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use std::pin::Pin;
use std::task::{Context, Poll};
use futures_core::ready;
use pin_project_lite::pin_project;
use crate::actor::Actor;
use crate::fut::{ActorFuture, ActorStream};
pin_project! {
#[derive(Debug)]
#[must_use = "streams do nothing unless polled"]
pub struct Finish<S> {
#[pin]
pub(crate) stream: S
}
}
impl<S> Finish<S> {
pub fn new(stream: S) -> Finish<S> {
Finish { stream }
}
}
impl<S, A> ActorFuture<A> for Finish<S>
where
S: ActorStream<A>,
A: Actor,
{
type Output = ();
fn poll(
mut self: Pin<&mut Self>,
act: &mut A,
ctx: &mut A::Context,
task: &mut Context<'_>,
) -> Poll<()> {
let mut this = self.as_mut().project();
while ready!(this.stream.as_mut().poll_next(act, ctx, task)).is_some() {}
Poll::Ready(())
}
}