Shared

par_stream

Struct Shared 

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pub struct Shared<St>
where
    St: ?Sized + Stream,
{ /* private fields */ }
Expand description

Stream for the shared method.

The stream is cloneable. Polling the stream will poll the internal stream shared with the other owners. If there are multiple consumers for the shared stream, the items are sent in first-come-first-serve manner.

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impl<St: Stream> Shared<St>

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pub fn new(stream: St) -> Self

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impl<St> Shared<St>
where St: Stream,

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pub fn downgrade(&self) -> Option<WeakShared<St>>

Creates a new WeakShared for this Shared.

Returns None if it has already been polled to completion.

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pub fn strong_count(&self) -> Option<usize>

Gets the number of strong pointers to this allocation.

Returns None if it has already been polled to completion.

§Safety

This method by itself is safe, but using it correctly requires extra care. Another thread can change the strong count at any time, including potentially between calling this method and acting on the result.

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pub fn weak_count(&self) -> Option<usize>

Gets the number of weak pointers to this allocation.

Returns None if it has already been polled to completion.

§Safety

This method by itself is safe, but using it correctly requires extra care. Another thread can change the weak count at any time, including potentially between calling this method and acting on the result.

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impl<St> Clone for Shared<St>
where St: Stream,

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<St: Stream> Debug for Shared<St>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<St> Drop for Shared<St>
where St: ?Sized + Stream,

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl<St> FusedStream for Shared<St>
where St: Stream,

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fn is_terminated(&self) -> bool

Returns true if the stream should no longer be polled.
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impl<St> Stream for Shared<St>
where St: Stream,

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type Item = <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<St: Stream> Unpin for Shared<St>

Auto Trait Implementations§

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impl<St> Freeze for Shared<St>
where St: ?Sized,

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impl<St> !RefUnwindSafe for Shared<St>

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impl<St> Send for Shared<St>
where St: Send, <St as Stream>::Item: Send,

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impl<St> Sync for Shared<St>
where St: Send, <St as Stream>::Item: Send,

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impl<St> !UnwindSafe for Shared<St>

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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<S, T> IndexStreamExt for S
where S: Stream<Item = (usize, T)>,

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type IndexedItem = T

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fn reorder_enumerated( self, ) -> ReorderEnumerated<S, <S as IndexStreamExt>::IndexedItem>

Reorders the input items (index, item) according to the index number and returns item. 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<I> IntoStream for I
where I: Stream,

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type Item = <I as Stream>::Item

The type of the elements being iterated over.
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type IntoStream = I

Which kind of stream are we turning this into?
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fn into_stream(self) -> I

Creates a stream from a value.
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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,

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fn shared(self) -> Shared<S>

Creates a shareable stream that can clone the ownership of the stream. Read more
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fn with_state<B>(self, init: B) -> Zip<S, StateStream<B>>

Binds the stream with a state value. Read more
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fn reduce<F, Fut>(self, f: F) -> Reduce<S, F, Fut>

Reduces the stream items into a single value. Read more
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fn wait_until<Fut>(self, fut: Fut) -> WaitUntil<S, Fut>
where Fut: Future<Output = bool>,

Take elements after the provided future resolves to true, otherwise fuse the stream. Read more
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fn batching<T, F, Fut>(self, f: F) -> Batching<S, T, F, Fut>

The combinator consumes as many items from the stream as it likes for each output item. Read more
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fn stateful_batching<T, B, F, Fut>( self, init: B, f: F, ) -> StatefulBatching<S, B, T, F, Fut>
where S: Stream, F: FnMut(B, S) -> Fut, Fut: Future<Output = Option<(T, B, S)>>,

Similar to batching but with a state. Read more
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fn stateful_then<T, B, F, Fut>( self, init: B, f: F, ) -> StatefulThen<S, B, T, F, Fut>
where S: Stream, F: FnMut(B, <S as Stream>::Item) -> Fut, Fut: Future<Output = Option<(B, T)>>,

Similar to then but with a state.
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fn stateful_map<T, B, F>(self, init: B, f: F) -> StatefulMap<S, B, T, F>
where S: Stream, F: FnMut(B, <S as Stream>::Item) -> Option<(B, T)>,

Similar to map but with a state.
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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 map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>
where Self: Sized, P: FnMut(Self::Item) -> Option<B>,

