Struct futures::stream::Peekable [] [src]

pub struct Peekable<S: Stream> { /* fields omitted */ }
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A Stream that implements a peek method.

The peek method can be used to retrieve a reference to the next Stream::Item if available. A subsequent call to poll will return the owned item.

Methods

impl<S: Stream> Peekable<S>
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Peek retrieves a reference to the next item in the stream.

This method polls the underlying stream and return either a reference to the next item if the stream is ready or passes through any errors.

Trait Implementations

impl<S> Sink for Peekable<S> where S: Sink + Stream
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The type of value that the sink accepts.

The type of value produced by the sink when an error occurs.

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Begin the process of sending a value to the sink. Read more

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Make progress on all pending requests, and determine whether they have completed. Read more

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Composes a function in front of the sink. Read more

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Adds a fixed-size buffer to the current sink. Read more

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A future that completes when the sink has finished processing all pending requests. Read more

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

impl<S: Stream> Stream for Peekable<S>
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The type of item this stream will yield on success.

The type of error this stream may generate.

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Attempt to pull out the next value of this stream, returning None if the stream is finished. Read more

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Creates an iterator which blocks the current thread until each item of this stream is resolved. Read more

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Convenience function for turning this stream into a trait object. Read more

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Converts this stream into a Future. Read more

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Converts a stream of type T to a stream of type U. Read more

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Converts a stream of error type T to a stream of error type U. Read more

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

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

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Chain on a computation for when a value is ready, passing the resulting item to the provided closure f. Read more

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Chain on a computation for when a value is ready, passing the successful results to the provided closure f. Read more

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Chain on a computation for when an error happens, passing the erroneous result to the provided closure f. 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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Execute an accumulating 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 predicate provided resolves to true. Read more

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

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

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

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

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

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Catches unwinding panics while polling the stream. Read more

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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 merging the output of two streams. 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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Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first. 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