| //@ edition:2021 |
| |
| #![feature(rustc_attrs)] |
| |
| struct Point { |
| x: i32, |
| y: i32, |
| } |
| |
| fn main() { |
| let mut p = Point { x: 10, y: 10 }; |
| |
| let c = #[rustc_capture_analysis] |
| //~^ ERROR: attributes on expressions are experimental |
| //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> |
| //~| NOTE: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| || { |
| //~^ First Pass analysis includes: |
| //~| Min Capture analysis includes: |
| println!("{}", p.x); |
| //~^ NOTE: Capturing p[(0, 0)] -> ImmBorrow |
| //~| NOTE: Min Capture p[(0, 0)] -> ImmBorrow |
| }; |
| |
| // `c` should only capture `p.x`, therefore mutating `p.y` is allowed. |
| let py = &mut p.y; |
| |
| c(); |
| *py = 20; |
| } |