -> WriteBuf<'a, Self, B> where
Self: Unpin,
B: Buf,
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Self: Unpin,
B: Buf,
pub fn write_all(&'a mut self, src: &'a [u8]) -> WriteAll<'a, Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u8(&'a mut self, n: u8) -> WriteU8<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i8(&'a mut self, n: i8) -> WriteI8<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u16(&'a mut self, n: u16) -> WriteU16<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i16(&'a mut self, n: i16) -> WriteI16<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u32(&'a mut self, n: u32) -> WriteU32<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i32(&'a mut self, n: i32) -> WriteI32<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u64(&'a mut self, n: u64) -> WriteU64<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i64(&'a mut self, n: i64) -> WriteI64<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u128(&'a mut self, n: u128) -> WriteU128<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i128(&'a mut self, n: i128) -> WriteI128<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u16_le(&'a mut self, n: u16) -> WriteU16Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i16_le(&'a mut self, n: i16) -> WriteI16Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u32_le(&'a mut self, n: u32) -> WriteU32Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i32_le(&'a mut self, n: i32) -> WriteI32Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u64_le(&'a mut self, n: u64) -> WriteU64Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i64_le(&'a mut self, n: i64) -> WriteI64Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_u128_le(&'a mut self, n: u128) -> WriteU128Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn write_i128_le(&'a mut self, n: i128) -> WriteI128Le<&'a mut Self> where
Self: Unpin,
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Self: Unpin,
pub fn flush(&mut self) -> Flush<'_, Self> where
Self: Unpin,
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Self: Unpin,
pub fn shutdown(&mut self) -> Shutdown<'_, Self> where
Self: Unpin,
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Self: Unpin,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T> FutureExt for T where
T: Future + ?Sized,
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T: Future + ?Sized,
pub fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnOnce(Self::Output) -> U,
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F: FnOnce(Self::Output) -> U,
pub fn map_into<U>(self) -> MapInto<Self, U> where
Self::Output: Into<U>,
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Self::Output: Into<U>,
pub fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnOnce(Self::Output) -> Fut,
Fut: Future,
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F: FnOnce(Self::Output) -> Fut,
Fut: Future,
pub fn left_future<B>(self) -> Either<Self, B> where
B: Future<Output = Self::Output>,
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B: Future<Output = Self::Output>,
pub fn right_future<A>(self) -> Either<A, Self> where
A: Future<Output = Self::Output>,
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A: Future<Output = Self::Output>,
pub fn into_stream(self) -> IntoStream<Self>
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pub fn flatten(self) -> Flatten<Self> where
Self::Output: Future,
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Self::Output: Future,
pub fn flatten_stream(self) -> FlattenStream<Self> where
Self::Output: Stream,
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Self::Output: Stream,
pub fn fuse(self) -> Fuse<Self>
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pub fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnOnce(&Self::Output),
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F: FnOnce(&Self::Output),
pub fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Self: UnwindSafe,
pub fn shared(self) -> Shared<Self> where
Self::Output: Clone,
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Self::Output: Clone,
pub fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)
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pub fn boxed<'a>(
self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send, Global>> where
Self: Send + 'a,
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self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a + Send, Global>> where
Self: Send + 'a,
pub fn boxed_local<'a>(
self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a, Global>> where
Self: 'a,
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self
) -> Pin<Box<dyn Future<Output = Self::Output> + 'a, Global>> where
Self: 'a,
pub fn unit_error(self) -> UnitError<Self>
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pub fn never_error(self) -> NeverError<Self>
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pub fn poll_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Self::Output> where
Self: Unpin,
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Self: Unpin,
pub fn now_or_never(self) -> Option<Self::Output>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<F> IntoFuture for F where
F: Future,
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F: Future,
type Output = <F as Future>::Output
into_future
)The output that the future will produce on completion.
type Future = F
into_future
)Which kind of future are we turning this into?
