async_utils::stream

Struct Tagged

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pub struct Tagged<K, St> { /* private fields */ }
Expand description

A Stream where each yielded item is tagged with a uniform key Items yielded are (K, St::Item)

Tagged streams can be easily created by using the .tagged() function on the WithTag trait. The stream produced by: stream.tagged(k) is equivalent to that created by stream.map(move |v|, (k.clone(), v) BUT the Tagged type combinator provides a statically nameable type that can easily be expressed in type signatures such as IndexedStreams below.

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impl<K: Clone, St> Tagged<K, St>

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pub fn tag(&self) -> K

Get a clone of the tag associated with this Stream.

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impl<K: Clone, Fut: Future> Future for Tagged<K, Fut>

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type Output = (K, <Fut as Future>::Output)

The type of value produced on completion.
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
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impl<K: Clone, St: Stream> Stream for Tagged<K, St>

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type Item = (K, <St as Stream>::Item)

Values yielded by the stream.
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fn poll_next( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more
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fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more
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impl<'pin, K, St> Unpin for Tagged<K, St>
where __Tagged<'pin, K, St>: Unpin,

Auto Trait Implementations§

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impl<K, St> Freeze for Tagged<K, St>
where K: Freeze, St: Freeze,

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impl<K, St> RefUnwindSafe for Tagged<K, St>
where K: RefUnwindSafe, St: RefUnwindSafe,

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impl<K, St> Send for Tagged<K, St>
where K: Send, St: Send,

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impl<K, St> Sync for Tagged<K, St>
where K: Sync, St: Sync,

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impl<K, St> UnwindSafe for Tagged<K, St>
where K: UnwindSafe, St: UnwindSafe,

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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<T> Borrow<T> for T
where T: ?Sized,

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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,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<F> FutureExt for F
where F: Future + ?Sized,

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fn poll(&mut self, cx: &mut Context<'_>) -> Poll<Self::Output>
where Self: Unpin,

A convenience for calling Future::poll() on !Unpin types.
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fn or<F>(self, other: F) -> Or<Self, F>
where Self: Sized, F: Future<Output = Self::Output>,

Returns the result of self or other future, preferring self if both are ready. Read more
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fn race<F>(self, other: F) -> Race<Self, F>
where Self: Sized, F: Future<Output = Self::Output>,

Returns the result of self or other future, with no preference if both are ready. Read more
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fn catch_unwind(self) -> CatchUnwind<Self>
where Self: Sized + UnwindSafe,

Catches panics while polling the future. Read more
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fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + Send + 'a>>
where Self: Sized + Send + 'a,

Boxes the future and changes its type to dyn Future + Send + 'a. Read more
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fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>>
where Self: Sized + 'a,

Boxes the future and changes its type to dyn Future + 'a. Read more
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impl<T> FutureExt for T
where T: Future + ?Sized,

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fn map<U, F>(self, f: F) -> Map<Self, F>
where F: FnOnce(Self::Output) -> U, Self: Sized,

Map this future’s output to a different type, returning a new future of the resulting type. Read more
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fn map_into<U>(self) -> MapInto<Self, U>
where Self::Output: Into<U>, Self: Sized,

Map this future’s output to a different type, returning a new future of the resulting type. Read more
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fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F>
where F: FnOnce(Self::Output) -> Fut, Fut: Future, Self: Sized,

Chain on a computation for when a future finished, passing the result of the future to the provided closure f. Read more
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fn left_future<B>(self) -> Either<Self, B>
where B: Future<Output = Self::Output>, Self: Sized,

Wrap this future in an Either future, making it the left-hand variant of that Either. Read more
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fn right_future<A>(self) -> Either<A, Self>
where A: Future<Output = Self::Output>, Self: Sized,

Wrap this future in an Either future, making it the right-hand variant of that Either. Read more
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fn into_stream(self) -> IntoStream<Self>
where Self: Sized,

Convert this future into a single element stream. Read more
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fn flatten(self) -> Flatten<Self>
where Self::Output: Future, Self: Sized,

