diff options
Diffstat (limited to 'src/test/ui/closures/2229_closure_analysis/by_value.rs')
-rw-r--r-- | src/test/ui/closures/2229_closure_analysis/by_value.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/test/ui/closures/2229_closure_analysis/by_value.rs b/src/test/ui/closures/2229_closure_analysis/by_value.rs new file mode 100644 index 000000000..d8d3bbee2 --- /dev/null +++ b/src/test/ui/closures/2229_closure_analysis/by_value.rs @@ -0,0 +1,37 @@ +// edition:2021 + +// Test that we handle derferences properly when only some of the captures are being moved with +// `capture_disjoint_fields` enabled. +#![feature(rustc_attrs)] + +#[derive(Debug, Default)] +struct SomeLargeType; +struct MuchLargerType([SomeLargeType; 32]); + +// Ensure that we don't capture any derefs when moving captures into the closures, +// i.e. only data from the enclosing stack is moved. +fn big_box() { + let s = MuchLargerType(Default::default()); + let b = Box::new(s); + let t = (b, 10); + + let c = #[rustc_capture_analysis] + //~^ ERROR: attributes on expressions are experimental + //~| NOTE: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> + || { + //~^ First Pass analysis includes: + //~| Min Capture analysis includes: + let p = t.0.0; + //~^ NOTE: Capturing t[(0, 0),Deref,(0, 0)] -> ByValue + //~| NOTE: Min Capture t[(0, 0)] -> ByValue + println!("{} {:?}", t.1, p); + //~^ NOTE: Capturing t[(1, 0)] -> ImmBorrow + //~| NOTE: Min Capture t[(1, 0)] -> ImmBorrow + }; + + c(); +} + +fn main() { + big_box(); +} |