Maps items while predicate returns Some. 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 drain(&mut self) -> Drain<'_, Self>

Yields all immediately available values from a 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,

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<T> StreamExt for T
where T: Stream + ?Sized,

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

Advances the stream and returns the next value. Read more
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fn take(self, n: usize) -> Take<Self>
where Self: Sized,

Creates a stream that yields its first n elements. Read more
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fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>
where Self: Sized, P: FnMut(&Self::Item) -> bool,

Creates a stream that yields elements based on a predicate. Read more
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fn throttle(self, d: Duration) -> Throttle<Self>
where Self: Sized,

Limit the amount of items yielded per timeslice in a stream. Read more
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fn step_by(self, step: usize) -> StepBy<Self>
where Self: Sized,

Creates a stream that yields each stepth element. Read more
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fn chain<U>(self, other: U) -> Chain<Self, U>
where Self: Sized, U: Stream<Item = Self::Item>,

Takes two streams and creates a new stream over both in sequence. Read more
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fn cloned<'a, T>(self) -> Cloned<Self>
where Self: Sized + Stream<Item = &'a T>, T: Clone + 'a,

Creates an stream which copies all of its elements. Read more
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fn copied<'a, T>(self) -> Copied<Self>
where Self: Sized + Stream<Item = &'a T>, T: Copy + 'a,

Creates an stream which copies all of its elements. Read more
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fn cycle(self) -> Cycle<Self>
where Self: Sized + Clone,

Creates a stream that yields the provided values infinitely and in order. Read more
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fn enumerate(self) -> Enumerate<Self>
where Self: Sized,

Creates a stream that gives the current element’s count as well as the next value. Read more
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fn delay(self, dur: Duration) -> Delay<Self>
where Self: Sized,

Creates a stream that is delayed before it starts yielding items. Read more
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fn map<B, F>(self, f: F) -> Map<Self, F>
where Self: Sized, F: FnMut(Self::Item) -> B,

Takes a closure and creates a stream that calls that closure on every element of this stream. Read more
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fn inspect<F>(self, f: F) -> Inspect<Self, F>
where Self: Sized, F: FnMut(&Self::Item),

A combinator that does something with each element in the stream, passing the value on. Read more
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fn last(self) -> LastFuture<Self, Self::Item>
where Self: Sized,

Returns the last element of the stream. Read more
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fn fuse(self) -> Fuse<Self>
where Self: Sized,

Creates a stream which ends after the first None. Read more
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fn filter<P>(self, predicate: P) -> Filter<Self, P>
where Self: Sized, P: FnMut(&Self::Item) -> bool,

Creates a stream that uses a predicate to determine if an element should be yielded. Read more
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fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>
where Self: Sized, U: IntoStream, F: FnMut(Self::Item) -> U,

Creates an stream that works like map, but flattens nested structure. Read more
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fn flatten(self) -> Flatten<Self>
where Self: Sized, Self::Item: IntoStream,

Creates an stream that flattens nested structure. Read more
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fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>
where Self: Sized, F: FnMut(Self::Item) -> Option<B>,

Both filters and maps a stream. Read more
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fn min_by_key<B, F>(self, key_by: F) -> MinByKeyFuture<Self, Self::Item, F>
where Self: Sized, B: Ord, F: FnMut(&Self::Item) -> B,

Returns the element that gives the minimum value with respect to the specified key function. If several elements are equally minimum, the first element is returned. If the stream is empty, None is returned. Read more
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fn max_by_key<B, F>(self, key_by: F) -> MaxByKeyFuture<Self, Self::Item, F>
where Self: Sized, B: Ord, F: FnMut(&Self::Item) -> B,

Returns the element that gives the maximum value with respect to the specified key function. If several elements are equally maximum, the first element is returned. If the stream is empty, None is returned. Read more
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fn min_by<F>(self, compare: F) -> MinByFuture<Self, F, Self::Item>
where Self: Sized, F: FnMut(&Self::Item, &Self::Item) -> Ordering,

Returns the element that gives the minimum value with respect to the specified comparison function. If several elements are equally minimum, the first element is returned. If the stream is empty, None is returned. Read more
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fn max(self) -> MaxFuture<Self, Self::Item>
where Self: Sized, Self::Item: Ord,

