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#![feature(type_alias_impl_trait)]
//@ edition:2021
//@ check-pass
//@ revisions: tait rpit
struct Pending {}
struct CantOpen {}
trait AsyncRead {}
impl AsyncRead for i32 {}
type PendingReader<'a> = impl AsyncRead + 'a;
#[cfg(tait)]
type OpeningReadFuture<'a> = impl std::future::Future<Output = Result<PendingReader<'a>, CantOpen>>;
impl Pending {
async fn read(&mut self) -> Result<impl AsyncRead + '_, CantOpen> {
Ok(42)
}
#[cfg(tait)]
fn read_fut(&mut self) -> OpeningReadFuture<'_> {
self.read()
}
#[cfg(rpit)]
fn read_fut(
&mut self,
) -> impl std::future::Future<Output = Result<PendingReader<'_>, CantOpen>> {
self.read()
}
}
fn main() {}
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