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// check-pass
// edition:2021
use std::fmt::{self, Display};
use std::future::Future;
use std::io;
use std::pin::Pin;
use std::task::{Context, Poll};
struct AsyncStdout;
impl AsyncStdout {
fn write_fmt<'a>(&'a mut self, _args: fmt::Arguments) -> WriteFmtFuture<'a, Self>
where
Self: Unpin,
{
WriteFmtFuture(self)
}
}
struct WriteFmtFuture<'a, T>(&'a mut T);
impl<'a, T> Future for WriteFmtFuture<'a, T> {
type Output = io::Result<()>;
fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> {
unimplemented!()
}
}
async fn async_main() {
let _write = write!(&mut AsyncStdout, "...").await;
let _writeln = writeln!(&mut AsyncStdout, "...").await;
}
fn main() {
let _ = async_main;
}
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