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//@ edition:2021
#![feature(rustc_attrs)]
#![allow(unused)]
struct Point {
x: i32,
y: i32,
}
struct Wrapper {
p: Point,
}
fn main() {
let mut w = Wrapper { p: Point { x: 10, y: 10 } };
// Only paths that appears within the closure that directly start off
// a variable defined outside the closure are captured.
//
// Therefore `w.p` is captured
// Note that `wp.x` doesn't start off a variable defined outside the closure.
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//~| NOTE: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
|| {
//~^ ERROR: First Pass analysis includes:
//~| ERROR: Min Capture analysis includes:
let wp = &w.p;
//~^ NOTE: Capturing w[(0, 0)] -> Immutable
//~| NOTE: Min Capture w[(0, 0)] -> Immutable
println!("{}", wp.x);
};
// Since `c` captures `w.p` by an ImmBorrow, `w.p.y` can't be mutated.
let py = &mut w.p.y;
c();
*py = 20
}
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