Struct sc_network::light_client_requests::sender::LightClientRequestSender[−][src]

pub struct LightClientRequestSender<B: Block> { /* fields omitted */ }

Expand description

State machine helping to send out light client requests.

Implementations

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impl<B> LightClientRequestSender<B> where
    B: Block,

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pub fn new(
    id: &ProtocolId, 
    checker: Arc<dyn FetchChecker<B>>, 
    peerset: PeersetHandle
) -> Self

Construct a new light client handler.

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pub fn update_best_block(&mut self, peer: &PeerId, num: NumberFor)

We rely on external information about peers best blocks as we lack the means to determine it ourselves.

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pub fn request(&mut self, req: Request) -> Result<(), SendRequestError>

Issue a new light client request.

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pub fn inject_connected(&mut self, peer: PeerId)

Signal that the node is connected to the given peer.

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pub fn inject_disconnected(&mut self, peer: PeerId)

Signal that the node disconnected from the given peer.

Trait Implementations

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impl<B: Block> Stream for LightClientRequestSender

type Item = OutEvent

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

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

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

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impl<B: Block> Unpin for LightClientRequestSender

Auto Trait Implementations

impl !RefUnwindSafe for LightClientRequestSender

impl Send for LightClientRequestSender

impl !Sync for LightClientRequestSender

impl !UnwindSafe for LightClientRequestSender

Blanket Implementations

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

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

Mutably borrows from an owned value. Read more

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impl<T> CheckedConversion for T

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fn checked_from<T>(t: T) -> Option<Self> where
    Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

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fn checked_into<T>(self) -> Option<T> where
    Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> Downcast for T where
    T: Any,

pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait. Read more

pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait. Read more

pub fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s. Read more

pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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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> 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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pub fn into(self) -> U

Performs the conversion.

impl<I> IntoStream for I where
    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?

pub fn into_stream(self) -> I

Creates a stream from a value.

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impl<T, Outer> IsWrappedBy<Outer> for T where
    T: From<Outer>,
    Outer: AsRef<T> + AsMut<T> + From<T>,

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pub fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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pub fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> Pointable for T

pub const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

pub unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

pub unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

pub unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

pub unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Same<T> for T

type Output = T

Should always be Self

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impl<T> SaturatedConversion for T

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fn saturated_from<T>(t: T) -> Self where
    Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more

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fn saturated_into<T>(self) -> T where
    Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more

impl<T> StreamExt for T where
    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: 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,

Maps this stream’s items to a different type, returning a new stream of the resulting type. Read more

fn enumerate(self) -> Enumerate<Self>

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>,

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>>,

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,

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>,

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
    Self: Stream<Item = (A, B)>,
    FromA: Default + Extend<A>,
    FromB: Default + Extend<B>,

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

fn concat(self) -> Concat<Self> where
    Self::Item: Extend<<Self::Item as IntoIterator>::Item>,
    Self::Item: IntoIterator,
    Self::Item: Default,

Concatenate all items of a stream into a single extendable destination, returning a future representing the end result. Read more

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

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>,

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>,

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,

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
    F: FnMut(Self::Item) -> U,
    U: Stream,

Maps a stream like [StreamExt::map] but flattens nested Streams. 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<B>>,

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>,

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>,

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,

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 = ()>,

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 = ()>,

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>

Creates a new stream of at most n items of the underlying stream. Read more

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

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

fn fuse(self) -> Fuse<Self>

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: 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: 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: 'a,

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

fn buffered(self, n: usize) -> Buffered<Self> where
    Self::Item: Future,

An adaptor for creating a buffered list of pending futures. Read more

fn buffer_unordered(self, n: usize) -> BufferUnordered<Self> where
    Self::Item: Future,

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,

An adapter for zipping two streams together. Read more

fn chain<St>(self, other: St) -> Chain<Self, St> where
    St: Stream<Item = Self::Item>,

Adapter for chaining two streams. Read more

fn peekable(self) -> Peekable<Self>

Creates a new stream which exposes a peek method. Read more

fn chunks(self, capacity: usize) -> Chunks<Self>

An adaptor for chunking up items of the stream inside a vector. Read more

fn ready_chunks(self, capacity: usize) -> ReadyChunks<Self>

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
    Self: TryStream,
    S: Sink<Self::Ok, Error = Self::Error>,

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>,

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),

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>,

Wrap this stream in an Either stream, making it the left-hand variant of that Either. Read more

fn right_stream<B>(self) -> Either<B, Self> where
    B: Stream<Item = Self::Item>,

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 T where
    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>

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

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

Creates a stream that yields elements based on a predicate. Read more

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

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

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

Creates a stream that yields each stepth element. Read more

fn chain<U>(self, other: U) -> Chain<Self, U> where
    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: Stream<Item = &'a T>,
    T: Clone + 'a,

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

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

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

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

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

fn enumerate(self) -> Enumerate<Self>

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>

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

fn map<B, F>(self, f: F) -> Map<Self, F> where
    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
    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>

Returns the last element of the stream. Read more

fn fuse(self) -> Fuse<Self>

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

fn filter<P>(self, predicate: P) -> Filter<Self, P> where
    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
    F: FnMut(Self::Item) -> U,
    U: IntoStream,

Creates an stream that works like map, but flattens nested structure. Read more

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

Creates an stream that flattens nested structure. Read more

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

Both filters and maps a stream. Read more

fn min_by_key<B, F>(self, key_by: F) -> MinByKeyFuture<Self, Self::Item, F> where
    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
    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
    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::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::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
    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,

