src/test/ui/async-await/in-trait/async-example-desugared-boxed-in-trait.rs

   1 // edition: 2021
   2
   3 #![feature(async_fn_in_trait)]
   4 #![feature(return_position_impl_trait_in_trait)]
   5 #![allow(incomplete_features)]
   6
   7 use std::future::Future;
   8 use std::pin::Pin;
   9
  10 trait MyTrait {
  11     fn foo(&self) -> Pin<Box<dyn Future<Output = i32> + '_>>;
  12 }
  13
  14 impl MyTrait for i32 {
  15     async fn foo(&self) -> i32 {
  16         //~^ ERROR method `foo` has an incompatible type for trait
  17         *self
  18     }
  19 }
  20
  21 fn main() {}