| //@ build-pass |
| //@ edition: 2021 |
| |
| // Demonstrates that an async closure may implement `FnMut` (not just `async FnMut`!) |
| // if it has no self-borrows. In this case, `&Ty` is not borrowed from the closure env, |
| // since it's fine to reborrow it with its original lifetime. See the doc comment on |
| // `should_reborrow_from_env_of_parent_coroutine_closure` for more detail for when we |
| // must borrow from the closure env. |
| |
| #![feature(async_closure)] |
| |
| fn main() { |
| hello(&Ty); |
| } |
| |
| fn needs_fn_mut<T>(mut x: impl FnMut() -> T) { |
| x(); |
| } |
| |
| fn hello(x: &Ty) { |
| needs_fn_mut(async || { x.hello(); }); |
| } |
| |
| struct Ty; |
| impl Ty { |
| fn hello(&self) {} |
| } |
