rust/src/test/ui/async-await/issues/issue-55324.rs

// build-pass (FIXME(62277): could be check-pass?)
// edition:2018

use std::future::Future;

async fn foo<F: Future<Output = i32>>(x: &i32, future: F) -> i32 {
    let y = future.await;
    *x + y
}

fn main() {}
Migrate compile-pass annotations to build-pass 2019-07-02 16:30:28 -05:00			`// build-pass (FIXME(62277): could be 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 foo<F: Future<Output = i32>>(x: &i32, future: F) -> i32 {`
Reduce reliance on feature(await_macro). 2019-07-03 17:25:14 -05:00			`let y = future.await;`
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			`*x + y`
			`}`

			`fn main() {}`