Lib.rs

Cargo Features

[dependencies]
futures-util = { version = "0.3.32", default-features = false, features = ["std", "alloc", "async-await", "async-await-macro", "compat", "io-compat", "sink", "io", "channel", "portable-atomic", "unstable", "bilock", "write-all-vectored", "cfg-target-has-atomic", "spin"] }

default = async-await, async-await-macro, std

These default features are set whenever futures-util is added without default-features = false somewhere in the dependency tree.

std default channel? compat? io? = alloc

Enables std of futures-core, futures-task, and slab

Affects future::FutureExt.catch_unwind, stream::StreamExt.catch_unwind, future::FutureExt.remote_handle, futures-util::io, try_stream::TryStreamExt.into_async_read, spawn::SpawnExt.spawn_with_handle, spawn::LocalSpawnExt.spawn_local_with_handle, future::FutureExt.shared…

alloc std = slab

Enables alloc of futures-core and futures-task

Affects future::FutureExt.boxed, future::FutureExt.boxed_local, futures-util::lock, sink::SinkExt.buffer, stream::futures_unordered, stream::select_all, stream::StreamExt.flatten_unordered, stream::StreamExt.flat_map_unordered, stream::StreamExt.for_each_concurrent, stream::StreamExt.boxed, stream::StreamExt.boxed_local, stream::StreamExt.buffered, stream::StreamExt.buffer_unordered, stream::StreamExt.chunks, stream::StreamExt.ready_chunks, try_stream::TryStreamExt.try_for_each_concurrent, try_stream::TryStreamExt.try_chunks, try_stream::TryStreamExt.try_ready_chunks, try_stream::TryStreamExt.try_flatten_unordered, try_stream::TryStreamExt.try_buffer_unordered…

async-await default async-await-macro

async-await-macro default = async-await, futures-macro

compat io-compat? = futures_01, libc, std

Affects try_future::TryFutureExt.compat, futures-util::compat, sink::SinkExt.compat, try_stream::TryStreamExt.compat, spawn::SpawnExt.compat…

io-compat = compat, io, libc, tokio-io

Affects io::AsyncReadExt.compat, io::AsyncWriteExt.compat_write…

sink = futures-sink

Affects compat01as03::Sink01CompatExt, compat01as03::Compat01As03Sink, compat03as01::CompatSink, try_future::TryFutureExt.flatten_sink, io::AsyncWriteExt.into_sink, futures-util::sink, stream::StreamExt.forward, stream::StreamExt.split…

io io-compat? write-all-vectored? = futures-io, memchr, std

Affects futures-util::io, try_stream::TryStreamExt.into_async_read…

channel = futures-channel, std

Affects future::FutureExt.remote_handle, spawn::SpawnExt.spawn_with_handle, spawn::LocalSpawnExt.spawn_local_with_handle…

portable-atomic

Enables portable-atomic of futures-core

unstable

Unstable features These features are outside of the normal semver guarantees and require the unstable feature as an explicit opt-in to unstable API.

Enables unstable of futures-core and futures-task

bilock

Affects bilock::BiLockAcquire…

write-all-vectored = io

Affects io::AsyncWriteExt.write_all_vectored…

cfg-target-has-atomic

These features are no longer used.
TODO: remove in the next major version.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

futures-channel channel?

futures-io io?

futures-sink sink?

futures-macro async-await-macro

slab alloc? std

memchr io?

futures_01 compat?

Enables futures ^0.1.25

tokio-io io-compat?

spin implicit feature

Enables spin

spin:

Spin-based synchronization primitives

Affects future::FutureExt.shared…

libc compat? io-compat?

Enables libc

INDIRECT DEPENDENCYS BUT ONLY FOR SPECIFIC MINIMAL VERSIONS