rust/tests/ui/async-await/in-trait/cycle-if-impl-doesnt-apply.rs

40 lines
816 B
Rust

//@ check-pass
//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
//@ edition: 2024
// Regression test for <https://github.com/rust-lang/trait-system-refactor-initiative/issues/185>.
// Avoid unnecessarily computing the RPITIT type of the first impl when checking the WF of the
// second impl, since the first impl relies on the hidden type of the second impl.
use std::future::Future;
trait Handler {}
struct W<T>(T);
trait SendTarget {
fn call(self) -> impl Future<Output = ()> + Send;
}
impl<T> SendTarget for W<T>
where
T: Handler + Send,
{
async fn call(self) {
todo!()
}
}
impl<T> SendTarget for T
where
T: Handler + Send,
{
async fn call(self) {
W(self).call().await
}
}
fn main() {}