pub fn into_future(self) -> <F as IntoFuture>::Future
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impl<T> StreamExt for T where
T: Stream + ?Sized,
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T: Stream + ?Sized,
pub fn next(&mut self) -> Next<'_, Self> where
Self: Unpin,
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Self: Unpin,
pub fn into_future(self) -> StreamFuture<Self> where
Self: Unpin,
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Self: Unpin,
pub fn map<T, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> T,
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F: FnMut(Self::Item) -> T,
pub fn enumerate(self) -> Enumerate<Self>
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pub fn filter<Fut, F>(self, f: F) -> Filter<Self, Fut, F> where
F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
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F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
pub fn filter_map<Fut, T, F>(self, f: F) -> FilterMap<Self, Fut, F> where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = Option<T>>,
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F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = Option<T>>,
pub fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where
F: FnMut(Self::Item) -> Fut,
Fut: Future,
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F: FnMut(Self::Item) -> Fut,
Fut: Future,
pub fn collect<C>(self) -> Collect<Self, C> where
C: Default + Extend<Self::Item>,
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C: Default + Extend<Self::Item>,
pub fn unzip<A, B, FromA, FromB>(self) -> Unzip<Self, FromA, FromB> where
Self: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
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Self: Stream<Item = (A, B)>,
FromA: Default + Extend<A>,
FromB: Default + Extend<B>,
pub fn concat(self) -> Concat<Self> where
Self::Item: Extend<<Self::Item as IntoIterator>::Item>,
Self::Item: IntoIterator,
Self::Item: Default,
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Self::Item: Extend<<Self::Item as IntoIterator>::Item>,
Self::Item: IntoIterator,
Self::Item: Default,
pub fn cycle(self) -> Cycle<Self> where
Self: Clone,
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Self: Clone,
pub fn fold<T, Fut, F>(self, init: T, f: F) -> Fold<Self, Fut, T, F> where
F: FnMut(T, Self::Item) -> Fut,
Fut: Future<Output = T>,
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F: FnMut(T, Self::Item) -> Fut,
Fut: Future<Output = T>,
pub fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,
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Self::Item: Stream,
pub fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F> where
F: FnMut(Self::Item) -> U,
U: Stream,
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F: FnMut(Self::Item) -> U,
U: Stream,
pub fn scan<S, B, Fut, F>(self, initial_state: S, f: F) -> Scan<Self, S, Fut, F> where
F: FnMut(&mut S, Self::Item) -> Fut,
Fut: Future<Output = Option<B>>,
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F: FnMut(&mut S, Self::Item) -> Fut,
Fut: Future<Output = Option<B>>,
pub fn skip_while<Fut, F>(self, f: F) -> SkipWhile<Self, Fut, F> where
F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
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F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
pub fn take_while<Fut, F>(self, f: F) -> TakeWhile<Self, Fut, F> where
F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
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F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
pub fn take_until<Fut>(self, fut: Fut) -> TakeUntil<Self, Fut> where
Fut: Future,
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Fut: Future,
pub fn for_each<Fut, F>(self, f: F) -> ForEach<Self, Fut, F> where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
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F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
pub fn for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> ForEachConcurrent<Self, Fut, F> where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
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self,
limit: impl Into<Option<usize>>,
f: F
) -> ForEachConcurrent<Self, Fut, F> where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
pub fn take(self, n: usize) -> Take<Self>
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pub fn skip(self, n: usize) -> Skip<Self>
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pub fn fuse(self) -> Fuse<Self>
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pub fn by_ref(&mut self) -> &mut Self
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pub fn catch_unwind(self) -> CatchUnwind<Self> where
Self: UnwindSafe,
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Self: UnwindSafe,
pub fn boxed<'a>(
self
) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a + Send, Global>> where
Self: Send + 'a,
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self
) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a + Send, Global>> where
Self: Send + 'a,
pub fn boxed_local<'a>(
self
) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>> where
Self: 'a,
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self
) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>> where
Self: 'a,
pub fn buffered(self, n: usize) -> Buffered<Self> where
Self::Item: Future,
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Self::Item: Future,
pub fn buffer_unordered(self, n: usize) -> BufferUnordered<Self> where
Self::Item: Future,
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Self::Item: Future,
pub fn zip<St>(self, other: St) -> Zip<Self, St> where
St: Stream,
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St: Stream,
