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//~| NOTE: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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