Struct sc_peerset::Peerset

impl Peerset

pub fn from_config(config: PeersetConfig) -> (Self, PeersetHandle)

Builds a new peerset from the given configuration.

pub fn reserved_peers(&self, set_id: SetId) -> impl Iterator<Item = &PeerId>

Returns the list of reserved peers.

pub fn add_to_peers_set(&mut self, set_id: SetId, peer_id: PeerId)

Adds a node to the given set. The peerset will, if possible and not already the case, try to connect to it.

Note: This has the same effect as PeersetHandle::add_to_peers_set.

pub fn incoming(&mut self, set_id: SetId, peer_id: PeerId, index: IncomingIndex)

Indicate that we received an incoming connection. Must be answered either with a corresponding Accept or Reject, except if we were already connected to this peer.

Note that this mechanism is orthogonal to Connect/Drop. Accepting an incoming connection implicitly means Connect, but incoming connections aren’t cancelled by dropped.

pub fn dropped(&mut self, set_id: SetId, peer_id: PeerId, reason: DropReason)

Indicate that we dropped an active connection with a peer, or that we failed to connect.

Must only be called after the PSM has either generated a Connect message with this PeerId, or accepted an incoming connection with this PeerId.

pub fn report_peer(&mut self, peer_id: PeerId, score_diff: ReputationChange)

Reports an adjustment to the reputation of the given peer.

pub fn debug_info(&mut self) -> Value

Produces a JSON object containing the state of the peerset manager, for debugging purposes.

pub fn num_discovered_peers(&self) -> usize

Returns the number of peers that we have discovered.

Trait Implementations§

impl Debug for Peerset

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

Formats the value using the given formatter. Read more

impl Stream for Peerset

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

fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more

Auto Trait Implementations§

impl !RefUnwindSafe for Peerset

Blanket Implementations§

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl IntoStream for Iwhere
I: Stream,

type Item = ::Item

The type of the elements being iterated over.

type IntoStream = I

Which kind of stream are we turning this into?

fn into_stream(self) -> I

Creates a stream from a value.

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> StreamExt for Twhere
T: Stream + ?Sized,

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

Creates a future that resolves to the next item in the stream. Read more

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

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

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

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

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

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

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,
 Self: Sized + Stream<Item = (A, B)>,

Converts a stream of pairs into a future, which resolves to pair of containers. Read more

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,

Drives the stream to completion, counting the number of items. Read more

fn cycle(self) -> Cycle<Self>where
Self: Sized + Clone,

Repeats a stream endlessly. 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,

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,

Execute predicate over asynchronous stream, and return true if any element in stream satisfied a predicate. Read more

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,

Flattens a stream of streams into just one continuous stream. Read more

fn flatten_unordered(
 self,
 limit: impl Into<Option<usize>>
) -> FlattenUnordered<Self>where
 Self::Item: Stream + Unpin,
 Self: Sized,

Flattens a stream of streams into just one continuous stream. Polls inner streams concurrently. Read more

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

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

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>,
 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,

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,

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,

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,

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,

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,

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,

Creates a new stream which skips n items of the underlying stream. Read more

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

fn by_ref(&mut self) -> &mut Self

Borrows a stream, rather than consuming it. Read more

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: 'a + Sized + Send,

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: 'a + Sized,

Wrap the stream in a Box, pinning it. Read more

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,

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,

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,

Adapter for chaining two streams. Read more

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,

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,

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,

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 split<Item>(self) -> (SplitSink<Self, Item>, SplitStream<Self>)where
Self: Sink<Item> + Sized,

Splits this Stream + Sink object into separate Sink and Stream objects. Read more

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(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

fn right_stream(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

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. Read more

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

impl<T> StreamExt for Twhere
T: Stream + ?Sized,

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

Advances the stream and returns the next value. Read more

fn take(self, n: usize) -> Take<Self>where
Self: Sized,

Creates a stream that yields its first n elements. Read more

fn take_while(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

fn throttle(self, d: Duration) -> Throttle<Self>where
Self: Sized,

Limit the amount of items yielded per timeslice in a stream. Read more

fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,

Creates a stream that yields each stepth element. Read more

fn chain(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

fn cloned<'a, T>(self) -> Cloned<Self>where
Self: Sized + Stream<Item = &'a T>,
T: 'a + Clone,

