[−][src]Struct futures_util::stream::Then
A stream combinator which chains a computation onto each item produced by a stream.
This structure is produced by the Stream::then
method.
Trait Implementations
impl<St: Debug, Fut: Debug, F: Debug> Debug for Then<St, Fut, F>
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impl<St: Debug, Fut: Debug, F: Debug> Debug for Then<St, Fut, F>
impl<St: Unpin, Fut: Unpin, F> Unpin for Then<St, Fut, F>
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impl<St: Unpin, Fut: Unpin, F> Unpin for Then<St, Fut, F>
impl<St, Fut, F> Stream for Then<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future,
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impl<St, Fut, F> Stream for Then<St, Fut, F> where
St: Stream,
F: FnMut(St::Item) -> Fut,
Fut: Future,
type Item = Fut::Output
Values yielded by the stream.
fn poll_next(self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<Option<Fut::Output>> | [src] |
impl<St: FusedStream, Fut, F> FusedStream for Then<St, Fut, F>
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impl<St: FusedStream, Fut, F> FusedStream for Then<St, Fut, F>
fn is_terminated(&self) -> bool | [src] |
Auto Trait Implementations
impl<St, Fut, F> Send for Then<St, Fut, F> where
F: Send,
Fut: Send,
St: Send,
impl<St, Fut, F> Send for Then<St, Fut, F> where
F: Send,
Fut: Send,
St: Send,
impl<St, Fut, F> Sync for Then<St, Fut, F> where
F: Sync,
Fut: Sync,
St: Sync,
impl<St, Fut, F> Sync for Then<St, Fut, F> where
F: Sync,
Fut: Sync,
St: Sync,
Blanket Implementations
impl<T> StreamExt for T where
T: Stream + ?Sized,
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impl<T> StreamExt for T where
T: Stream + ?Sized,
fn next(&mut self) -> Next<Self> where | [src] |
Creates a future that resolves to the next item in the stream. Read more
fn into_future(self) -> StreamFuture<Self> where | [src] |
Converts this stream into a future of (next_item, tail_of_stream)
. If the stream terminates, then the next item is None
. Read more
fn map<T, F>(self, f: F) -> Map<Self, F> where | [src] |
Maps this stream's items to a different type, returning a new stream of the resulting type. Read more
fn filter<Fut, F>(self, f: F) -> Filter<Self, Fut, F> where | [src] |
Filters the values produced by this stream according to the provided asynchronous predicate. Read more
fn filter_map<Fut, T, F>(self, f: F) -> FilterMap<Self, Fut, F> where | [src] |
Filters the values produced by this stream while simultaneously mapping them to a different type according to the provided asynchronous closure. Read more
fn then<Fut, F>(self, f: F) -> Then<Self, Fut, F> where | [src] |
Computes from this stream's items new items of a different type using an asynchronous closure. Read more
fn collect<C: Default + Extend<Self::Item>>(self) -> Collect<Self, C> where | [src] |
Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more
fn concat(self) -> Concat<Self> where | [src] |
Concatenate all items of a stream into a single extendable destination, returning a future representing the end result. Read more
fn fold<T, Fut, F>(self, init: T, f: F) -> Fold<Self, Fut, T, F> where | [src] |
Execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more
fn flatten(self) -> Flatten<Self> where | [src] |
Flattens a stream of streams into just one continuous stream. Read more
fn skip_while<Fut, F>(self, f: F) -> SkipWhile<Self, Fut, F> where | [src] |
Skip elements on this stream while the provided asynchronous predicate resolves to true
. Read more
fn take_while<Fut, F>(self, f: F) -> TakeWhile<Self, Fut, F> where | [src] |
Take elements from this stream while the provided asynchronous predicate resolves to true
. Read more
fn for_each<Fut, F>(self, f: F) -> ForEach<Self, Fut, F> where | [src] |
Runs this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
fn for_each_concurrent<Fut, F>( | [src] |
Runs this stream to completion, executing the provided asynchronous closure for each element on the stream concurrently as elements become available. Read more
fn take(self, n: u64) -> Take<Self> where | [src] |
Creates a new stream of at most n
items of the underlying stream. Read more
fn skip(self, n: u64) -> Skip<Self> where | [src] |
Creates a new stream which skips n
items of the underlying stream. Read more
fn fuse(self) -> Fuse<Self> where | [src] |
Fuse a stream such that poll_next
will never again be called once it has finished. This method can be used t turn any Stream
into a FusedStream
. Read more
ⓘImportant traits for &'_ mut I
fn by_ref(&mut self) -> &mut Self where | [src] |
Borrows a stream, rather than consuming it. Read more
fn catch_unwind(self) -> CatchUnwind<Self> where | [src] |
Catches unwinding panics while polling the stream. Read more
fn boxed(self) -> Pin<Box<Self>> where | [src] |
Wrap the stream in a Box, pinning it.