Returns the element that gives the maximum value. If several elements are equally maximum, the first element is returned. If the stream is empty, None is returned. Read more
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fn min(self) -> MinFuture<Self, Self::Item>
where Self: Sized, Self::Item: Ord,

Returns the element that gives the minimum value. If several elements are equally minimum, the first element is returned. If the stream is empty, None is returned. Read more
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fn max_by<F>(self, compare: F) -> MaxByFuture<Self, F, Self::Item>
where Self: Sized, F: FnMut(&Self::Item, &Self::Item) -> Ordering,

Returns the element that gives the maximum value with respect to the specified comparison function. If several elements are equally maximum, the first element is returned. If the stream is empty, None is returned. Read more
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fn nth(&mut self, n: usize) -> NthFuture<'_, Self>
where Self: Sized + Unpin,

Returns the nth element of the stream. Read more
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fn all<F>(&mut self, f: F) -> AllFuture<'_, Self, F, Self::Item>
where Self: Sized + Unpin, F: FnMut(Self::Item) -> bool,

Tests if every element of the stream matches a predicate. Read more
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fn find<P>(&mut self, p: P) -> FindFuture<'_, Self, P>
where Self: Sized + Unpin, P: FnMut(&Self::Item) -> bool,

Searches for an element in a stream that satisfies a predicate. Read more
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fn find_map<F, B>(&mut self, f: F) -> FindMapFuture<'_, Self, F>
where Self: Sized + Unpin, F: FnMut(Self::Item) -> Option<B>,

Applies function to the elements of stream and returns the first non-none result. Read more
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fn fold<B, F>(self, init: B, f: F) -> FoldFuture<Self, F, B>
where Self: Sized, F: FnMut(B, Self::Item) -> B,

A combinator that applies a function to every element in a stream producing a single, final value. Read more
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fn partition<B, F>(self, f: F) -> PartitionFuture<Self, F, B>
where Self: Sized, F: FnMut(&Self::Item) -> bool, B: Default + Extend<Self::Item>,

A combinator that applies a function to every element in a stream creating two collections from it. Read more
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fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>
where Self: Sized, F: FnMut(Self::Item),

Call a closure on each element of the stream. Read more
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fn any<F>(&mut self, f: F) -> AnyFuture<'_, Self, F, Self::Item>
where Self: Sized + Unpin, F: FnMut(Self::Item) -> bool,

Tests if any element of the stream matches a predicate. Read more
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fn by_ref(&mut self) -> &mut Self

Borrows an stream, rather than consuming it. 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>,

A stream adaptor similar to fold that holds internal state and produces a new 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,

Combinator that skips elements based on a predicate. Read more
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fn skip(self, n: usize) -> Skip<Self>
where Self: Sized,

Creates a combinator that skips the first n elements. Read more
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fn timeout(self, dur: Duration) -> Timeout<Self>
where Self: Sized + Stream,

Await a stream or times out after a duration of time. Read more
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fn try_fold<B, F, T, E>( &mut self, init: T, f: F, ) -> TryFoldFuture<'_, Self, F, T>
where Self: Sized + Unpin, F: FnMut(B, Self::Item) -> Result<T, E>,

A combinator that applies a function as long as it returns successfully, producing a single, final value. Immediately returns the error when the function returns unsuccessfully. Read more
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fn try_for_each<F, E>(&mut self, f: F) -> TryForEachFuture<'_, Self, F>
where Self: Sized + Unpin, F: FnMut(Self::Item) -> Result<(), E>,

Applies a falliable function to each element in a stream, stopping at first error and returning it. 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)>,

Converts an stream of pairs into a pair of containers. Read more
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fn collect<'a, B>(self) -> Pin<Box<dyn Future<Output = B> + Send + 'a>>
where Self: Sized + 'a + Send, B: FromStream<Self::Item>, Self::Item: Send,

Transforms a stream into a collection. Read more
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fn merge<U>(self, other: U) -> Merge<Self, U>
where Self: Sized, U: Stream<Item = Self::Item>,

Combines multiple streams into a single stream of all their outputs. Read more
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fn partial_cmp<S>(self, other: S) -> PartialCmpFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialOrd<<S as Stream>::Item>,

