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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

use crate::{Sink, Poll};
use futures_core::task::Context;
use futures_channel::mpsc::{Sender, SendError, TrySendError, UnboundedSender};
use std::pin::Pin;

impl<T> Sink<T> for Sender<T> {
    type SinkError = SendError;

    fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        (*self).poll_ready(cx)
    }

    fn start_send(mut self: Pin<&mut Self>, msg: T) -> Result<(), Self::SinkError> {
        (*self).start_send(msg)
    }

    fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        Poll::Ready(Ok(()))
    }

    fn poll_close(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        self.disconnect();
        Poll::Ready(Ok(()))
    }
}

impl<T> Sink<T> for UnboundedSender<T> {
    type SinkError = SendError;

    fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        UnboundedSender::poll_ready(&*self, cx)
    }

    fn start_send(mut self: Pin<&mut Self>, msg: T) -> Result<(), Self::SinkError> {
        UnboundedSender::start_send(&mut *self, msg)
    }

    fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        Poll::Ready(Ok(()))
    }

    fn poll_close(mut self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        self.disconnect();
        Poll::Ready(Ok(()))
    }
}

impl<'a, T> Sink<T> for &'a UnboundedSender<T> {
    type SinkError = SendError;

    fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        UnboundedSender::poll_ready(*self, cx)
    }

    fn start_send(self: Pin<&mut Self>, msg: T) -> Result<(), Self::SinkError> {
        self.unbounded_send(msg)
            .map_err(TrySendError::into_send_error)
    }

    fn poll_flush(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        Poll::Ready(Ok(()))
    }

    fn poll_close(self: Pin<&mut Self>, _: &mut Context<'_>) -> Poll<Result<(), Self::SinkError>> {
        self.close_channel();
        Poll::Ready(Ok(()))
    }
}