rust/tests/ui/async-await/issues/issue-59001.rs

// check-pass
// edition:2018

use std::future::Future;

async fn enter<'a, F, R>(mut callback: F)
where
    F: FnMut(&'a mut i32) -> R,
    R: Future<Output = ()> + 'a,
{
    unimplemented!()
}

fn main() {}
Moving more build-pass tests to check-pass One or two tests became build-pass without the FIXME because they really needed build-pass (were failing without it). Helps with #62277 2020-04-19 19:27:28 -05:00			`// check-pass`
Refactor async fn return type lowering async fn now lowers directly to an existential type declaration rather than reusing the `impl Trait` return type lowering. As part of this, it lowers all argument-position elided lifetimes using the in-band-lifetimes machinery, creating fresh parameter names for each of them, using each lifetime parameter as a generic argument to the generated existential type. This doesn't currently successfully allow multiple argument-position elided lifetimes since `existential type` doesn't yet support multiple lifetimes where neither outlive the other. This requires a separate fix. 2019-03-13 19:42:23 -05:00			`// edition:2018`

			`use std::future::Future;`

			`async fn enter<'a, F, R>(mut callback: F)`
			`where`
			`F: FnMut(&'a mut i32) -> R,`
			`R: Future<Output = ()> + 'a,`
			`{`
			`unimplemented!()`
			`}`

			`fn main() {}`