Module futures::stream

Asynchronous streams.

This module contains:

• The Stream trait, for objects that can asynchronously produce a sequence of values.
• The StreamExt trait, which provides adapters for chaining and composing streams.
• Top-level stream contructors like iter_ok which creates a stream from an iterator, and futures_unordered, which constructs a stream from a collection of futures.

Structs

BufferUnordered	An adaptor for a stream of futures to execute the futures concurrently, if possible, delivering results as they become available.
Buffered	An adaptor for a stream of futures to execute the futures concurrently, if possible.
CatchUnwind	Stream for the catch_unwind combinator.
Chain	An adapter for chaining the output of two streams.
Chunks	An adaptor that chunks up elements in a vector.
Collect	A future which collects all of the values of a stream into a vector.
Concat	A stream combinator to concatenate the results of a stream into the first yielded item.
Empty	A stream which contains no elements.
ErrInto	Stream for the err_into combinator.
Filter	A stream combinator used to filter the results of a stream and only yield some values.
FilterMap	A combinator used to filter the results of a stream and simultaneously map them to a different type.
Flatten	A combinator used to flatten a stream-of-streams into one long stream of elements.
Fold	A future used to collect all the results of a stream into one generic type.
ForEach	A stream combinator which executes a unit closure over each item on a stream.
Forward	Future for the Stream::forward combinator, which sends a stream of values to a sink and then flushes the sink.
Fuse	A stream which "fuse"s a stream once it's terminated.
FuturesOrdered	An unbounded queue of futures.
FuturesUnordered	A set of futures which may complete in any order.
Inspect	Do something with the items of a stream, passing it on.
IntoStream	Stream for the into_stream combinator.
Iter	A stream which is just a shim over an underlying instance of Iterator.
LocalStreamObj	A custom trait object for polling streams, roughly akin to Box<dyn Stream<Item = T> + 'a>.
Map	A stream combinator which will change the type of a stream from one type to another.
Next	A future of the next element of a stream.
Once	A stream which emits single element and then EOF.
Peekable	A Stream that implements a peek method.
PollFn	A stream which adapts a function returning Poll.
Repeat	Stream that produces the same element repeatedly.
ReuniteError	Error indicating a SplitSink<S> and SplitStream<S> were not two halves of a Stream + Split, and thus could not be reunited.
Select	An adapter for merging the output of two streams.
SelectAll	An unbounded set of streams
Skip	A stream combinator which skips a number of elements before continuing.
SkipWhile	A stream combinator which skips elements of a stream while a predicate holds.
SplitSink	A Sink part of the split pair
SplitStream	A Stream part of the split pair
StreamFuture	A combinator used to temporarily convert a stream into a future.
StreamObj	A custom trait object for polling streams, roughly akin to Box<dyn Stream<Item = T> + Send + 'a>.
Take	A stream combinator which returns a maximum number of elements.
TakeWhile	A stream combinator which takes elements from a stream while a predicate holds.
Then	A stream combinator which chains a computation onto each item produced by a stream.
TryBufferUnordered	A stream returned by the try_buffer_unordered method
TryCollect	A future which attempts to collect all of the values of a stream.
TryFold	The future for the TryStream::fold method.
TryForEach	A stream combinator which attempts to execute an async closure over each future in a stream.
TryNext	A future which attempts to collect all of the values of a stream.
TrySkipWhile	A stream combinator which skips elements of a stream while a predicate holds.
Unfold	A stream which creates futures, polls them and return their result
Zip	An adapter for merging the output of two streams.

Traits

FusedStream	A Stream or TryStream which tracks whether or not the underlying stream should no longer be polled.
Stream	A stream of values produced asynchronously.
StreamExt	An extension trait for Streams that provides a variety of convenient combinator functions.
TryStream	A convenience for streams that return Result values that includes a variety of adapters tailored to such futures.
TryStreamExt	Adapters specific to Result-returning streams
UnsafeStreamObj	A custom implementation of a stream trait object for StreamObj, providing a hand-rolled vtable.

Functions

empty	Creates a stream which contains no elements.
futures_ordered	Converts a list of futures into a Stream of results from the futures.
futures_unordered	Converts a list of futures into a Stream of outputs from the futures.
iter	Converts an Iterator into a Stream which is always ready to yield the next value.
once	Creates a stream of single element
poll_fn	Creates a new stream wrapping around a function returning Poll.
repeat	Create a stream which produces the same item repeatedly.
select_all	Convert a list of streams into a Stream of results from the streams.
unfold	Creates a Stream from a seed and a closure returning a Future.