Struct async_utils::stream::Tagged
source · pub struct Tagged<K, St> { /* private fields */ }
Expand description
A Stream where each yielded item is tagged with a uniform key Items yielded are (K, St::Item)
Tagged streams can be easily created by using the .tagged()
function on the WithTag
trait.
The stream produced by:
stream.tagged(k)
is equivalent to that created by
stream.map(move |v|, (k.clone(), v)
BUT the Tagged type combinator provides a statically nameable type that can easily be expressed
in type signatures such as IndexedStreams
below.
Implementations§
Trait Implementations§
source§impl<K: Clone, St: Stream> Stream for Tagged<K, St>
impl<K: Clone, St: Stream> Stream for Tagged<K, St>
impl<K, St: Unpin> Unpin for Tagged<K, St>
Auto Trait Implementations§
impl<K, St> RefUnwindSafe for Tagged<K, St>where K: RefUnwindSafe, St: RefUnwindSafe,
impl<K, St> Send for Tagged<K, St>where K: Send, St: Send,
impl<K, St> Sync for Tagged<K, St>where K: Sync, St: Sync,
impl<K, St> UnwindSafe for Tagged<K, St>where K: UnwindSafe, St: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
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§impl<T> Encode<Ambiguous1> for T
impl<T> Encode<Ambiguous1> for T
§impl<T> Encode<Ambiguous2> for T
impl<T> Encode<Ambiguous2> for T
§impl<F> FutureExt for Fwhere
F: Future + ?Sized,
impl<F> FutureExt for Fwhere F: Future + ?Sized,
§fn catch_unwind(self) -> CatchUnwind<Self>where
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Catches panics while polling the future. Read more
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§fn map<U, F>(self, f: F) -> Map<Self, F>where
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§fn fuse(self) -> Fuse<Self>where
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Create a cloneable handle to this future where all handles will resolve
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§impl<S> StreamExt for Swhere
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§fn next(&mut self) -> NextFuture<'_, Self>where
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Retrieves the next item in the stream. Read more
§fn try_next<T, E>(&mut self) -> TryNextFuture<'_, Self>where
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§fn map<T, F>(self, f: F) -> Map<Self, F>where
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fn map<T, F>(self, f: F) -> Map<Self, F>where Self: Sized, F: FnMut(Self::Item) -> T,
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§fn flatten(self) -> Flatten<Self>where
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§fn filter<P>(self, predicate: P) -> Filter<Self, P>where
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fn filter<P>(self, predicate: P) -> Filter<Self, P>where Self: Sized, P: FnMut(&Self::Item) -> bool,
§fn filter_map<T, F>(self, f: F) -> FilterMap<Self, F>where
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F: FnMut(Self::Item) -> Option<T>,
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
§fn take(self, n: usize) -> Take<Self>where
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fn take(self, n: usize) -> Take<Self>where Self: Sized,
Takes only the first
n
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fn take_while<P>(self, predicate: P) -> TakeWhile<Self, P>where Self: Sized, P: FnMut(&Self::Item) -> bool,
§fn skip(self, n: usize) -> Skip<Self>where
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§fn chain<U>(self, other: U) -> Chain<Self, U>where
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Appends another stream to the end of this one. Read more
§fn cloned<'a, T>(self) -> Cloned<Self>where
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Clones all items. Read more
§fn copied<'a, T>(self) -> Copied<Self>where
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T: Copy + 'a,
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Copies all items. Read more
§fn collect<C>(self) -> CollectFuture<Self, C>where
Self: Sized,
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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
§fn try_collect<T, E, C>(self) -> TryCollectFuture<Self, C>where
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C: Default + Extend<T>,
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Collects all items in the fallible stream into a collection. Read more
§fn partition<B, P>(self, predicate: P) -> PartitionFuture<Self, P, B>where
Self: Sized,
B: Default + Extend<Self::Item>,
P: FnMut(&Self::Item) -> bool,
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§fn fold<T, F>(self, init: T, f: F) -> FoldFuture<Self, F, T>where
Self: Sized,
F: FnMut(T, Self::Item) -> T,
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
§fn try_fold<T, E, F, B>(
&mut self,
init: B,
f: F
) -> TryFoldFuture<'_, Self, F, B>where
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F: FnMut(B, T) -> Result<B, E>,
fn try_fold<T, E, F, B>( &mut self, init: B, f: F ) -> TryFoldFuture<'_, Self, F, B>where Self: Stream<Item = Result<T, E>> + Unpin + Sized, F: FnMut(B, T) -> Result<B, E>,
Accumulates a fallible computation over the stream. Read more
§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>,
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
