25 lines
617 B
Rust
25 lines
617 B
Rust
//@ build-pass
|
|
//@ edition: 2021
|
|
|
|
// Demonstrates that an async closure may implement `FnMut` (not just `AsyncFnMut`!)
|
|
// 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.
|
|
|
|
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) {}
|
|
}
|