Struct futures_util::stream::Select

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#[must_use = "streams do nothing unless polled"]
pub struct Select<St1, St2> { /* fields omitted */ }

[−] Expand description

An adapter for merging the output of two streams.

The merged stream produces items from either of the underlying streams as they become available, and the streams are polled in a round-robin fashion.

Trait Implementations

impl<St1: Debug, St2: Debug> Debug for Select<St1, St2>

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

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Formats the value using the given formatter.

impl<St1: Unpin, St2: Unpin> Unpin for Select<St1, St2>

impl<St1, St2> Stream for Select<St1, St2> where     St1: Stream,     St2: Stream<Item = St1::Item>,

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type Item = St1::Item

Values yielded by the stream.

fn poll_next(self: PinMut<Self>, cx: &mut Context) -> Poll<Option<St1::Item>>

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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.