futures-enum

#[derive(Future, Stream, Sink, AsyncRead, AsyncWrite)] for enums.

Usage

Add this to your Cargo.toml:

[dependencies]
futures-enum = "0.1.1"

Now, you can use futures-enum:

use futures_enum::*;

The current version of futures-enum requires Rust nightly 2019-01-11 or later.

Examples

use futures::future::{self, Future};
use futures_enum::*;

#[derive(Future, Stream, Sink, AsyncRead, AsyncWrite)]
enum Either<A, B> {
    A(A),
    B(B),
}

fn foo(x: i32) -> impl Future<Output = i32> {
    if x < 0 {
        Either::A(future::lazy(|_| 1))
    } else {
        Either::B(future::ready(x))
    }
}

See auto_enums for how to automate patterns like this.

Supported traits

• Future
• Stream
• Sink
• AsyncRead
• AsyncWrite

See auto_enums#11 for other traits.

License

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 the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.