[−][src]Struct futures::stream::Select
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, S2> Stream for Select<S1, S2> where
S1: Stream,
S2: Stream<Item = S1::Item, Error = S1::Error>,
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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>
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ⓘImportant traits for Wait<S>fn wait(self) -> Wait<Self> where
Self: Sized,
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ⓘImportant traits for Wait<S>
Self: Sized,
fn into_future(self) -> StreamFuture<Self> where
Self: Sized,
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Self: Sized,
fn map<U, F>(self, f: F) -> Map<Self, F> where
F: FnMut(Self::Item) -> U,
Self: Sized,
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F: FnMut(Self::Item) -> U,
Self: Sized,
fn map_err<U, F>(self, f: F) -> MapErr<Self, F> where
F: FnMut(Self::Error) -> U,
Self: Sized,
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F: FnMut(Self::Error) -> U,
Self: Sized,
fn filter<F>(self, f: F) -> Filter<Self, F> where
F: FnMut(&Self::Item) -> bool,
Self: Sized,
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F: FnMut(&Self::Item) -> bool,
Self: Sized,
fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where
F: FnMut(Self::Item) -> Option<B>,
Self: Sized,
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F: FnMut(Self::Item) -> Option<B>,
Self: Sized,
fn then<F, U>(self, f: F) -> Then<Self, F, U> where
F: FnMut(Result<Self::Item, Self::Error>) -> U,
U: IntoFuture,
Self: Sized,
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F: FnMut(Result<Self::Item, Self::Error>) -> U,
U: IntoFuture,
Self: Sized,
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,
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F: FnMut(Self::Item) -> U,
U: IntoFuture<Error = Self::Error>,
Self: Sized,
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,
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F: FnMut(Self::Error) -> U,
U: IntoFuture<Item = Self::Item>,
Self: Sized,
fn collect(self) -> Collect<Self> where
Self: Sized,
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Self: Sized,
fn concat2(self) -> Concat2<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default,
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Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator + Default,
fn concat(self) -> Concat<Self> where
Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator,
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Self: Sized,
Self::Item: Extend<<Self::Item as IntoIterator>::Item> + IntoIterator,
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,
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F: FnMut(T, Self::Item) -> Fut,
Fut: IntoFuture<Item = T>,
Self::Error: From<Fut::Error>,
Self: Sized,
fn flatten(self) -> Flatten<Self> where
Self::Item: Stream,
<Self::Item as Stream>::Error: From<Self::Error>,
Self: Sized,
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Self::Item: Stream,
<Self::Item as Stream>::Error: From<Self::Error>,
Self: Sized,
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,
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P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized,
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,
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P: FnMut(&Self::Item) -> R,
R: IntoFuture<Item = bool, Error = Self::Error>,
Self: Sized,
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,
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F: FnMut(Self::Item) -> U,
U: IntoFuture<Item = (), Error = Self::Error>,
Self: Sized,
fn from_err<E: From<Self::Error>>(self) -> FromErr<Self, E> where
Self: Sized,
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Self: Sized,
fn take(self, amt: u64) -> Take<Self> where
Self: Sized,
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Self: Sized,
fn skip(self, amt: u64) -> Skip<Self> where
Self: Sized,
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Self: Sized,
fn fuse(self) -> Fuse<Self> where
Self: Sized,
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Self: Sized,
fn by_ref(&mut self) -> &mut Self where
Self: Sized,
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Self: Sized,
fn catch_unwind(self) -> CatchUnwind<Self> where
Self: Sized + UnwindSafe,
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Self: Sized + UnwindSafe,
fn buffered(self, amt: usize) -> Buffered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized,
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Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized,
fn buffer_unordered(self, amt: usize) -> BufferUnordered<Self> where
Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized,
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Self::Item: IntoFuture<Error = Self::Error>,
Self: Sized,
fn merge<S>(self, other: S) -> Merge<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized,
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S: Stream<Error = Self::Error>,
Self: Sized,
fn zip<S>(self, other: S) -> Zip<Self, S> where
S: Stream<Error = Self::Error>,
Self: Sized,
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S: Stream<Error = Self::Error>,
Self: Sized,
fn chain<S>(self, other: S) -> Chain<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized,
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S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized,
fn peekable(self) -> Peekable<Self> where
Self: Sized,
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Self: Sized,
fn chunks(self, capacity: usize) -> Chunks<Self> where
Self: Sized,
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Self: Sized,
fn select<S>(self, other: S) -> Select<Self, S> where
S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized,
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S: Stream<Item = Self::Item, Error = Self::Error>,
Self: Sized,
fn forward<S>(self, sink: S) -> Forward<Self, S> where
S: Sink<SinkItem = Self::Item>,
Self::Error: From<S::SinkError>,
Self: Sized,
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S: Sink<SinkItem = Self::Item>,
Self::Error: From<S::SinkError>,
Self: Sized,
fn split(self) -> (SplitSink<Self>, SplitStream<Self>) where
Self: Sink + Sized,
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Self: Sink + Sized,
fn inspect<F>(self, f: F) -> Inspect<Self, F> where
F: FnMut(&Self::Item),
Self: Sized,
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F: FnMut(&Self::Item),
Self: Sized,
fn inspect_err<F>(self, f: F) -> InspectErr<Self, F> where
F: FnMut(&Self::Error),
Self: Sized,
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F: FnMut(&Self::Error),
Self: Sized,
impl<S1: Debug, S2: Debug> Debug for Select<S1, S2>
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Auto Trait Implementations
impl<S1, S2> Unpin for Select<S1, S2> where
S1: Unpin,
S2: Unpin,
S1: Unpin,
S2: Unpin,
impl<S1, S2> Send for Select<S1, S2> where
S1: Send,
S2: Send,
S1: Send,
S2: Send,
impl<S1, S2> Sync for Select<S1, S2> where
S1: Sync,
S2: Sync,
S1: Sync,
S2: Sync,
impl<S1, S2> UnwindSafe for Select<S1, S2> where
S1: UnwindSafe,
S2: UnwindSafe,
S1: UnwindSafe,
S2: UnwindSafe,
impl<S1, S2> RefUnwindSafe for Select<S1, S2> where
S1: RefUnwindSafe,
S2: RefUnwindSafe,
S1: RefUnwindSafe,
S2: RefUnwindSafe,
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,