§fn cycle(self) -> Cycle<Self>where
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fn cycle(self) -> Cycle<Self>where Self: Clone + Sized,
Repeats the stream from beginning to end, forever. Read more
§fn enumerate(self) -> Enumerate<Self>where
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fn enumerate(self) -> Enumerate<Self>where Self: Sized,
Enumerates items, mapping them to
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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
§fn nth(&mut self, n: usize) -> NthFuture<'_, Self>where
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Gets the
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§fn for_each<F>(self, f: F) -> ForEachFuture<Self, F>where
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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
§fn try_for_each<F, E>(&mut self, f: F) -> TryForEachFuture<'_, Self, F>where
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F: FnMut(Self::Item) -> Result<(), E>,
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Calls a fallible closure on each item of the stream, stopping on first error. Read more
§fn zip<U>(self, other: U) -> Zip<Self, U>where
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Zips up two streams into a single stream of pairs. Read more
§fn unzip<A, B, FromA, FromB>(self) -> UnzipFuture<Self, FromA, FromB>where
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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: Stream<Item = (A, B)> + Sized,
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§fn race<S>(self, other: S) -> Race<Self, S>where
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Merges with
other
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impl<T> StreamExt for Twhere T: Stream + ?Sized,
§fn next(&mut self) -> Next<'_, Self>where
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Creates a future that resolves to the next item in the stream. 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
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§fn enumerate(self) -> Enumerate<Self>where
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Creates a stream which gives the current iteration count as well as
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§fn filter<Fut, F>(self, f: F) -> Filter<Self, Fut, F>where
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Fut: Future<Output = bool>,
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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
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§fn filter_map<Fut, T, F>(self, f: F) -> FilterMap<Self, Fut, F>where
F: FnMut(Self::Item) -> Fut,
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Self: Sized,
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
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§fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F>where
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Fut: Future,
Self: Sized,
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
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§fn collect<C>(self) -> Collect<Self, C>where
C: Default + Extend<Self::Item>,
Self: Sized,
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
§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)>,
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
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§fn concat(self) -> Concat<Self>where
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Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default,
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
§fn count(self) -> Count<Self>where
Self: Sized,
fn count(self) -> Count<Self>where Self: Sized,
Drives the stream to completion, counting the number of items. Read more
§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,
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
§fn any<Fut, F>(self, f: F) -> Any<Self, Fut, F>where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = bool>,
Self: Sized,
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
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F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = bool>,
Self: Sized,
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§fn flatten(self) -> Flatten<Self>where
Self::Item: Stream,
Self: Sized,
fn flatten(self) -> Flatten<Self>where Self::Item: Stream, Self: Sized,
Flattens a stream of streams into just one continuous stream. Read more
§fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>where
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U: Stream,
Self: Sized,
fn flat_map<U, F>(self, f: F) -> FlatMap<Self, U, F>where F: FnMut(Self::Item) -> U, U: Stream, Self: Sized,
§fn scan<S, B, Fut, F>(self, initial_state: S, f: F) -> Scan<Self, S, Fut, F>where
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Fut: Future<Output = Option<B>>,
Self: Sized,
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§fn skip_while<Fut, F>(self, f: F) -> SkipWhile<Self, Fut, F>where
F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
Self: Sized,
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§fn take_while<Fut, F>(self, f: F) -> TakeWhile<Self, Fut, F>where
F: FnMut(&Self::Item) -> Fut,
