| //@ edition:2018 | |
| //@ check-pass | |
| #![feature(unboxed_closures)] | |
| use std::future::Future; | |
| async fn wrapper<F>(f: F) | |
| where for<'a> F: FnOnce<(&'a mut i32,)>, | |
| for<'a> <F as FnOnce<(&'a mut i32,)>>::Output: Future<Output=()> + 'a | |
| { | |
| let mut i = 41; | |
| f(&mut i).await; | |
| } | |
| async fn add_one(i: &mut i32) { | |
| *i = *i + 1; | |
| } | |
| fn main() {} |