rust/tests/ui/async-await/in-trait/async-example-desugared.rs

//@ check-pass
//@ edition: 2021

use std::future::Future;

trait MyTrait {
    #[allow(async_fn_in_trait)]
    async fn foo(&self) -> i32;
}

impl MyTrait for i32 {
    fn foo(&self) -> impl Future<Output = i32> {
        async { *self }
    }
}

fn main() {}
Add additional tests for static AFIT 2022-10-07 16:15:13 +00:00			`//@ check-pass`
			`//@ edition: 2021`

			`use std::future::Future;`

			`trait MyTrait {`
Bless tests 2023-09-26 20:20:25 +00:00			`#[allow(async_fn_in_trait)]`
Add additional tests for static AFIT 2022-10-07 16:15:13 +00:00			`async fn foo(&self) -> i32;`
			`}`

			`impl MyTrait for i32 {`
Implement refinement lint for RPITIT 2023-09-02 04:02:11 +00:00			`fn foo(&self) -> impl Future<Output = i32> {`
Ensure async trait impls are async (or otherwise return an opaque type) As a workaround for the full `#[refine]` semantics not being implemented yet, forbit returning a concrete future type like `Box<dyn Future>` or a manually implemented Future. `-> impl Future` is still permitted; while that can also cause accidental refinement, that's behind a different feature gate (`return_position_impl_trait_in_trait`) and that problem exists regardless of whether the trait method is async, so will have to be solved more generally. Fixes #102745 2022-11-02 17:45:08 -07:00			`async { *self }`
Add additional tests for static AFIT 2022-10-07 16:15:13 +00:00			`}`
			`}`

			`fn main() {}`