fn buffered(self, n: usize) -> Buffered<Self> where | [src] |
An adaptor for creating a buffered list of pending futures. Read more
fn buffer_unordered(self, n: usize) -> BufferUnordered<Self> where | [src] |
An adaptor for creating a buffered list of pending futures (unordered). Read more
fn zip<St>(self, other: St) -> Zip<Self, St> where | [src] |
An adapter for zipping two streams together. Read more
fn chain<St>(self, other: St) -> Chain<Self, St> where | [src] |
Adapter for chaining two stream. Read more
fn peekable(self) -> Peekable<Self> where | [src] |
Creates a new stream which exposes a peek
method. Read more
fn chunks(self, capacity: usize) -> Chunks<Self> where | [src] |
An adaptor for chunking up items of the stream inside a vector. Read more
fn select<St>(self, other: St) -> Select<Self, St> where | [src] |
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
fn forward<S>(self, sink: S) -> Forward<Self, S> where | [src] |
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 | [src] |
Splits this Stream + Sink
object into separate Stream
and Sink
objects. Read more
fn inspect<F>(self, f: F) -> Inspect<Self, F> where | [src] |
Do something with each item of this stream, afterwards passing it on. Read more
ⓘImportant traits for Either<L, R>
fn left_stream<B>(self) -> Either<Self, B> where | [src] |
Wrap this stream in an Either
stream, making it the left-hand variant of that Either
. Read more
ⓘImportant traits for Either<L, R>
fn right_stream<B>(self) -> Either<B, Self> where | [src] |
Wrap this stream in an Either
stream, making it the right-hand variant of that Either
. Read more
fn poll_next_unpin(&mut self, lw: &LocalWaker) -> Poll<Option<Self::Item>> where | [src] |
A convenience method for calling Stream::poll_next
on Unpin
stream types. Read more
fn select_next_some(&mut self) -> SelectNextSome<Self> where | [src] |
impl<S> TryStreamExt for S where
S: TryStream,
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impl<S> TryStreamExt for S where
S: TryStream,
fn err_into<E>(self) -> ErrInto<Self, E> where | [src] |
Wraps the current stream in a new stream which converts the error type into the one provided. Read more
fn map_ok<T, F>(self, f: F) -> MapOk<Self, F> where | [src] |
Wraps the current stream in a new stream which maps the success value using the provided closure. Read more
fn map_err<E, F>(self, f: F) -> MapErr<Self, F> where | [src] |
Wraps the current stream in a new stream which maps the error value using the provided closure. Read more
fn into_stream(self) -> IntoStream<Self> where | [src] |
fn try_next(&mut self) -> TryNext<Self> where | [src] |
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
fn try_for_each<Fut, F>(self, f: F) -> TryForEach<Self, Fut, F> where | [src] |
Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
fn try_skip_while<Fut, F>(self, f: F) -> TrySkipWhile<Self, Fut, F> where | [src] |
Skip elements on this stream while the provided asynchronous predicate resolves to true
. Read more
fn try_for_each_concurrent<Fut, F>( | [src] |
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
fn try_collect<C: Default + Extend<Self::Ok>>(self) -> TryCollect<Self, C> where | [src] |
Attempt to Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more
fn try_filter_map<Fut, F, T>(self, f: F) -> TryFilterMap<Self, Fut, F> where | [src] |
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
fn try_fold<T, Fut, F>(self, init: T, f: F) -> TryFold<Self, Fut, T, F> where | [src] |
Attempt to execute an accumulating asynchronous computation over a stream, collecting all the values into one final result. Read more
fn try_concat(self) -> TryConcat<Self> where | [src] |
Attempt to concatenate all items of a stream into a single extendable destination, returning a future representing the end result. Read more
fn try_buffer_unordered(self, n: usize) -> TryBufferUnordered<Self> where | [src] |
Attempt to execute several futures from a stream concurrently. Read more
fn try_poll_next_unpin( | [src] |
ⓘImportant traits for Compat<W>
fn compat(self) -> Compat<Self> where | [src] |
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}; # let (tx, rx) = futures::channel::oneshot::channel(); Read more
fn into_async_read(self) -> IntoAsyncRead<Self> where | [src] |
Adapter that converts this stream into an [AsyncRead
]. Read more
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error> | [src] |
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId | [src] |
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'_ mut I
fn borrow_mut(&mut self) -> &mut T | [src] |
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error> | [src] |
impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>>,
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impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>>,