Crate futures_enum

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

Examples

use futures_enum::*;
use std::future::Future;

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

fn foo(x: i32) -> impl Future<Output = i32> {
    if x < 0 { Either::A(async { 1 }) } else { Either::B(async move { x }) }
}

futures-enum works well even if the dependency contains only sub-crates such as futures-core, futures-io, futures-sink, etc.

See auto_enums crate for how to automate patterns like this.

Supported traits

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

Derive Macros

AsyncBufRead
AsyncRead
AsyncSeek
AsyncWrite
Future
Sink
Stream