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use std::pin::Pin;
use std::task::{Context, Poll};
use crate::actor::Actor;
use crate::fut::{ActorFuture, ActorStream};
pin_project_lite::pin_project! {
#[must_use = "streams do nothing unless polled"]
#[derive(Debug)]
pub struct StreamFinish<S: ActorStream> {
#[pin]
stream: S
}
}
pub fn new<S: ActorStream>(stream: S) -> StreamFinish<S> {
StreamFinish { stream }
}
impl<S: ActorStream> ActorFuture for StreamFinish<S> {
type Output = ();
type Actor = S::Actor;
fn poll(
mut self: Pin<&mut Self>,
act: &mut S::Actor,
ctx: &mut <S::Actor as Actor>::Context,
task: &mut Context<'_>,
) -> Poll<()> {
loop {
match self.as_mut().project().stream.poll_next(act, ctx, task) {
Poll::Pending => return Poll::Pending,
Poll::Ready(None) => return Poll::Ready(()),
Poll::Ready(Some(_)) => (),
};
}
}
}