pub fn chain<St>(self, other: St) -> Chain<Self, St> where
St: Stream<Item = Self::Item>,
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St: Stream<Item = Self::Item>,
pub fn peekable(self) -> Peekable<Self>
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pub fn chunks(self, capacity: usize) -> Chunks<Self>
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pub fn ready_chunks(self, capacity: usize) -> ReadyChunks<Self>
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pub fn forward<S>(self, sink: S) -> Forward<Self, S> where
Self: TryStream,
S: Sink<Self::Ok, Error = Self::Error>,
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Self: TryStream,
S: Sink<Self::Ok, Error = Self::Error>,
pub fn split<Item>(self) -> (SplitSink<Self, Item>, SplitStream<Self>) where
Self: Sink<Item>,
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Self: Sink<Item>,
pub fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
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F: FnMut(&Self::Item),
pub fn left_stream<B>(self) -> Either<Self, B> where
B: Stream<Item = Self::Item>,
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B: Stream<Item = Self::Item>,
pub fn right_stream<B>(self) -> Either<B, Self> where
B: Stream<Item = Self::Item>,
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B: Stream<Item = Self::Item>,
pub fn poll_next_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Self::Item>> where
Self: Unpin,
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&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Self::Item>> where
Self: Unpin,
pub fn select_next_some(&mut self) -> SelectNextSome<'_, Self> where
Self: Unpin + FusedStream,
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Self: Unpin + FusedStream,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T> TokioAsyncReadCompatExt for T where
T: AsyncRead,
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T: AsyncRead,
impl<T> TokioAsyncWriteCompatExt for T where
T: AsyncWrite,
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T: AsyncWrite,
fn compat_write(self) -> Compat<Self> where
Self: Sized,
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Self: Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<F, T, E> TryFuture for F where
F: Future<Output = Result<T, E>> + ?Sized,
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F: Future<Output = Result<T, E>> + ?Sized,
type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
pub fn try_poll(
self: Pin<&mut F>,
cx: &mut Context<'_>
) -> Poll<<F as Future>::Output>
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self: Pin<&mut F>,
cx: &mut Context<'_>
) -> Poll<<F as Future>::Output>
impl<Fut> TryFutureExt for Fut where
Fut: TryFuture + ?Sized,
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Fut: TryFuture + ?Sized,
pub fn flatten_sink<Item>(self) -> FlattenSink<Self, Self::Ok> where
Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
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Self::Ok: Sink<Item>,
<Self::Ok as Sink<Item>>::Error == Self::Error,
pub fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
F: FnOnce(Self::Ok) -> T,
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F: FnOnce(Self::Ok) -> T,
pub fn map_ok_or_else<T, E, F>(self, e: E, f: F) -> MapOkOrElse<Self, F, E> where
F: FnOnce(Self::Ok) -> T,
E: FnOnce(Self::Error) -> T,
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F: FnOnce(Self::Ok) -> T,
E: FnOnce(Self::Error) -> T,
pub fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
F: FnOnce(Self::Error) -> E,
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F: FnOnce(Self::Error) -> E,
pub fn err_into<E>(self) -> ErrInto<Self, E> where
Self::Error: Into<E>,
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Self::Error: Into<E>,
pub fn ok_into<U>(self) -> OkInto<Self, U> where
Self::Ok: Into<U>,
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Self::Ok: Into<U>,
pub fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where
F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
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F: FnOnce(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
pub fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where
F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
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F: FnOnce(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
pub fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where
F: FnOnce(&Self::Ok),
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F: FnOnce(&Self::Ok),
pub fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnOnce(&Self::Error),
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F: FnOnce(&Self::Error),
pub fn try_flatten(self) -> TryFlatten<Self, Self::Ok> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
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Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
pub fn try_flatten_stream(self) -> TryFlattenStream<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
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Self::Ok: TryStream,
<Self::Ok as TryStream>::Error == Self::Error,
pub fn unwrap_or_else<F>(self, f: F) -> UnwrapOrElse<Self, F> where
F: FnOnce(Self::Error) -> Self::Ok,
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F: FnOnce(Self::Error) -> Self::Ok,
pub fn into_future(self) -> IntoFuture<Self>
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pub fn try_poll_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Result<Self::Ok, Self::Error>> where
Self: Unpin,
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&mut self,
cx: &mut Context<'_>
) -> Poll<Result<Self::Ok, Self::Error>> where
Self: Unpin,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>> + ?Sized,