Lexicographically compares the elements of this Stream with those of another. Read more
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fn position<P>(&mut self, predicate: P) -> PositionFuture<'_, Self, P>
where Self: Sized + Unpin, P: FnMut(Self::Item) -> bool,

Searches for an element in a Stream that satisfies a predicate, returning its index. Read more
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fn cmp<S>(self, other: S) -> CmpFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: Ord,

Lexicographically compares the elements of this Stream with those of another using ‘Ord’. Read more
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fn count(self) -> CountFuture<Self>
where Self: Sized,

Counts the number of elements in the stream. Read more
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fn ne<S>(self, other: S) -> NeFuture<Self, S>
where Self: Sized, S: Stream, Self::Item: PartialEq<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically not equal to those of another. Read more
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fn ge<S>(self, other: S) -> GeFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialOrd<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically greater than or equal to those of another. Read more
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fn eq<S>(self, other: S) -> EqFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialEq<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically equal to those of another. Read more
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fn gt<S>(self, other: S) -> GtFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialOrd<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically greater than those of another. Read more
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fn le<S>(self, other: S) -> LeFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialOrd<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically less or equal to those of another. Read more
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fn lt<S>(self, other: S) -> LtFuture<Self, S>
where Self: Sized + Stream, S: Stream, Self::Item: PartialOrd<<S as Stream>::Item>,

Determines if the elements of this Stream are lexicographically less than those of another. Read more
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fn sum<'a, S>(self) -> Pin<Box<dyn Future<Output = S> + 'a>>
where Self: Sized + Stream<Item = S> + 'a, S: Sum<Self::Item>,

Sums the elements of a stream. Read more
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fn product<'a, P>(self) -> Pin<Box<dyn Future<Output = P> + 'a>>
where Self: Sized + Stream<Item = P> + 'a, P: Product,

Multiplies all elements of the stream. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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<S, T, E> TryIndexStreamExt for S
where S: Stream<Item = Result<(usize, T), E>>,

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type Ok = T

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type Error = E

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fn try_reorder_enumerated(self) -> TryReorderEnumerated<S, T, E>

Reorders the input items Ok((index, item)) according to the index number and returns item. Read more
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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<S, T, E> TryParStreamExt for S
where S: 'static + Send + Stream<Item = Result<T, E>>, T: 'static + Send, E: 'static + Send,

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fn try_map_blocking<B, U, F>( self, buf_size: B, f: F, ) -> RecvStream<'static, Result<U, E>>
where B: Into<BufSize>, U: Send, F: 'static + Send + FnMut(T) -> Result<U, E>,

Fallible stream combinator for map_blocking.
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fn try_par_batching<U, P, F, Fut>( self, params: P, f: F, ) -> TakeUntilError<RecvStream<'static, Result<U, E>>, U, E>
where P: Into<ParParams>, U: 'static + Send, F: 'static + Clone + Send + FnMut(usize, Receiver<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>) -> Fut, Fut: 'static + Future<Output = Result<Option<(U, Receiver<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>)>, <S as TryStream>::Error>> + Send,

Fallible stream combinator for par_batching.
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fn try_par_then<U, P, F, Fut>( self, params: P, f: F, ) -> Pin<Box<dyn Stream<Item = Result<U, E>> + Send>>
where P: Into<ParParams>, U: 'static + Send, F: 'static + FnMut(T) -> Fut + Send, Fut: 'static + Future<Output = Result<U, E>> + Send,

Fallible stream combinator for par_then.
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fn try_par_then_unordered<U, P, F, Fut>( self, params: P, f: F, ) -> Pin<Box<dyn Stream<Item = Result<U, E>> + Send>>
where U: 'static + Send, F: 'static + FnMut(T) -> Fut + Send, Fut: 'static + Future<Output = Result<U, E>> + Send, P: Into<ParParams>,

Fallible stream combinator for par_then_unordered.
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fn try_par_map<U, P, F, Func>( self, params: P, f: F, ) -> Pin<Box<dyn Stream<Item = Result<U, E>> + Send>>
where P: Into<ParParams>, U: 'static + Send, F: 'static + FnMut(T) -> Func + Send, Func: 'static + FnOnce() -> Result<U, E> + Send,

