1use futures_core::future::Future;
2use futures_core::task::{Context, Poll};
3use futures_io::AsyncWrite;
4use std::io;
5use std::pin::Pin;
6
7/// Future for the [`close`](super::AsyncWriteExt::close) method.
8#[derive(Debug)]
9#[must_use = "futures do nothing unless you `.await` or poll them"]
10pub struct Close<'a, W: ?Sized> {
11 writer: &'a mut W,
12}
13
14impl<W: ?Sized + Unpin> Unpin for Close<'_, W> {}
15
16impl<'a, W: AsyncWrite + ?Sized + Unpin> Close<'a, W> {
17 pub(super) fn new(writer: &'a mut W) -> Self {
18 Self { writer }
19 }
20}
21
22impl<W: AsyncWrite + ?Sized + Unpin> Future for Close<'_, W> {
23 type Output = io::Result<()>;
24
25 fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
26 Pin::new(&mut *self.writer).poll_close(cx)
27 }
28}
29