# futures-rs
This library is an implementation of **zero-cost futures** in Rust.
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[Documentation](https://docs.rs/futures)
[Tutorial](https://tokio.rs/docs/getting-started/futures/)
## Usage
First, add this to your `Cargo.toml`:
```toml
[dependencies]
futures = "0.1.13"
```
Next, add this to your crate:
```rust
extern crate futures;
use futures::Future;
```
For more information about how you can use futures with async I/O you can take a
look at [https://tokio.rs](https://tokio.rs) which is an introduction to both
the Tokio stack and also futures.
### Feature `use_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:
```toml
[dependencies]
futures = { version = "0.1.13", default-features = false }
```
# License
`futures-rs` is primarily distributed under the terms of both the MIT license and
the Apache License (Version 2.0), with portions covered by various BSD-like
licenses.
See LICENSE-APACHE, and LICENSE-MIT for details.