1 use std::pin::Pin;
2 use std::future::Future;
3 
4 use crate::io::{self, Write};
5 use crate::task::{Context, Poll};
6 
7 #[doc(hidden)]
8 #[allow(missing_debug_implementations)]
9 pub struct FlushFuture<'a, T: Unpin + ?Sized> {
10     pub(crate) writer: &'a mut T,
11 }
12 
13 impl<T: Write + Unpin + ?Sized> Future for FlushFuture<'_, T> {
14     type Output = io::Result<()>;
15 
poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>16     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
17         Pin::new(&mut *self.writer).poll_flush(cx)
18     }
19 }
20