Module futures_util::stream

Asynchronous streams.

This module contains:

• The Stream trait, for objects that can asynchronously produce a sequence of values.
• The StreamExt and TryStreamExt trait, which provides adapters for chaining and composing streams.
• Top-level stream constructors like iter which creates a stream from an iterator.

Structs

• All
  Future for the all method.
• AndThen
  Stream for the and_then method.
• Any
  Future for the any method.
• Chain
  Stream for the chain method.
• Collect
  Future for the collect method.
• Concat
  Future for the concat method.
• Count
  Future for the count method.
• Cycle
  Stream for the cycle method.
• Empty
  Stream for the empty function.
• Enumerate
  Stream for the enumerate method.
• ErrInto
  Stream for the err_into method.
• Filter
  Stream for the filter method.
• FilterMap
  Stream for the filter_map method.
• FlatMap
  Stream for the flat_map method.
• Flatten
  Stream for the flatten method.
• Fold
  Future for the fold method.
• ForEach
  Future for the for_each method.
• Forward
  Future for the forward method.
• Fuse
  Stream for the fuse method.
• Inspect
  Stream for the inspect method.
• InspectErr
  Stream for the inspect_err method.
• InspectOk
  Stream for the inspect_ok method.
• IntoStream
  Stream for the into_stream method.
• Iter
  Stream for the iter function.
• Map
  Stream for the map method.
• MapErr
  Stream for the map_err method.
• MapOk
  Stream for the map_ok method.
• Next
  Future for the next method.
• NextIf
  Future for the Peekable::next_if method.
• NextIfEq
  Future for the Peekable::next_if_eq method.
• Once
  A stream which emits single element and then EOF.
• OrElse
  Stream for the or_else method.
• Peek
  Future for the Peekable::peek method.
• PeekMut
  Future for the Peekable::peek_mut method.
• Peekable
  A Stream that implements a peek method.
• Pending
  Stream for the pending() function.
• PollFn
  Stream for the poll_fn function.
• PollImmediate
  Stream for the poll_immediate function.
• Repeat
  Stream for the repeat function.
• RepeatWith
  An stream that repeats elements of type A endlessly by applying the provided closure F: FnMut() -> A.
• Scan
  Stream for the scan method.
• Select
  Stream for the select() function.
• SelectNextSome
  Future for the select_next_some method.
• SelectWithStrategy
  Stream for the select_with_strategy() function. See function docs for details.
• Skip
  Stream for the skip method.
• SkipWhile
  Stream for the skip_while method.
• StreamFuture
  Future for the into_future method.
• Take
  Stream for the take method.
• TakeUntil
  Stream for the take_until method.
• TakeWhile
  Stream for the take_while method.
• Then
  Stream for the then method.
• TryAll
  Future for the try_all method.
• TryAny
  Future for the try_any method.
• TryCollect
  Future for the try_collect method.
• TryConcat
  Future for the try_concat method.
• TryFilter
  Stream for the try_filter method.
• TryFilterMap
  Stream for the try_filter_map method.
• TryFlatten
  Stream for the try_flatten method.
• TryFold
  Future for the try_fold method.
• TryForEach
  Future for the try_for_each method.
• TryNext
  Future for the try_next method.
• TrySkipWhile
  Stream for the try_skip_while method.
• TryTakeWhile
  Stream for the try_take_while method.
• TryUnfold
  Stream for the try_unfold function.
• Unfold
  Stream for the unfold function.
• Unzip
  Future for the unzip method.
• Zip
  Stream for the zip method.

Enums

• PollNext
  Type to tell SelectWithStrategy which stream to poll next.

Traits

• FusedStream
  A stream 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

Functions

• empty
  Creates a stream which contains no elements.
• iter
  Converts an Iterator into a Stream which is always ready to yield the next value.
• once
  Creates a stream of a single element.
• pending
  Creates a stream which never returns any elements.
• poll_fn
  Creates a new stream wrapping a function returning Poll<Option<T>>.
• poll_immediate
  Creates a new stream that always immediately returns Poll::Ready when awaiting it.
• repeat
  Create a stream which produces the same item repeatedly.
• repeat_with
  Creates a new stream that repeats elements of type A endlessly by applying the provided closure, the repeater, F: FnMut() -> A.
• select
  This function 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.
• select_with_strategy
  This function will attempt to pull items from both streams. You provide a closure to tell SelectWithStrategy which stream to poll. The closure can store state on SelectWithStrategy to which it will receive a &mut on every invocation. This allows basing the strategy on prior choices.
• try_unfold
  Creates a TryStream from a seed and a closure returning a TryFuture.
• unfold
  Creates a Stream from a seed and a closure returning a Future.