futures_util - futures

Modules

AsyncBufRead
AsyncBufReadExt An extension trait which adds utility methods to AsyncBufRead types.
AsyncRead
AsyncReadExt An extension trait which adds utility methods to AsyncRead types.
AsyncSeek
AsyncSeekExt An extension trait which adds utility methods to AsyncSeek types.
AsyncWrite
AsyncWriteExt An extension trait which adds utility methods to AsyncWrite types.
Future
FutureExt An extension trait for Futures that provides a variety of convenient adapters.
Sink
SinkExt An extension trait for Sinks that provides a variety of convenient combinator functions.
Stream
StreamExt An extension trait for Streams that provides a variety of convenient combinator functions.
TryFuture
TryFutureExt Adapters specific to Result-returning futures
TryStream
TryStreamExt Adapters specific to Result-returning streams

join Polls multiple futures simultaneously, returning a tuple of all results once complete.
pending A macro which yields to the event loop once.
pin_mut
poll A macro which returns the result of polling a future once within the current async context.
ready
select Polls multiple futures and streams simultaneously, executing the branch for the future that finishes first. If multiple futures are ready, one will be pseudo-randomly selected at runtime. Futures directly passed to select! must be Unpin and implement FusedFuture.
select_biased Polls multiple futures and streams simultaneously, executing the branch for the future that finishes first. Unlike [select!], if multiple futures are ready, one will be selected in order of declaration. Futures directly passed to select_biased! must be Unpin and implement FusedFuture.
stream_select Combines several streams, all producing the same Item type, into one stream. This is similar to select_all but does not require the streams to all be the same type. It also keeps the streams inline, and does not require Box<dyn Stream>s to be allocated. Streams passed to this macro must be Unpin.
try_join Polls multiple futures simultaneously, resolving to a Result containing either a tuple of the successful outputs or an error.