Returns the nth element of the stream. Read more

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

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

fn find<P>(&mut self, p: P) -> FindFuture<'_, Self, P> where
    Self: Unpin,
    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,
    F: FnMut(Self::Item) -> Option<B>,

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
    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
    B: Default + Extend<Self::Item>,
    F: FnMut(&Self::Item) -> bool,

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
    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,
    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
    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

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

Combinator that skips elements based on a predicate. Read more

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

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

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

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,
    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,
    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<U>(self, other: U) -> Zip<Self, U> where
    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
    Self: Stream<Item = (A, B)>,
    FromA: Default + Extend<A>,
    FromB: Default + Extend<B>,

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 + Send,
    B: FromStream<Self::Item>,
    Self::Item: Send,

Transforms a stream into a collection. Read more

fn merge<U>(self, other: U) -> Merge<Self, U> where
    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: 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<P>(&mut self, predicate: P) -> PositionFuture<'_, Self, P> where
    Self: Unpin,
    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: 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>

Counts the number of elements in the stream. Read more

fn ne<S>(self, other: S) -> NeFuture<Self, S> where
    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: 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: 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: 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: 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: 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: Stream<Item = S> + 'a,
    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: Stream<Item = P> + 'a,
    P: Product<P>,

Multiplies all elements of the stream. Read more

impl<S> StreamExt for S where
    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>

Counts the number of items in the stream. Read more

fn map<T, F>(self, f: F) -> Map<Self, F> where
    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
    F: FnMut(Self::Item) -> U,
    U: Stream,

Maps items to streams and then concatenates them. Read more

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

Concatenates inner streams. Read more

fn then<F, Fut>(self, f: F) -> Then<Self, F, Fut> where
    F: FnMut(Self::Item) -> Fut,
    Fut: Future,

Maps items of the stream to new values using an async closure. Read more

fn filter<P>(self, predicate: P) -> Filter<Self, P> where
    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
    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>

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

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

Takes items while predicate returns true. Read more

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

Skips the first n items of the stream. Read more

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

Skips items while predicate returns true. Read more

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

Yields every stepth item. Read more

fn chain<U>(self, other: U) -> Chain<Self, U> where
    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>,
    T: Clone + 'a,

Clones all items. Read more

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

Copies all items. Read more

fn collect<C>(self) -> CollectFuture<Self, C> where
    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>>,
    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
    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
    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,
    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
    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 fuse(self) -> Fuse<Self>

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

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

Repeats the stream from beginning to end, forever. Read more

fn enumerate(self) -> Enumerate<Self>

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

fn inspect<F>(self, f: F) -> Inspect<Self, F> where
    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>

Returns the last item in the stream. Read more

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

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

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

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

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

fn for_each<F>(self, f: F) -> ForEachFuture<Self, F> where
    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<U>(self, other: U) -> Zip<Self, U> where
    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
    Self: Stream<Item = (A, B)>,
    FromA: Default + Extend<A>,
    FromB: Default + Extend<B>,

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

fn or<S>(self, other: S) -> Or<Self, S> where
    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
    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: Send + 'a,

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,

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

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impl<St> StreamExt for St where
    St: Stream + ?Sized,

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

Consumes and returns the next value in the stream or None if the stream is finished. Read more

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fn try_next<T, E>(&mut self) -> TryNext<'_, Self> where
    Self: Stream<Item = Result<T, E>> + Unpin,

Consumes and returns 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 map<T, F>(self, f: F) -> Map<Self, F> where
    F: FnMut(Self::Item) -> T,

Maps this stream’s items to a different type, returning a new stream of the resulting type. Read more

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fn merge<U>(self, other: U) -> Merge<Self, U> where
    U: Stream<Item = Self::Item>,

Combine two streams into one by interleaving the output of both as it is produced. Read more

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fn filter<F>(self, f: F) -> Filter<Self, F> where
    F: FnMut(&Self::Item) -> bool,

Filters the values produced by this stream according to the provided predicate. Read more

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

Filters the values produced by this stream while simultaneously mapping them to a different type according to the provided closure. Read more

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fn fuse(self) -> Fuse<Self>

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

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

Creates a new stream of at most n items of the underlying stream. Read more

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fn take_while<F>(self, f: F) -> TakeWhile<Self, F> where
    F: FnMut(&Self::Item) -> bool,

Take elements from this stream while the provided predicate resolves to true. Read more

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

Creates a new stream that will skip the n first items of the underlying stream. Read more

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fn skip_while<F>(self, f: F) -> SkipWhile<Self, F> where
    F: FnMut(&Self::Item) -> bool,

Skip elements from the underlying stream while the provided predicate resolves to true. Read more

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

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

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

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

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fn chain<U>(self, other: U) -> Chain<Self, U> where
    U: Stream<Item = Self::Item>,

Combine two streams into one by first returning all values from the first stream then all values from the second stream. Read more

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fn fold<B, F>(self, init: B, f: F) -> FoldFuture<Self, B, F> where
    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 collect<T>(self) -> Collect<Self, T> where
    T: FromStream<Self::Item>,

Drain stream pushing all emitted values into a collection. Read more

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fn timeout(self, duration: Duration) -> Timeout<Self>

Applies a per-item timeout to the passed stream. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

type Error = >::Error

The type returned in the event of a conversion error.

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

Performs the conversion.

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impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>,

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pub fn unchecked_into(self) -> T

The counterpart to unchecked_from.

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impl<T, S> UniqueSaturatedInto<T> for S where
    T: Bounded,
    S: TryInto<T>,

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pub fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

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

pub 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