rust/tests/ui/async-await/multiple-lifetimes/ret-impl-trait-fg.rs

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//@ edition:2018
//@ run-pass
2021-04-29 09:31:44 -05:00
// Test member constraints that appear in the `impl Trait`
// return type of an async function.
// (This used to require a feature gate.)
trait Trait<'a, 'b> { }
impl<T> Trait<'_, '_> for T { }
async fn async_ret_impl_trait<'a, 'b>(a: &'a u8, b: &'b u8) -> impl Trait<'a, 'b> {
(a, b)
}
fn main() {
let _ = async_ret_impl_trait(&22, &44);
}