AsyncIter in redis - Rust
Description: Represents a redis iterator that can be used with async connections.

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## AsyncIter

# Struct AsyncIter

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    pub struct AsyncIter<'a, T: FromRedisValue + 'a> { /* private fields */ }

Available on crate feature `aio` only.
Expand description

Represents a redis iterator that can be used with async connections.

## Implementations§

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### impl<'a, T: FromRedisValue + 'a + Unpin + Send> AsyncIter<'a, T>

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#### pub async fn next_item(&mut self) -> Option<RedisResult<T>>

    let _: () = con.sadd("my_set", 42i32).await?;
    let _: () = con.sadd("my_set", 43i32).await?;
    let mut iter: redis::AsyncIter<i32> = con.sscan("my_set").await?;
    while let Some(element) = iter.next_item().await {
        let element = element?;
        assert!(element == 42 || element == 43);
    }

## Trait Implementations§

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### impl<'a, T: FromRedisValue + Unpin + Send + 'a> Stream for AsyncIter<'a, T>

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#### type Item = Result<T, RedisError>

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

## Auto Trait Implementations§

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### impl<'a, T> Freeze for AsyncIter<'a, T>

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### impl<'a, T> !RefUnwindSafe for AsyncIter<'a, T>

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### impl<'a, T> Send for AsyncIter<'a, T>
where T: Send,

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### impl<'a, T> !Sync for AsyncIter<'a, T>

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### impl<'a, T> Unpin for AsyncIter<'a, T>
where T: Unpin,

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### impl<'a, T> !UnwindSafe for AsyncIter<'a, T>

## Blanket Implementations§

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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> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T> Instrument for T

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#### fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [`Span`], returning an `Instrumented` wrapper. Read more
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#### fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. 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<T> PolicyExt for T
where T: ?Sized,

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#### fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new `Policy` that returns [`Action::Follow`] only if `self` and `other` return `Action::Follow`. Read more
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#### fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new `Policy` that returns [`Action::Follow`] if either `self` or `other` returns `Action::Follow`. 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 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 `step`th 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 `n`th 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>,

Available on crate features `std` and `race` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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 `Stream`s. 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,

Available on crate feature `alloc` only.
Maps a stream like [`StreamExt::map`] but flattens nested `Stream`s 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,

Available on crate feature `alloc` only.
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,

Available on crate feature `std` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `sink` only.
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>,

Available on crate features `sink` and `alloc` only.
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, 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<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> 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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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,

Available on crate feature `alloc` only.
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]>,

Available on crate features `io` and `std` only.
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
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### impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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### impl<T> WithSubscriber for T

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#### fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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#### fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default `Subscriber` to this type, returning a [`WithDispatch`] wrapper. Read more
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### impl<T> ErasedDestructor for T
where T: 'static,

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### impl<T> MaybeSendSync for T