Zero-cost asynchronous programming in Rust

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futures-rs is a library providing the foundations for asynchronous programming in Rust. It includes key trait definitions like Stream, as well as utilities like join!, select!, and various futures combinator methods which enable expressive asynchronous control flow.

Usage

Add this to your Cargo.toml:

[dependencies]
futures = "0.3"

Now, you can use futures-rs:

use futures::future::Future;

The current futures-rs requires Rust 1.39 or later.

Feature std

Futures-rs works without the standard library, such as in bare metal environments. However, it has a significantly reduced API surface. To use futures-rs in a #[no_std] environment, use:

[dependencies]
futures = { version = "0.3.4", default-features = false }

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in futures-rs by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.