Struct futures::stream::Select [−][src]
#[must_use = "streams do nothing unless polled"]pub struct Select<S1, S2> { /* fields omitted */ }
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. Errors, however, are not merged: you get at most one error at a time.
Trait Implementations
impl<S1: Debug, S2: Debug> Debug for Select<S1, S2>[src]
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impl<S1: Debug, S2: Debug> Debug for Select<S1, S2>fn fmt(&self, f: &mut Formatter) -> Result[src]
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fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl<S1, S2> Stream for Select<S1, S2> where
S1: Stream,
S2: Stream<Item = S1::Item, Error = S1::Error>, [src]
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impl<S1, S2> Stream for Select<S1, S2> where
S1: Stream,
S2: Stream<Item = S1::Item, Error = S1::Error>, type Item = S1::Item
The type of item this stream will yield on success.
type Error = S1::Error
The type of error this stream may generate.
fn poll(&mut self) -> Poll<Option<S1::Item>, S1::Error>[src]
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fn poll(&mut self) -> Poll<Option<S1::Item>, S1::Error>Attempt to pull out the next value of this stream, returning None if the stream is finished. Read more
ⓘImportant traits for Wait<S>fn wait(self) -> Wait<Self> where
Self: Sized, [src]
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fn wait(self) -> Wait<Self> where
Self: Sized, Creates an iterator which blocks the current thread until each item of this stream is resolved. Read more
fn into_future(self) -> StreamFuture<Self> where
Self: Sized, [src]
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fn into_future(self) -> StreamFuture<Self> where
Self: Sized, Converts this stream into a Future. Read more
fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> U,
Self: Sized, [src]
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fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> U,
Self: Sized, Converts a stream of type T to a stream of type U. Read more
fn map_err<U, F>(self, f: F) -> MapErr<Self, F> where
F: FnMut(Self::Error) -> U,
Self: Sized, [src]
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fn map_err<U, F>(self, f: F) -> MapErr<Self, F> where
F: FnMut(Self::Error) -> U,
Self: Sized, Converts a stream of error type T to a stream of error type U. Read more
fn filter<F>(self, f: F) -> Filter<Self, F> where
F: FnMut(&Self::Item) -> bool,
Self: Sized, [src]
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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
fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<B>,
Self: Sized, [src]
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fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<B>,
Self: Sized, Filters the values produced by this stream while simultaneously mapping them to a different type. Read more
fn then<F, U>(self, f: F) -> Then<Self, F, U> where
F: FnMut(Result<Self::Item, Self::Error>) -> U,
U: IntoFuture,
Self: Sized, [src]
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fn then<F, U>(self, f: F) -> Then<Self, F, U> where
F: FnMut(Result<Self::Item, Self::Error>) -> U,
U: IntoFuture,
Self: Sized, Chain on a computation for when a value is ready, passing the resulting item to the provided closure f. Read more
fn and_then<F, U>(self, f: F) -> AndThen<Self, F, U> where
F: FnMut(Self::Item) -> U,
U: IntoFuture<Error = Self::Error>,
Self: Sized, [src]
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fn and_then<F, U>(self, f: F) -> AndThen<Self, F, U> where
F: FnMut(Self::Item) -> U,
U: IntoFuture<Error = Self::Error>,
Self: Sized, Chain on a computation for when a value is ready, passing the successful results to the provided closure f. Read more
fn or_else<F, U>(self, f: F) -> OrElse<Self, F, U> where
F: FnMut(Self::Error) -> U,
U: IntoFuture<Item = Self::Item>,
Self: Sized, [src]
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fn or_else<F, U>(self, f: F) -> OrElse<Self, F, U> where
F: FnMut(Self::Error) -> U,
U: IntoFuture<Item = Self::Item>,
Self: Sized, Chain on a computation for when an error happens, passing the erroneous result to the provided closure f. Read more
fn collect(self) -> Collect<Self> where
Self: Sized, [src]
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fn collect(self) -> Collect<Self> where
Self: Sized, Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more
fn concat2(self) -> Concat2<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default, [src]
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fn concat2(self) -> Concat2<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default, Concatenate all results of a stream into a single extendable destination, returning a future representing the end result. Read more
fn concat(self) -> Concat<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator, [src]
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fn concat(self) -> Concat<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator, : please use Stream::concat2 instead
Concatenate all results of a stream into a single extendable destination, returning a future representing the end result. Read more
fn fold<F, T, Fut>(self, init: T, f: F) -> Fold<Self, F, Fut, T> where
F: FnMut(T, Self::Item) -> Fut,
Fut: IntoFuture<Item = T>,
Self::Error: From<Fut::Error>,
Self: Sized, [src]
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fn fold<F, T, Fut>(self, init: T, f: F) -> Fold<Self, F, Fut, T> where
F: FnMut(T, Self::Item) -> Fut,
Fut: IntoFuture<Item = T>,
Self::Error: From<Fut::Error>,
Self: Sized, Execute an accumulating computation over a stream, collecting all the values into one final result. Read more
fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,
<Self::Item as Stream>::Error: From<Self::Error>,
Self: Sized, [src]
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fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,
<Self::Item as Stream>::Error: From<Self::Error>,
Self: Sized, Flattens a stream of streams into just one continuous stream. Read more
fn skip_while<P, R>(self, pred: P) -> SkipWhile<Self, P, R> where
P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized, [src]
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fn skip_while<P, R>(self, pred: P) -> SkipWhile<Self, P, R> where