Fallible stream combinator for par_map.
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fn try_par_map_unordered<U, P, F, Func>( self, params: P, f: F, ) -> Pin<Box<dyn Stream<Item = Result<U, E>> + Send>>
where P: Into<ParParams>, U: 'static + Send, F: 'static + FnMut(T) -> Func + Send, Func: 'static + FnOnce() -> Result<U, E> + Send,

Fallible stream combinator for par_map_unordered.
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fn try_par_for_each<P, F, Fut>( self, params: P, f: F, ) -> Pin<Box<dyn Future<Output = Result<(), E>> + Send>>
where P: Into<ParParams>, F: 'static + FnMut(T) -> Fut + Send, Fut: 'static + Future<Output = Result<(), E>> + Send,

Fallible stream combinator for par_for_each.
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fn try_par_for_each_blocking<P, F, Func>( self, params: P, f: F, ) -> Pin<Box<dyn Future<Output = Result<(), E>> + Send>>
where P: Into<ParParams>, F: 'static + FnMut(T) -> Func + Send, Func: 'static + FnOnce() -> Result<(), E> + Send,

Fallible stream combinator for par_for_each_blocking.
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impl<S, T, E> TryStream for S
where S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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type Error = E

The type of failures yielded by this future
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fn try_poll_next( self: Pin<&mut S>, cx: &mut Context<'_>, ) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

Poll this TryStream as if it were a Stream. Read more
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impl<S, T, E> TryStreamExt for S
where S: Stream<Item = Result<T, E>>,

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fn try_enumerate(self) -> TryEnumerate<S, T, E>

Create a fallible stream that gives the current iteration count. Read more
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fn take_until_error(self) -> TakeUntilError<S, T, E>

Takes elements until an Err(_).
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fn try_stateful_then<B, U, F, Fut>( self, init: B, f: F, ) -> TryStatefulThen<S, B, T, U, E, F, Fut>
where F: FnMut(B, T) -> Fut, Fut: Future<Output = Result<Option<(B, U)>, E>>,

Similar to and_then but with a state.
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fn try_stateful_map<B, U, F>( self, init: B, f: F, ) -> TryStatefulMap<S, B, T, U, E, F>
where F: FnMut(B, T) -> Result<Option<(B, U)>, E>,

Similar to map but with a state and is fallible.
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fn catch_error(self) -> (ErrorNotify<E>, CatchError<S>)

Split the stream of Result<T, E> to a stream of T and a future of Result<(), E>. Read more
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impl<S> TryStreamExt for S
where S: TryStream + ?Sized,

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fn err_into<E>(self) -> ErrInto<Self, E>
where Self: Sized, Self::Error: Into<E>,

Wraps the current stream in a new stream which converts the error type into the one provided. Read more
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fn map_ok<T, F>(self, f: F) -> MapOk<Self, F>
where Self: Sized, F: FnMut(Self::Ok) -> T,

Wraps the current stream in a new stream which maps the success value using the provided closure. Read more
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fn map_err<E, F>(self, f: F) -> MapErr<Self, F>
where Self: Sized, F: FnMut(Self::Error) -> E,

Wraps the current stream in a new stream which maps the error value using the provided closure. Read more
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fn and_then<Fut, F>(self, f: F) -> AndThen<Self, Fut, F>
where F: FnMut(Self::Ok) -> Fut, Fut: TryFuture<Error = Self::Error>, Self: Sized,

Chain on a computation for when a value is ready, passing the successful results to the provided closure f. Read more
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fn or_else<Fut, F>(self, f: F) -> OrElse<Self, Fut, F>
where F: FnMut(Self::Error) -> Fut, Fut: TryFuture<Ok = Self::Ok>, Self: Sized,

Chain on a computation for when an error happens, passing the erroneous result to the provided closure f. Read more
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fn inspect_ok<F>(self, f: F) -> InspectOk<Self, F>
where F: FnMut(&Self::Ok), Self: Sized,

Do something with the success value of this stream, afterwards passing it on. Read more
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fn inspect_err<F>(self, f: F) -> InspectErr<Self, F>
where F: FnMut(&Self::Error), Self: Sized,

Do something with the error value of this stream, afterwards passing it on. Read more
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fn into_stream(self) -> IntoStream<Self>
where Self: Sized,