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S: Stream<Item = Result<T, E>> + ?Sized,
type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
pub fn try_poll_next(
self: Pin<&mut S>,
cx: &mut Context<'_>
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>
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self: Pin<&mut S>,
cx: &mut Context<'_>
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>
impl<S> TryStreamExt for S where
S: TryStream + ?Sized,
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S: TryStream + ?Sized,
pub fn err_into<E>(self) -> ErrInto<Self, E> where
Self::Error: Into<E>,
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Self::Error: Into<E>,
pub fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where
F: FnMut(Self::Ok) -> T,
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F: FnMut(Self::Ok) -> T,
pub fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where
F: FnMut(Self::Error) -> E,
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F: FnMut(Self::Error) -> E,
pub fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F> where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
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F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Error = Self::Error>,
pub fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F> where
F: FnMut(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
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F: FnMut(Self::Error) -> Fut,
Fut: TryFuture<Ok = Self::Ok>,
pub fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F> where
F: FnMut(&Self::Ok),
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F: FnMut(&Self::Ok),
pub fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnMut(&Self::Error),
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F: FnMut(&Self::Error),
pub fn into_stream(self) -> IntoStream<Self>
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pub fn try_next(&mut self) -> TryNext<'_, Self> where
Self: Unpin,
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Self: Unpin,
pub fn try_for_each<Fut, F>(self, f: F) -> TryForEach<Self, Fut, F> where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = Self::Error>,
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F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = (), Error = Self::Error>,
pub fn try_skip_while<Fut, F>(self, f: F) -> TrySkipWhile<Self, Fut, F> where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
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F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
pub fn try_take_while<Fut, F>(self, f: F) -> TryTakeWhile<Self, Fut, F> where
F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
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F: FnMut(&Self::Ok) -> Fut,
Fut: TryFuture<Ok = bool, Error = Self::Error>,
pub fn try_for_each_concurrent<Fut, F>(
self,
limit: impl Into<Option<usize>>,
f: F
) -> TryForEachConcurrent<Self, Fut, F> where
F: FnMut(Self::Ok) -> Fut,
Fut: Future<Output = Result<(), Self::Error>>,
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self,
limit: impl Into<Option<usize>>,
f: F
) -> TryForEachConcurrent<Self, Fut, F> where
F: FnMut(Self::Ok) -> Fut,
Fut: Future<Output = Result<(), Self::Error>>,
pub fn try_collect<C>(self) -> TryCollect<Self, C> where
C: Default + Extend<Self::Ok>,
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C: Default + Extend<Self::Ok>,
pub fn try_filter<Fut, F>(self, f: F) -> TryFilter<Self, Fut, F> where
F: FnMut(&Self::Ok) -> Fut,
Fut: Future<Output = bool>,
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F: FnMut(&Self::Ok) -> Fut,
Fut: Future<Output = bool>,
pub fn try_filter_map<Fut, F, T>(self, f: F) -> TryFilterMap<Self, Fut, F> where
F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = Option<T>, Error = Self::Error>,
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F: FnMut(Self::Ok) -> Fut,
Fut: TryFuture<Ok = Option<T>, Error = Self::Error>,
pub fn try_flatten(self) -> TryFlatten<Self> where
Self::Ok: TryStream,
<Self::Ok as TryStream>::Error: From<Self::Error>,
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Self::Ok: TryStream,
<Self::Ok as TryStream>::Error: From<Self::Error>,
pub fn try_fold<T, Fut, F>(self, init: T, f: F) -> TryFold<Self, Fut, T, F> where
F: FnMut(T, Self::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = Self::Error>,
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F: FnMut(T, Self::Ok) -> Fut,
Fut: TryFuture<Ok = T, Error = Self::Error>,
pub fn try_concat(self) -> TryConcat<Self> where
Self::Ok: Extend<<Self::Ok as IntoIterator>::Item>,
Self::Ok: IntoIterator,
Self::Ok: Default,
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Self::Ok: Extend<<Self::Ok as IntoIterator>::Item>,
Self::Ok: IntoIterator,
Self::Ok: Default,
pub fn try_buffer_unordered(self, n: usize) -> TryBufferUnordered<Self> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
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Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
pub fn try_buffered(self, n: usize) -> TryBuffered<Self> where
Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
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Self::Ok: TryFuture,
<Self::Ok as TryFuture>::Error == Self::Error,
pub fn try_poll_next_unpin(
&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Result<Self::Ok, Self::Error>>> where
Self: Unpin,
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&mut self,
cx: &mut Context<'_>
) -> Poll<Option<Result<Self::Ok, Self::Error>>> where
Self: Unpin,
pub fn into_async_read(self) -> IntoAsyncRead<Self> where
Self: TryStreamExt<Error = Error> + Unpin,
Self::Ok: AsRef<[u8]>,
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Self: TryStreamExt<Error = Error> + Unpin,
Self::Ok: AsRef<[u8]>,