mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
17 lines
479 B
Rust
17 lines
479 B
Rust
// This is not exactly right, yet.
|
|
|
|
// Ideally we should be suggesting `as_mut` for the first case,
|
|
// and suggesting to change `as_ref` to `as_mut` in the second.
|
|
|
|
fn x(cb: &mut Option<&mut dyn FnMut()>) {
|
|
cb.map(|cb| cb());
|
|
//~^ ERROR cannot move out of `*cb` which is behind a mutable reference
|
|
}
|
|
|
|
fn x2(cb: &mut Option<&mut dyn FnMut()>) {
|
|
cb.as_ref().map(|cb| cb());
|
|
//~^ ERROR cannot borrow `*cb` as mutable, as it is behind a `&` reference
|
|
}
|
|
|
|
fn main() {}
|