Flatten the execution of this future when the output of this future is itself another future. Read more
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fn flatten_stream(self) -> FlattenStream<Self>
where Self::Output: Stream, Self: Sized,

Flatten the execution of this future when the successful result of this future is a stream. Read more
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fn fuse(self) -> Fuse<Self>
where Self: Sized,

Fuse a future such that poll will never again be called once it has completed. This method can be used to turn any Future into a FusedFuture. Read more
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
where F: FnOnce(&Self::Output), Self: Sized,

Do something with the output of a future before passing it on. Read more
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fn catch_unwind(self) -> CatchUnwind<Self>
where Self: Sized + UnwindSafe,

Catches unwinding panics while polling the future. Read more
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fn shared(self) -> Shared<Self>
where Self: Sized, Self::Output: Clone,

Create a cloneable handle to this future where all handles will resolve to the same result. Read more
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fn remote_handle(self) -> (Remote<Self>, RemoteHandle<Self::Output>)
where Self: Sized,

Turn this future into a future that yields () on completion and sends its output to another future on a separate task. Read more
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fn boxed<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + Send + 'a>>
where Self: Sized + Send + 'a,

Wrap the future in a Box, pinning it. Read more
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fn boxed_local<'a>(self) -> Pin<Box<dyn Future<Output = Self::Output> + 'a>>
where Self: Sized + 'a,

Wrap the future in a Box, pinning it. Read more
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fn unit_error(self) -> UnitError<Self>
where Self: Sized,

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = ()>.
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fn never_error(self) -> NeverError<Self>
where Self: Sized,

Turns a Future<Output = T> into a TryFuture<Ok = T, Error = Never>.
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fn poll_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Self::Output>
where Self: Unpin,

A convenience for calling Future::poll on Unpin future types.
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fn now_or_never(self) -> Option<Self::Output>
where Self: Sized,

Evaluates and consumes the future, returning the resulting output if the future is ready after the first call to Future::poll. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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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<F> IntoFuture for F
where F: Future,

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type Output = <F as Future>::Output

The output that the future will produce on completion.
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type IntoFuture = F

Which kind of future are we turning this into?
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fn into_future(self) -> <F as IntoFuture>::IntoFuture

Creates a future from a value. Read more
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<S> StreamExt for S
where S: Stream + ?Sized,

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fn poll_next(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>>
where Self: Unpin,

A convenience for calling [Stream::poll_next()] on !Unpin types.
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fn next(&mut self) -> NextFuture<'_, Self>
where Self: Unpin,

Retrieves the next item in the stream. Read more
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fn try_next<T, E>(&mut self) -> TryNextFuture<'_, Self>
where Self: Stream<Item = Result<T, E>> + Unpin,

Retrieves the next item in the stream. Read more
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fn count(self) -> CountFuture<Self>
where Self: Sized,

Counts the number of items in the stream. Read more
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fn map<T, F>(self, f: F) -> Map<Self, F>
where Self: Sized, F: FnMut(Self::Item) -> T,

Maps items of the stream to new values using a closure. Read more
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fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
where Self: Sized, U: Stream, F: FnMut(Self::Item) -> U,

Maps items to streams and then concatenates them. Read more
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fn flatten(self) -> Flatten<Self>
where Self: Sized, Self::Item: Stream,

Concatenates inner streams. Read more
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fn then<F, Fut>(self, f: F) -> Then<Self, F, Fut>
where Self: Sized, F: FnMut(Self::Item) -> Fut, Fut: Future,

Maps items of the stream to new values using an async closure. Read more
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fn filter<P>(self, predicate: P) -> Filter<Self, P>
where Self: Sized, P: FnMut(&Self::Item) -> bool,

Keeps items of the stream for which predicate returns true. Read more
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fn filter_map<T, F>(self, f: F) -> FilterMap<Self, F>
where Self: Sized, F: FnMut(Self::Item) -> Option<T>,

