use futures_util::io::{AsyncRead, AsyncWrite};
use pin_project_lite::pin_project;
use std::io::Error;
use std::marker::Unpin;
use std::ops::{Deref, DerefMut};
use std::pin::Pin;
use std::task::{Context, Poll};
pin_project! {
#[derive(Debug)]
pub(crate) struct Fuse<T, U> {
#[pin]
pub t: T,
pub u: U,
}
}
impl<T, U> Fuse<T, U> {
pub(crate) fn new(t: T, u: U) -> Self {
Self { t, u }
}
}
impl<T, U> Deref for Fuse<T, U> {
type Target = T;
fn deref(&self) -> &T {
&self.t
}
}
impl<T, U> DerefMut for Fuse<T, U> {
fn deref_mut(&mut self) -> &mut T {
&mut self.t
}
}
impl<T: AsyncRead + Unpin, U> AsyncRead for Fuse<T, U> {
fn poll_read(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &mut [u8],
) -> Poll<Result<usize, Error>> {
self.project().t.poll_read(cx, buf)
}
}
impl<T: AsyncWrite + Unpin, U> AsyncWrite for Fuse<T, U> {
fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context,
buf: &[u8],
) -> Poll<Result<usize, Error>> {
self.project().t.poll_write(cx, buf)
}
fn poll_flush(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Error>> {
self.project().t.poll_flush(cx)
}
fn poll_close(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Error>> {
self.project().t.poll_close(cx)
}
}