Wraps a TryStream into a type that implements Stream Read more
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fn try_next(&mut self) -> TryNext<'_, Self> ⓘ
where Self: Unpin,

Creates a future that attempts to resolve the next item in the stream. If an error is encountered before the next item, the error is returned instead. Read more
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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>, Self: Sized,

Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
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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>, Self: Sized,

Skip elements on this stream while the provided asynchronous predicate resolves to true. Read more
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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>, Self: Sized,

Take elements on this stream while the provided asynchronous predicate resolves to true. Read more
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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>>, Self: Sized,

Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream concurrently as elements become available, exiting as soon as an error occurs. Read more
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fn try_collect<C>(self) -> TryCollect<Self, C> ⓘ
where C: Default + Extend<Self::Ok>, Self: Sized,

Attempt to transform a stream into a collection, returning a future representing the result of that computation. Read more
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fn try_chunks(self, capacity: usize) -> TryChunks<Self>
where Self: Sized,

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

An adaptor for chunking up successful, ready items of the stream inside a vector. Read more
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fn try_filter<Fut, F>(self, f: F) -> TryFilter<Self, Fut, F>
where Fut: Future<Output = bool>, F: FnMut(&Self::Ok) -> Fut, Self: Sized,

Attempt to filter the values produced by this stream according to the provided asynchronous closure. Read more
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fn try_filter_map<Fut, F, T>(self, f: F) -> TryFilterMap<Self, Fut, F>
where Fut: TryFuture<Ok = Option<T>, Error = Self::Error>, F: FnMut(Self::Ok) -> Fut, Self: Sized,

Attempt to filter 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 try_flatten_unordered( self, limit: impl Into<Option<usize>>, ) -> TryFlattenUnordered<Self>
where Self::Ok: TryStream + Unpin, <Self::Ok as TryStream>::Error: From<Self::Error>, Self: Sized,

Flattens a stream of streams into just one continuous stream. Produced streams will be polled concurrently and any errors will be passed through without looking at them. If the underlying base stream returns an error, it will be immediately propagated. Read more
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fn try_flatten(self) -> TryFlatten<Self>
where Self::Ok: TryStream, <Self::Ok as TryStream>::Error: From<Self::Error>, Self: Sized,

Flattens a stream of streams into just one continuous stream. Read more
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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>, Self: Sized,

Attempt to execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more
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fn try_concat(self) -> TryConcat<Self> ⓘ
where Self: Sized, Self::Ok: Extend<<Self::Ok as IntoIterator>::Item> + IntoIterator + Default,

Attempt to 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 try_buffer_unordered(self, n: usize) -> TryBufferUnordered<Self>
where Self::Ok: TryFuture<Error = Self::Error>, Self: Sized,

Attempt to execute several futures from a stream concurrently (unordered). Read more
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fn try_buffered(self, n: usize) -> TryBuffered<Self>
where Self::Ok: TryFuture<Error = Self::Error>, Self: Sized,

Attempt to execute several futures from a stream concurrently. Read more
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fn try_poll_next_unpin( &mut self, cx: &mut Context<'_>, ) -> Poll<Option<Result<Self::Ok, Self::Error>>>
where Self: Unpin,

A convenience method for calling TryStream::try_poll_next on Unpin stream types.
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fn into_async_read(self) -> IntoAsyncRead<Self>
where Self: Sized + TryStreamExt<Error = Error>, Self::Ok: AsRef<[u8]>,

Adapter that converts this stream into an AsyncBufRead. Read more
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fn try_all<Fut, F>(self, f: F) -> TryAll<Self, Fut, F> ⓘ
where Self: Sized, F: FnMut(Self::Ok) -> Fut, Fut: Future<Output = bool>,

Attempt to execute a predicate over an asynchronous stream and evaluate if all items satisfy the predicate. Exits early if an Err is encountered or if an Ok item is found that does not satisfy the predicate. Read more
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fn try_any<Fut, F>(self, f: F) -> TryAny<Self, Fut, F> ⓘ
where Self: Sized, F: FnMut(Self::Ok) -> Fut, Fut: Future<Output = bool>,

Attempt to execute a predicate over an asynchronous stream and evaluate if any items satisfy the predicate. Exits early if an Err is encountered or if an Ok item is found that satisfies the predicate. Read more