Filters and maps items of the stream using a closure. Read more
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fn take(self, n: usize) -> Take<Self>
where Self: Sized,

Takes only the first n items of the stream. Read more
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fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
where Self: Sized, P: FnMut(&Self::Item) -> bool,

Takes items while predicate returns true. Read more
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fn skip(self, n: usize) -> Skip<Self>
where Self: Sized,

Skips the first n items of the stream. Read more
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fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>
where Self: Sized, P: FnMut(&Self::Item) -> bool,

Skips items while predicate returns true. Read more
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fn step_by(self, step: usize) -> StepBy<Self>
where Self: Sized,

Yields every stepth item. Read more
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fn chain<U>(self, other: U) -> Chain<Self, U>
where Self: Sized, U: Stream<Item = Self::Item>,

Appends another stream to the end of this one. Read more
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fn cloned<'a, T>(self) -> Cloned<Self>
where Self: Sized + Stream<Item = &'a T>, T: Clone + 'a,

Clones all items. Read more
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fn copied<'a, T>(self) -> Copied<Self>
where Self: Sized + Stream<Item = &'a T>, T: Copy + 'a,

Copies all items. Read more
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fn collect<C>(self) -> CollectFuture<Self, C>
where Self: Sized, C: Default + Extend<Self::Item>,

Collects all items in the stream into a collection. Read more
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fn try_collect<T, E, C>(self) -> TryCollectFuture<Self, C>
where Self: Sized + Stream<Item = Result<T, E>>, C: Default + Extend<T>,

Collects all items in the fallible stream into a collection. Read more
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fn partition<B, P>(self, predicate: P) -> PartitionFuture<Self, P, B>
where Self: Sized, B: Default + Extend<Self::Item>, P: FnMut(&Self::Item) -> bool,

Partitions items into those for which predicate is true and those for which it is false, and then collects them into two collections. Read more
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fn fold<T, F>(self, init: T, f: F) -> FoldFuture<Self, F, T>
where Self: Sized, F: FnMut(T, Self::Item) -> T,

Accumulates a computation over the stream. Read more
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fn try_fold<T, E, F, B>( &mut self, init: B, f: F, ) -> TryFoldFuture<'_, Self, F, B>
where Self: Sized + Stream<Item = Result<T, E>> + Unpin, F: FnMut(B, T) -> Result<B, E>,

Accumulates a fallible computation over the stream. Read more
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fn scan<St, B, F>(self, initial_state: St, f: F) -> Scan<Self, St, F>
where Self: Sized, F: FnMut(&mut St, Self::Item) -> Option<B>,

Maps items of the stream to new values using a state value and a closure. Read more
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fn fuse(self) -> Fuse<Self>
where Self: Sized,

Fuses the stream so that it stops yielding items after the first None. Read more
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fn cycle(self) -> Cycle<Self>
where Self: Sized + Clone,

Repeats the stream from beginning to end, forever. Read more
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fn enumerate(self) -> Enumerate<Self>
where Self: Sized,

Enumerates items, mapping them to (index, item). Read more
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
where Self: Sized, F: FnMut(&Self::Item),

Calls a closure on each item and passes it on. Read more
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fn nth(&mut self, n: usize) -> NthFuture<'_, Self>
where Self: Unpin,

Gets the nth item of the stream. Read more
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fn last(self) -> LastFuture<Self>
where Self: Sized,

Returns the last item in the stream. Read more
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fn find<P>(&mut self, predicate: P) -> FindFuture<'_, Self, P>
where Self: Unpin, P: FnMut(&Self::Item) -> bool,

Finds the first item of the stream for which predicate returns true. Read more
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fn find_map<F, B>(&mut self, f: F) -> FindMapFuture<'_, Self, F>
where Self: Unpin, F: FnMut(Self::Item) -> Option<B>,

Applies a closure to items in the stream and returns the first Some result. Read more
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fn position<P>(&mut self, predicate: P) -> PositionFuture<'_, Self, P>
where Self: Unpin, P: FnMut(Self::Item) -> bool,

