Cargo Features
[dependencies]
futures-util = { version = "0.3.31", 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"] }- default = async-await, async-await-macro, std
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These default features are set whenever
futures-utilis added withoutdefault-features = false - std default channel? compat? io? = alloc, slab
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Enables std of futures-core and futures-task
Affects
future::FutureExt.catch_unwind,future::FutureExt.shared,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… - alloc std
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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, std
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Affects
try_future::TryFutureExt.compat,futures-util::compat,sink::SinkExt.compat,try_stream::TryStreamExt.compat,spawn::SpawnExt.compat… - io-compat = compat, io, tokio-io
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Affects
io::AsyncReadExt.compat,io::AsyncWriteExt.compat_write… - sink = futures-sink
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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
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Affects
futures-util::io,try_stream::TryStreamExt.into_async_read… - channel = futures-channel, std
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Affects
future::FutureExt.remote_handle,spawn::SpawnExt.spawn_with_handle,spawn::LocalSpawnExt.spawn_local_with_handle… - portable-atomic
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Enables portable-atomic of futures-core
- unstable
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Unstable features These features are outside of the normal semver guarantees and require the
unstablefeature as an explicit opt-in to unstable API.Enables unstable of futures-core and futures-task
- bilock
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Affects
bilock::BiLockAcquire… - write-all-vectored = io
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Affects
io::AsyncWriteExt.write_all_vectored… - cfg-target-has-atomic
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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.