diff options
Diffstat (limited to 'tests/ui/closures/2229_closure_analysis/multilevel-path-1.rs')
-rw-r--r-- | tests/ui/closures/2229_closure_analysis/multilevel-path-1.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/closures/2229_closure_analysis/multilevel-path-1.rs b/tests/ui/closures/2229_closure_analysis/multilevel-path-1.rs new file mode 100644 index 000000000..a8a2acfa7 --- /dev/null +++ b/tests/ui/closures/2229_closure_analysis/multilevel-path-1.rs @@ -0,0 +1,39 @@ +// 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> + || { + //~^ ERROR: First Pass analysis includes: + //~| ERROR: Min Capture analysis includes: + let wp = &w.p; + //~^ NOTE: Capturing w[(0, 0)] -> ImmBorrow + //~| NOTE: Min Capture w[(0, 0)] -> ImmBorrow + 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 +} |