dope-fiber 0.11.0

The manifold runtime
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

use std::pin::Pin;
use std::task::Poll;

use pin_project::pin_project;

use super::{Context, Fiber};

pub enum Either<L, R> {
    Left(L),
    Right(R),
}

#[pin_project]
pub struct Race<L, R> {
    #[pin]
    left: L,
    #[pin]
    right: R,
}

impl<L, R> Race<L, R> {
    pub(super) const fn new(left: L, right: R) -> Self {
        Self { left, right }
    }
}

impl<'d, L, R> Fiber<'d> for Race<L, R>
where
    L: Fiber<'d>,
    R: Fiber<'d>,
{
    type Output = Either<L::Output, R::Output>;

    fn poll(self: Pin<&mut Self>, mut cx: Pin<&mut Context<'_, 'd>>) -> Poll<Self::Output> {
        let this = self.project();
        if let Poll::Ready(output) = Fiber::poll(this.left, cx.as_mut()) {
            return Poll::Ready(Either::Left(output));
        }
        Fiber::poll(this.right, cx).map(Either::Right)
    }
}