Creates an stream which copies all of its elements. Read more

fn copied<'a, T>(self) -> Copied<Self>where
Self: Sized + Stream<Item = &'a T>,
T: 'a + Copy,

Creates an stream which copies all of its elements. Read more

fn cycle(self) -> Cycle<Self>where
Self: Clone + Sized,

Creates a stream that yields the provided values infinitely and in order. Read more

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

fn delay(self, dur: Duration) -> Delay<Self>where
Self: Sized,

Creates a stream that is delayed before it starts yielding items. Read more

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

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

fn last(self) -> LastFuture<Self, Self::Item>where
Self: Sized,

Returns the last element of the stream. Read more

fn fuse(self) -> Fuse<Self>where
Self: Sized,

Creates a stream which ends after the first None. Read more

fn filter(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

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

fn flatten(self) -> Flatten<Self>where
Self: Sized,
Self::Item: IntoStream,

Creates an stream that flattens nested structure. Read more

fn filter_map<B, F>(self, f: F) -> FilterMap<Self, F>where
Self: Sized,
F: FnMut(Self::Item) -> Option,

Both filters and maps a stream. Read more

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

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

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

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

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

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

fn nth(&mut self, n: usize) -> NthFuture<'_, Self>where
Self: Unpin + Sized,

Returns the nth element of the stream. Read more

fn all<F>(&mut self, f: F) -> AllFuture<'_, Self, F, Self::Item>where
Self: Unpin + Sized,
F: FnMut(Self::Item) -> bool,

Tests if every element of the stream matches a predicate. Read more

fn find(&mut self, p: P) -> FindFuture<'_, Self, P>where
Self: Unpin + Sized,
P: FnMut(&Self::Item) -> bool,

Searches for an element in a stream that satisfies a predicate. Read more

fn find_map<F, B>(&mut self, f: F) -> FindMapFuture<'_, Self, F>where
Self: Unpin + Sized,
F: FnMut(Self::Item) -> Option,

Applies function to the elements of stream and returns the first non-none result. Read more

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

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

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

fn any<F>(&mut self, f: F) -> AnyFuture<'_, Self, F, Self::Item>where
Self: Unpin + Sized,
F: FnMut(Self::Item) -> bool,

Tests if any element of the stream matches a predicate. Read more

fn by_ref(&mut self) -> &mut Self

Borrows an stream, rather than consuming it. 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,

A stream adaptor similar to fold that holds internal state and produces a new stream. Read more

fn skip_while(self, predicate: P) -> SkipWhile<Self, P>where
Self: Sized,
P: FnMut(&Self::Item) -> bool,

Combinator that skips elements based on a predicate. Read more

fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,

Creates a combinator that skips the first n elements. Read more

fn timeout(self, dur: Duration) -> Timeout<Self>where
Self: Stream + Sized,

Await a stream or times out after a duration of time. Read more

fn try_fold<B, F, T, E>(&mut self, init: T, f: F) -> TryFoldFuture<'_, Self, F, T>where
Self: Unpin + Sized,
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

fn try_for_each<F, E>(&mut self, f: F) -> TryForEachFuture<'_, Self, F>where
Self: Unpin + Sized,
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

fn zip(self, other: U) -> Zip<Self, U>where
Self: Sized,
U: Stream,

‘Zips up’ two streams into a single stream of pairs. Read more

fn unzip<A, B, FromA, FromB>(self) -> UnzipFuture<Self, FromA, FromB>where
 FromA: Default + Extend<A>,
 FromB: Default + Extend,
 Self: Stream<Item = (A, B)> + Sized,

Converts an stream of pairs into a pair of containers. Read more

fn collect<'a, B>(self) -> Pin<Box<dyn Future<Output = B> + Send + 'a, Global>>where
 Self: 'a + Sized + Send,
 B: FromStream<Self::Item>,
 Self::Item: Send,

Transforms a stream into a collection. Read more

fn merge(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

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

fn position(&mut self, predicate: P) -> PositionFuture<'_, Self, P>where
Self: Unpin + Sized,
P: FnMut(Self::Item) -> bool,

