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use std::pin::Pin; use std::future::Future; use crate::io::{self, Write}; use crate::task::{Context, Poll}; #[doc(hidden)] #[allow(missing_debug_implementations)] pub struct WriteFuture<'a, T: Unpin + ?Sized> { pub(crate) writer: &'a mut T, pub(crate) buf: &'a [u8], } impl<T: Write + Unpin + ?Sized> Future for WriteFuture<'_, T> { type Output = io::Result<usize>; fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> { let buf = self.buf; Pin::new(&mut *self.writer).poll_write(cx, buf) } }