Crate futures_enum

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

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.

In version 0.1.3 or later, it works well even if the dependency contains only sub-crates such as futures-core, futures-util, etc.

Supported traits

• Future - generated code
• Stream - generated code
• Sink - generated code
• AsyncRead - generated code
• AsyncWrite - generated code

See this issue for other traits.

Derive Macros

AsyncRead
AsyncWrite
Future
Sink
Stream