Struct tokio_stream::Empty

source · 
pub struct Empty<T>(/* private fields */);
Expand description

Stream for the empty function.

Trait Implementations§

source§

impl<T: Debug> Debug for Empty<T>

source§

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

Formats the value using the given formatter. Read more
source§

impl<T> Stream for Empty<T>

§

type Item = T

Values yielded by the stream.
source§

fn poll_next(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Option<T>>

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
source§

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

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

impl<T> Send for Empty<T>

source§

impl<T> Sync for Empty<T>

source§

impl<T> Unpin for Empty<T>

Auto Trait Implementations§

§

impl<T> RefUnwindSafe for Empty<T>where T: RefUnwindSafe,

§

impl<T> UnwindSafe for Empty<T>where T: UnwindSafe,

Blanket Implementations§

source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

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

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.

source§

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

source§

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
source§

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
source§

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
source§

fn map_while<T, F>(self, f: F) -> MapWhile<Self, F>where F: FnMut(Self::Item) -> Option<T>, Self: Sized,

Map this stream’s items to a different type for as long as determined by the provided closure. A stream of the target type will be returned, which will yield elements until the closure returns None. Read more
source§

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

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

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

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

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

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

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

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

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

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

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
source§

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

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

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

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

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

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

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
source§

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
source§

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

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

fn fold<B, F>(self, init: B, f: F) -> FoldFuture<Self, B, F>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
source§

fn collect<T>(self) -> Collect<Self, T>where T: FromStream<Self::Item>, Self: Sized,

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

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

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

fn timeout_repeating(self, interval: Interval) -> TimeoutRepeating<Self>where Self: Sized,

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

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

Slows down a stream by enforcing a delay between items. Read more
source§

fn chunks_timeout( self, max_size: usize, duration: Duration ) -> ChunksTimeout<Self>where Self: Sized,

Batches the items in the given stream using a maximum duration and size for each batch. Read more
source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

impl<S, T, E> TryStream for Swhere S: Stream<Item = Result<T, E>> + ?Sized,

§

type Ok = T

The type of successful values yielded by this future
§

type Error = E

The type of failures yielded by this future
source§

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