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// check-pass
// edition: 2021
#![feature(async_fn_in_trait)]
#![feature(return_position_impl_trait_in_trait)]
#![allow(incomplete_features)]
use std::future::Future;
use std::pin::Pin;
use std::task::Poll;
trait MyTrait {
async fn foo(&self) -> i32;
}
#[derive(Clone)]
struct MyFuture(i32);
impl Future for MyFuture {
type Output = i32;
fn poll(
self: Pin<&mut Self>,
_: &mut std::task::Context<'_>,
) -> Poll<<Self as Future>::Output> {
Poll::Ready(self.0)
}
}
impl MyTrait for i32 {
// FIXME: this should eventually require `#[refine]` to compile, because it also provides
// `Clone`.
fn foo(&self) -> impl Future<Output = i32> + Clone {
MyFuture(*self)
}
}
fn main() {}
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