Searches for an element in a Stream that satisfies a predicate, returning its index. Read more

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

fn count(self) -> CountFuture<Self>where
Self: Sized,

Counts the number of elements in the stream. Read more

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

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

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

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

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

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

fn sum<'a, S>(self) -> Pin<Box<dyn Future<Output = S> + 'a, Global>>where
Self: 'a + Sized + Stream<Item = S>,
S: Sum<Self::Item>,

Sums the elements of a stream. Read more

fn product<'a, P>(self) -> Pin<Box<dyn Future<Output = P> + 'a, Global>>where
Self: 'a + Sized + Stream<Item = P>,
P: Product,

Multiplies all elements of the stream. Read more

impl<S> StreamExt for Swhere
S: Stream + ?Sized,

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.

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

Retrieves the next item in the stream. Read more

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

fn count(self) -> CountFuture<Self>where
Self: Sized,

Counts the number of items in the stream. Read more

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

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

fn flatten(self) -> Flatten<Self>where
Self: Sized,
Self::Item: Stream,

Concatenates inner streams. Read more

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

fn filter(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

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
Self: Sized,

Takes only the first n items of the stream. Read more

fn take_while(self, predicate: P) -> TakeWhile<Self, P>where
Self: Sized,
P: FnMut(&Self::Item) -> bool,

Takes items while predicate returns true. Read more

fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,

Skips the first n items of the stream. Read more

fn skip_while(self, predicate: P) -> SkipWhile<Self, P>where
Self: Sized,
P: FnMut(&Self::Item) -> bool,

Skips items while predicate returns true. Read more

fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,

Yields every stepth item. Read more

fn chain(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

fn cloned<'a, T>(self) -> Cloned<Self>where
Self: Stream<Item = &'a T> + Sized,
T: 'a + Clone,

Clones all items. Read more

fn copied<'a, T>(self) -> Copied<Self>where
Self: Stream<Item = &'a T> + Sized,
T: 'a + Copy,

Copies all items. Read more

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
Self: Stream<Item = Result<T, E>> + Sized,
C: Default + Extend<T>,

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,

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,

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
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,

Maps items of the stream to new values using a state value and a closure. Read more

fn fuse(self) -> Fuse<Self>where
Self: Sized,

Fuses the stream so that it stops yielding items after the first None. Read more

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
Self: Sized,

Enumerates items, mapping them to (index, item). Read more

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
Self: Unpin,

Gets the nth item of the stream. Read more

fn last(self) -> LastFuture<Self>where
Self: Sized,

Returns the last item in the stream. Read more

fn find(&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

fn find_map<F, B>(&mut self, f: F) -> FindMapFuture<'_, Self, F>where
Self: Unpin,
F: FnMut(Self::Item) -> Option,

Applies a closure to items in the stream and returns the first Some result. Read more

fn position(&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

fn all(&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

fn any(&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

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
Self: Unpin,
F: FnMut(Self::Item) -> Result<(), E>,

Calls a fallible closure on each item of the stream, stopping on first error. Read more

fn zip(self, other: U) -> Zip<Self, U>where
Self: Sized,
U: Stream,

Zips up two streams into a single stream of pairs. Read more

fn unzip<A, B, FromA, FromB>(self) -> UnzipFuture<Self, FromA, FromB>where
 FromA: Default + Extend<A>,
 FromB: Default + Extend,
 Self: Stream<Item = (A, B)> + Sized,

Collects a stream of pairs into a pair of collections. Read more

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

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

fn boxed<'a>(
self
) -> Pin<Box<dyn Stream<Item = Self::Item> + Send + 'a, Global>>where
Self: 'a + Send + Sized,

Boxes the stream and changes its type to dyn Stream + Send + 'a. Read more

fn boxed_local<'a>(self) -> Pin<Box<dyn Stream<Item = Self::Item> + 'a, Global>>where
Self: 'a + Sized,

Boxes the stream and changes its type to dyn Stream + 'a. Read more

impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source§

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

impl<V, T> VZip<V> for Twhere
V: MultiLane<T>,

fn vzip(self) -> V