Finds the index of the first item of the stream for which predicate returns true. Read more
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fn all<P>(&mut self, predicate: P) -> AllFuture<'_, Self, P>
where Self: Unpin, P: FnMut(Self::Item) -> bool,

Tests if predicate returns true for all items in the stream. Read more
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fn any<P>(&mut self, predicate: P) -> AnyFuture<'_, Self, P>
where Self: Unpin, P: FnMut(Self::Item) -> bool,

Tests if predicate returns true for any item in the stream. Read more
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fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>
where Self: Sized, F: FnMut(Self::Item),

Calls a closure on each item of the stream. Read more
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fn try_for_each<F, E>(&mut self, f: F) -> TryForEachFuture<'_, Self, F>
where Self: Unpin, F: FnMut(Self::Item) -> Result<(), E>,

Calls a fallible closure on each item of the stream, stopping on first error. Read more
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fn zip<U>(self, other: U) -> Zip<Self, U>
where Self: Sized, U: Stream,

Zips up two streams into a single stream of pairs. Read more
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fn unzip<A, B, FromA, FromB>(self) -> UnzipFuture<Self, FromA, FromB>
where FromA: Default + Extend<A>, FromB: Default + Extend<B>, Self: Sized + Stream<Item = (A, B)>,

Collects a stream of pairs into a pair of collections. Read more
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fn or<S>(self, other: S) -> Or<Self, S>
where Self: Sized, S: Stream<Item = Self::Item>,

Merges with other stream, preferring items from self whenever both streams are ready. Read more
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fn race<S>(self, other: S) -> Race<Self, S>
where Self: Sized, S: Stream<Item = Self::Item>,

Merges with other stream, with no preference for either stream when both are ready. Read more
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fn boxed<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a>>
where Self: Sized + Send + 'a,

Boxes the stream and changes its type to dyn Stream + Send + 'a. Read more
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fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a>>
where Self: Sized + 'a,

Boxes the stream and changes its type to dyn Stream + 'a. Read more
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impl<T> StreamExt for T
where T: Stream + ?Sized,

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fn next(&mut self) -> Next<'_, Self>
where Self: Unpin,

Creates a future that resolves to the next item in the stream. Read more
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fn into_future(self) -> StreamFuture<Self>
where Self: Sized + Unpin,

Converts this stream into a future of (next_item, tail_of_stream). If the stream terminates, then the next item is None. Read more
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fn map<T, F>(self, f: F) -> Map<Self, F>
where F: FnMut(Self::Item) -> T, Self: Sized,

Maps this stream’s items to a different type, returning a new stream of the resulting type. Read more
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fn enumerate(self) -> Enumerate<Self>
where Self: Sized,

Creates a stream which gives the current iteration count as well as the next value. Read more
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fn filter<Fut, F>(self, f: F) -> Filter<Self, Fut, F>
where F: FnMut(&Self::Item) -> Fut, Fut: Future<Output = bool>, Self: Sized,

Filters the values produced by this stream according to the provided asynchronous predicate. Read more
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fn filter_map<Fut, T, F>(self, f: F) -> FilterMap<Self, Fut, F>
where F: FnMut(Self::Item) -> Fut, Fut: Future<Output = Option<T>>, Self: Sized,

Filters the values produced by this stream while simultaneously mapping them to a different type according to the provided asynchronous closure. Read more
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fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F>
where F: FnMut(Self::Item) -> Fut, Fut: Future, Self: Sized,

Computes from this stream’s items new items of a different type using an asynchronous closure. Read more
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fn collect<C>(self) -> Collect<Self, C>
where C: Default + Extend<Self::Item>, Self: Sized,

Transforms a stream into a collection, returning a future representing the result of that computation. Read more
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fn unzip<A, B, FromA, FromB>(self) -> Unzip<Self, FromA, FromB>
where FromA: Default + Extend<A>, FromB: Default + Extend<B>, Self: Sized + Stream<Item = (A, B)>,