Fut: Future<Output = bool>,
Self: Sized,
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§fn take_until<Fut>(self, fut: Fut) -> TakeUntil<Self, Fut>where
Fut: Future,
Self: Sized,
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
§fn for_each<Fut, F>(self, f: F) -> ForEach<Self, Fut, F>where
F: FnMut(Self::Item) -> Fut,
Fut: Future<Output = ()>,
Self: Sized,
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
§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,
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
§fn take(self, n: usize) -> Take<Self>where
Self: Sized,
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§fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
fn skip(self, n: usize) -> Skip<Self>where Self: Sized,
Creates a new stream which skips
n
items of the underlying stream. Read more§fn catch_unwind(self) -> CatchUnwind<Self>where
Self: Sized + UnwindSafe,
fn catch_unwind(self) -> CatchUnwind<Self>where Self: Sized + UnwindSafe,
Catches unwinding panics while polling the stream. Read more
§fn boxed<'a>(
self
) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>where
Self: Sized + Send + 'a,
fn boxed<'a>( self ) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>where Self: Sized + Send + 'a,
Wrap the stream in a Box, pinning it. Read more
§fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>where
Self: Sized + 'a,
fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>where Self: Sized + 'a,
Wrap the stream in a Box, pinning it. Read more
§fn buffered(self, n: usize) -> Buffered<Self>where
Self::Item: Future,
Self: Sized,
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
§fn buffer_unordered(self, n: usize) -> BufferUnordered<Self>where
Self::Item: Future,
Self: Sized,
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
§fn zip<St>(self, other: St) -> Zip<Self, St>where
St: Stream,
Self: Sized,
fn zip<St>(self, other: St) -> Zip<Self, St>where St: Stream, Self: Sized,
An adapter for zipping two streams together. Read more
§fn chain<St>(self, other: St) -> Chain<Self, St>where
St: Stream<Item = Self::Item>,
Self: Sized,
fn chain<St>(self, other: St) -> Chain<Self, St>where St: Stream<Item = Self::Item>, Self: Sized,
Adapter for chaining two streams. Read more
§fn peekable(self) -> Peekable<Self>where
Self: Sized,
fn peekable(self) -> Peekable<Self>where Self: Sized,
Creates a new stream which exposes a
peek
method. Read more§fn chunks(self, capacity: usize) -> Chunks<Self>where
Self: Sized,
fn chunks(self, capacity: usize) -> Chunks<Self>where Self: Sized,
An adaptor for chunking up items of the stream inside a vector. Read more
§fn ready_chunks(self, capacity: usize) -> ReadyChunks<Self>where
Self: Sized,
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
§fn forward<S>(self, sink: S) -> Forward<Self, S>where
S: Sink<Self::Ok, Error = Self::Error>,
Self: TryStream + Sized,
fn forward<S>(self, sink: S) -> Forward<Self, S>where S: Sink<Self::Ok, Error = Self::Error>, Self: TryStream + Sized,
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
§fn inspect<F>(self, f: F) -> Inspect<Self, F>where
F: FnMut(&Self::Item),
Self: Sized,
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
§fn left_stream<B>(self) -> Either<Self, B>where
B: Stream<Item = Self::Item>,
Self: Sized,
fn left_stream<B>(self) -> Either<Self, B>where B: Stream<Item = Self::Item>, Self: Sized,
§fn right_stream<B>(self) -> Either<B, Self>where
B: Stream<Item = Self::Item>,
Self: Sized,
fn right_stream<B>(self) -> Either<B, Self>where B: Stream<Item = Self::Item>, Self: Sized,
§fn poll_next_unpin(&mut self, cx: &mut Context<'_>) -> Poll<Option<Self::Item>>where
Self: Unpin,
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.§fn select_next_some(&mut self) -> SelectNextSome<'_, Self>where
Self: Unpin + FusedStream,
fn select_next_some(&mut self) -> SelectNextSome<'_, Self>where Self: Unpin + FusedStream,
§impl<F> TimeoutExt for Fwhere
F: Future,
impl<F> TimeoutExt for Fwhere F: Future,
§fn on_timeout<WT, OT>(self, time: WT, on_timeout: OT) -> OnTimeout<Self, OT>where
WT: WakeupTime,
OT: FnOnce() -> Self::Output,
fn on_timeout<WT, OT>(self, time: WT, on_timeout: OT) -> OnTimeout<Self, OT>where WT: WakeupTime, OT: FnOnce() -> Self::Output,
Wraps the future in a timeout, calling
on_timeout
to produce a result
when the timeout occurs.§fn on_stalled<OS>(
self,
timeout: Duration,
on_stalled: OS
) -> OnStalled<Self, OS>where
OS: FnOnce() -> Self::Output,
fn on_stalled<OS>( self, timeout: Duration, on_stalled: OS ) -> OnStalled<Self, OS>where OS: FnOnce() -> Self::Output,
Wraps the future in a stall-guard, calling
on_stalled
to produce a result
when the future hasn’t been otherwise polled within the timeout
.
This is a heuristic - spurious wakeups will keep the detection from triggering,
and moving all work to external tasks or threads with force the triggering early.source§impl<T> WithEpitaph for Twhere
T: Stream,
impl<T> WithEpitaph for Twhere T: Stream,
source§fn with_epitaph<E>(self, epitaph: E) -> StreamWithEpitaph<T, E>
fn with_epitaph<E>(self, epitaph: E) -> StreamWithEpitaph<T, E>
Map this stream to one producing a
StreamItem::Item
value for each item of the stream
followed by a single StreamItem::Epitaph
value with the provided epitaph
.