P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized, Skip elements on this stream while the predicate provided resolves to true. Read more
fn take_while<P, R>(self, pred: P) -> TakeWhile<Self, P, R> where
P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized, [src]
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fn take_while<P, R>(self, pred: P) -> TakeWhile<Self, P, R> where
P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized, Take elements from this stream while the predicate provided resolves to true. Read more
fn for_each<F, U>(self, f: F) -> ForEach<Self, F, U> where
F: FnMut(Self::Item) -> U,
U: IntoFuture<Item = (), Error = Self::Error>,
Self: Sized, [src]
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fn for_each<F, U>(self, f: F) -> ForEach<Self, F, U> where
F: FnMut(Self::Item) -> U,
U: IntoFuture<Item = (), Error = Self::Error>,
Self: Sized, Runs this stream to completion, executing the provided closure for each element on the stream. Read more
fn from_err<E: From<Self::Error>>(self) -> FromErr<Self, E> where
Self: Sized, [src]
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fn from_err<E: From<Self::Error>>(self) -> FromErr<Self, E> where
Self: Sized, Map this stream's error to any error implementing From for this stream's Error, returning a new stream. Read more
fn take(self, amt: u64) -> Take<Self> where
Self: Sized, [src]
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fn take(self, amt: u64) -> Take<Self> where
Self: Sized, Creates a new stream of at most amt items of the underlying stream. Read more
fn skip(self, amt: u64) -> Skip<Self> where
Self: Sized, [src]
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fn skip(self, amt: u64) -> Skip<Self> where
Self: Sized, Creates a new stream which skips amt items of the underlying stream. Read more
fn fuse(self) -> Fuse<Self> where
Self: Sized, [src]
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fn fuse(self) -> Fuse<Self> where
Self: Sized, Fuse a stream such that poll will never again be called once it has finished. Read more
fn by_ref(&mut self) -> &mut Self where
Self: Sized, [src]
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fn by_ref(&mut self) -> &mut Self where
Self: Sized, Borrows a stream, rather than consuming it. Read more
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: Sized + UnwindSafe, [src]
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fn catch_unwind(self) -> CatchUnwind<Self> where
Self: Sized + UnwindSafe, Catches unwinding panics while polling the stream. Read more
fn buffered(self, amt: usize) -> Buffered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized, [src]
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fn buffered(self, amt: usize) -> Buffered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized, An adaptor for creating a buffered list of pending futures. Read more
fn buffer_unordered(self, amt: usize) -> BufferUnordered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized, [src]
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fn buffer_unordered(self, amt: usize) -> BufferUnordered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized, An adaptor for creating a buffered list of pending futures (unordered). Read more
fn merge<S>(self, other: S) -> Merge<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized, [src]
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fn merge<S>(self, other: S) -> Merge<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized, : functionality provided by select now
An adapter for merging the output of two streams. Read more
fn zip<S>(self, other: S) -> Zip<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized, [src]
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fn zip<S>(self, other: S) -> Zip<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized, An adapter for zipping two streams together. Read more
fn chain<S>(self, other: S) -> Chain<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized, [src]
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fn chain<S>(self, other: S) -> Chain<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized, Adapter for chaining two stream. Read more
fn peekable(self) -> Peekable<Self> where
Self: Sized, [src]
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fn peekable(self) -> Peekable<Self> where
Self: Sized, Creates a new stream which exposes a peek method. Read more
fn chunks(self, capacity: usize) -> Chunks<Self> where
Self: Sized, [src]
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fn chunks(self, capacity: usize) -> Chunks<Self> where
Self: Sized, An adaptor for chunking up items of the stream inside a vector. Read more
fn select<S>(self, other: S) -> Select<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized, [src]
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fn select<S>(self, other: S) -> Select<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized, Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first. Read more
fn forward<S>(self, sink: S) -> Forward<Self, S> where
S: Sink<SinkItem = Self::Item>,
Self::Error: From<S::SinkError>,
Self: Sized, [src]
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fn forward<S>(self, sink: S) -> Forward<Self, S> where
S: Sink<SinkItem = Self::Item>,
Self::Error: From<S::SinkError>,
Self: Sized, A future that completes after the given stream has been fully processed into the sink, including flushing. Read more
fn split(self) -> (SplitSink<Self>, SplitStream<Self>) where
Self: Sink + Sized, [src]
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fn split(self) -> (SplitSink<Self>, SplitStream<Self>) where
Self: Sink + Sized, Splits this Stream + Sink object into separate Stream and Sink objects. Read more
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
Self: Sized, [src]
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fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
Self: Sized, Do something with each item of this stream, afterwards passing it on. Read more
fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnMut(&Self::Error),
Self: Sized, [src]
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fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnMut(&Self::Error),
Self: Sized, Do something with the error of this stream, afterwards passing it on. Read more