[][src]Struct futures_util::stream::Empty

#[must_use = "streams do nothing unless polled"]
pub struct Empty<T> { /* fields omitted */ }
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A stream which contains no elements.

This stream can be created with the stream::empty function.

Trait Implementations

impl<T: Debug> Debug for Empty<T>
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Formats the value using the given formatter. Read more

impl<T> Unpin for Empty<T>
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impl<T> Stream for Empty<T>
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Values yielded by the stream.

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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

Auto Trait Implementations

impl<T> Send for Empty<T> where
    T: Send

impl<T> Sync for Empty<T> where
    T: Sync

Blanket Implementations

impl<T> StreamExt for T where
    T: Stream + ?Sized
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Creates a future that resolves to the next item in the stream. Read more

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Converts this stream into a future of (next_item, tail_of_stream). If the stream terminates, then the next item is None. Read more

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

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

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

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Computes from this stream's items new items of a different type using an asynchronous closure. Read more

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Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more

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

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Execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more

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

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Skip elements on this stream while the provided asynchronous predicate resolves to true. Read more

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

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Runs this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more

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Runs this stream to completion, executing the provided asynchronous closure for each element on the stream concurrently as elements become available. Read more

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

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

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Fuse a stream such that poll_next will never again be called once it has finished. Read more

Important traits for &'a mut R
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Borrows a stream, rather than consuming it. Read more

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Catches unwinding panics while polling the stream. Read more

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Wrap the stream in a Box, pinning it.

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

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

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An adapter for zipping two streams together. Read more

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Adapter for chaining two stream. Read more

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

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

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This combinator will attempt to pull items from both streams. Each stream will be polled in a round-robin fashion, and whenever a stream is ready to yield an item that item is yielded. Read more

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A future that completes after the given stream has been fully processed into the sink, including flushing. Read more

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

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Do something with each item of this stream, afterwards passing it on. Read more

Important traits for Either<L, R>
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Wrap this stream in an Either stream, making it the left-hand variant of that Either. Read more

Important traits for Either<L, R>
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Wrap this stream in an Either stream, making it the right-hand variant of that Either. Read more

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A convenience method for calling Stream::poll_next on Unpin stream types. Read more

impl<S> TryStreamExt for S where
    S: TryStream
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Wraps the current stream in a new stream which converts the error type into the one provided. Read more

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Wraps the current stream in a new stream which maps the success value using the provided closure. Read more

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Wraps the current stream in a new stream which maps the error value using the provided closure. Read more

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Wraps a TryStream into a type that implements Stream Read more

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Creates a future that attempts to resolve the next item in the stream. If an error is encountered before the next item, the error is returned instead. Read more

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Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more

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Skip elements on this stream while the provided asynchronous predicate resolves to true. Read more

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Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream concurrently as elements become available, exiting as soon as an error occurs. Read more

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Attempt to Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more

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

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Attempt to execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more

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Attempt to execute several futures from a stream concurrently. Read more

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Wraps a TryStream into a stream compatible with libraries using futures 0.1 Stream. Requires the compat feature to be enabled. ``` #![feature(async_await, await_macro, futures_api)] use futures::future::{FutureExt, TryFutureExt}; use futures::spawn; use futures::compat::TokioDefaultSpawner; # let (tx, rx) = futures::channel::oneshot::channel(); Read more

impl<T> From for T
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Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut R
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Immutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut R
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Mutably borrows from an owned value. Read more

impl<S, T, E> TryStream for S where
    S: Stream<Item = Result<T, E>>, 
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The type of successful values yielded by this future

The type of failures yielded by this future

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Poll this TryStream as if it were a Stream. Read more