Converts a stream of pairs into a future, which resolves to pair of containers. Read more
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fn concat(self) -> Concat<Self>
where Self: Sized, Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default,

Concatenate all items of a stream into a single extendable destination, returning a future representing the end result. Read more
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fn count(self) -> Count<Self>
where Self: Sized,

Drives the stream to completion, counting the number of items. Read more
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fn cycle(self) -> Cycle<Self>
where Self: Sized + Clone,

Repeats a stream endlessly. Read more
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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>, Self: Sized,

Execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more
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fn any<Fut, F>(self, f: F) -> Any<Self, Fut, F>
where F: FnMut(Self::Item) -> Fut, Fut: Future<Output = bool>, Self: Sized,

Execute predicate over asynchronous stream, and return true if any element in stream satisfied a predicate. Read more
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fn all<Fut, F>(self, f: F) -> All<Self, Fut, F>
where F: FnMut(Self::Item) -> Fut, Fut: Future<Output = bool>, Self: Sized,

Execute predicate over asynchronous stream, and return true if all element in stream satisfied a predicate. Read more
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fn flatten(self) -> Flatten<Self>
where Self::Item: Stream, Self: Sized,

Flattens a stream of streams into just one continuous stream. Read more
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fn flatten_unordered( self, limit: impl Into<Option<usize>>, ) -> FlattenUnorderedWithFlowController<Self, ()>
where Self::Item: Stream + Unpin, Self: Sized,

Flattens a stream of streams into just one continuous stream. Polls inner streams produced by the base stream concurrently. Read more
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fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
where F: FnMut(Self::Item) -> U, U: Stream, Self: Sized,

Maps a stream like [StreamExt::map] but flattens nested Streams. Read more
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fn flat_map_unordered<U, F>( self, limit: impl Into<Option<usize>>, f: F, ) -> FlatMapUnordered<Self, U, F>
where U: Stream + Unpin, F: FnMut(Self::Item) -> U, Self: Sized,

Maps a stream like [StreamExt::map] but flattens nested Streams and polls them concurrently, yielding items in any order, as they made available. Read more
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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>>, Self: Sized,

Combinator similar to [StreamExt::fold] that holds internal state and produces a new stream. Read more
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fn skip_while<Fut, F>(self, f: F) -> SkipWhile<Self, Fut, F>
where F: FnMut(&Self::Item) -> Fut, Fut: Future<Output = bool>, Self: Sized,

Skip elements on this stream while the provided asynchronous predicate resolves to true. Read more
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fn take_while<Fut, F>(self, f: F) -> TakeWhile<Self, Fut, F>
where F: FnMut(&Self::Item) -> Fut, Fut: Future<Output = bool>, Self: Sized,

Take elements from this stream while the provided asynchronous predicate resolves to true. Read more
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fn take_until<Fut>(self, fut: Fut) -> TakeUntil<Self, Fut>
where Fut: Future, Self: Sized,

Take elements from this stream until the provided future resolves. Read more
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fn for_each<Fut, F>(self, f: F) -> ForEach<Self, Fut, F>
where F: FnMut(Self::Item) -> Fut, Fut: Future<Output = ()>, Self: Sized,

Runs this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
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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 = ()>, Self: Sized,

Runs this stream to completion, executing the provided asynchronous closure for each element on the stream concurrently as elements become available. Read more
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fn take(self, n: usize) -> Take<Self>
where Self: Sized,

Creates a new stream of at most n items of the underlying stream. Read more
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fn skip(self, n: usize) -> Skip<Self>
where Self: Sized,

Creates a new stream which skips n items of the underlying stream. Read more
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fn fuse(self) -> Fuse<Self>
where Self: Sized,

Fuse a stream such that poll_next will never again be called once it has finished. This method can be used to turn any Stream into a FusedStream. Read more
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fn by_ref(&mut self) -> &mut Self

