Crate futures_util

Combinators and utilities for working with Futures, Streams, Sinks, and the AsyncRead and AsyncWrite traits.

Modules

compat	Futures 0.1 / 0.3 shims
future	Futures
io	IO
lock	Futures-powered synchronization primitives.
never	Definition of the Never type, a stand-in for the ! type until it becomes stable.
sink	Sinks
stream	Streams
task	Task notification
try_future	Futures
try_stream	Streams

Macros

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	Pins a value on the stack.
poll	A macro which returns the result of polling a future once within the current async context.
ready	Extracts the successful type of a Poll<T>.
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 passed to select! must be Unpin and implement FusedFuture. Futures and streams which are not already fused can be fused using the .fuse() method. Note, though, that fusing a future or stream directly in the call to select! will not be enough to prevent it from being polled after completion if the select! call is in a loop, so when select!ing in a loop, users should take care to fuse() outside of the loop.
try_join	Polls multiple futures simultaneously, resolving to a Result containing either a tuple of the successful outputs or an error.