| use core::marker::PhantomData; |
| use core::pin::Pin; |
| use futures_core::future::Future; |
| use futures_core::task::{Context, Poll}; |
| use futures_sink::Sink; |
| |
| /// Future for the [`close`](super::SinkExt::close) method. |
| #[derive(Debug)] |
| #[must_use = "futures do nothing unless polled"] |
| pub struct Close<'a, Si: Sink<Item> + Unpin + ?Sized, Item> { |
| sink: &'a mut Si, |
| _phantom: PhantomData<fn(Item)>, |
| } |
| |
| /// A future that completes when the sink has finished closing. |
| /// |
| /// The sink itself is returned after closeing is complete. |
| impl<'a, Si: Sink<Item> + Unpin + ?Sized, Item> Close<'a, Si, Item> { |
| pub(super) fn new(sink: &'a mut Si) -> Self { |
| Close { |
| sink, |
| _phantom: PhantomData, |
| } |
| } |
| } |
| |
| impl<Si: Sink<Item> + Unpin + ?Sized, Item> Future for Close<'_, Si, Item> { |
| type Output = Result<(), Si::SinkError>; |
| |
| fn poll( |
| mut self: Pin<&mut Self>, |
| cx: &mut Context<'_>, |
| ) -> Poll<Self::Output> { |
| Pin::new(&mut self.sink).poll_close(cx) |
| } |
| } |