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//@ aux-build:block-on.rs
//@ edition: 2021
//@ run-pass
//@ check-run-results
#![allow(refining_impl_trait)]
#![feature(async_fn_in_dyn_trait)]
//~^ WARN the feature `async_fn_in_dyn_trait` is incomplete
extern crate block_on;
use std::future::Future;
use std::pin::Pin;
trait AsyncTrait {
type Output;
async fn async_dispatch(self: Pin<&mut Self>) -> Self::Output;
}
impl<F> AsyncTrait for F
where
F: Future,
{
type Output = F::Output;
fn async_dispatch(self: Pin<&mut Self>) -> Pin<&mut Self> {
self
}
}
fn main() {
block_on::block_on(async {
let f = std::pin::pin!(async {
println!("hello, world");
});
let x: Pin<&mut dyn AsyncTrait<Output = ()>> = f;
x.async_dispatch().await;
});
}
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