Borrows a stream, rather than consuming it. Read more
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fn catch_unwind(self) -> CatchUnwind<Self>
where Self: Sized + UnwindSafe,

Catches unwinding panics while polling the stream. Read more
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fn boxed<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a>>
where Self: Sized + Send + 'a,

Wrap the stream in a Box, pinning it. Read more
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fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a>>
where Self: Sized + 'a,

Wrap the stream in a Box, pinning it. Read more
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fn buffered(self, n: usize) -> Buffered<Self>
where Self::Item: Future, Self: Sized,

An adaptor for creating a buffered list of pending futures. Read more
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fn buffer_unordered(self, n: usize) -> BufferUnordered<Self>
where Self::Item: Future, Self: Sized,

An adaptor for creating a buffered list of pending futures (unordered). Read more
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fn zip<St>(self, other: St) -> Zip<Self, St>
where St: Stream, Self: Sized,

An adapter for zipping two streams together. Read more
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fn chain<St>(self, other: St) -> Chain<Self, St>
where St: Stream<Item = Self::Item>, Self: Sized,

Adapter for chaining two streams. Read more
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fn peekable(self) -> Peekable<Self>
where Self: Sized,

Creates a new stream which exposes a peek method. Read more
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fn chunks(self, capacity: usize) -> Chunks<Self>
where Self: Sized,

An adaptor for chunking up items of the stream inside a vector. Read more
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fn ready_chunks(self, capacity: usize) -> ReadyChunks<Self>
where Self: Sized,

An adaptor for chunking up ready items of the stream inside a vector. Read more
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fn forward<S>(self, sink: S) -> Forward<Self, S>
where S: Sink<Self::Ok, Error = Self::Error>, Self: Sized + TryStream,

A future that completes after the given stream has been fully processed into the sink and the sink has been flushed and closed. Read more
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fn split<Item>(self) -> (SplitSink<Self, Item>, SplitStream<Self>)
where Self: Sized + Sink<Item>,

Splits this Stream + Sink object into separate Sink and Stream objects. Read more
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
where F: FnMut(&Self::Item), Self: Sized,

Do something with each item of this stream, afterwards passing it on. Read more
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fn left_stream<B>(self) -> Either<Self, B>
where B: Stream<Item = Self::Item>, Self: Sized,

Wrap this stream in an Either stream, making it the left-hand variant of that Either. Read more
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fn right_stream<B>(self) -> Either<B, Self>
where B: Stream<Item = Self::Item>, Self: Sized,

Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more
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fn poll_next_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>>
where Self: Unpin,

A convenience method for calling [Stream::poll_next] on Unpin stream types.
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fn select_next_some(&mut self) -> SelectNextSome<'_, Self>
where Self: Unpin + FusedStream,

Returns a Future that resolves when the next item in this stream is ready. Read more
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impl<F> TimeoutExt for F
where F: Future,

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fn on_timeout<WT, OT>(self, time: WT, on_timeout: OT) -> OnTimeout<Self, OT>
where WT: WakeupTime, OT: FnOnce() -> Self::Output,

Wraps the future in a timeout, calling on_timeout to produce a result when the timeout occurs.
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fn on_stalled<OS>( self, timeout: Duration, on_stalled: OS, ) -> OnStalled<Self, OS>
where OS: FnOnce() -> Self::Output,

Wraps the future in a stall-guard, calling on_stalled to produce a result when the future hasn’t been otherwise polled within the timeout. This is a heuristic - spurious wakeups will keep the detection from triggering, and moving all work to external tasks or threads with force the triggering early.
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithEpitaph for T
where T: Stream,

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fn with_epitaph<E>(self, epitaph: E) -> StreamWithEpitaph<T, E>

Map this stream to one producing a StreamItem::Item value for each item of the stream followed by a single StreamItem::Epitaph value with the provided epitaph.
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impl<St> WithTag for St

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fn tagged<T>(self, tag: T) -> Tagged<T, St> ⓘ

Produce a new stream from this one which yields item tupled with a constant tag