mirror of https://github.com/rust-lang/rust
39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
//@ edition:2021
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// Test that we handle derferences properly when only some of the captures are being moved with
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// `capture_disjoint_fields` enabled.
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#![feature(rustc_attrs)]
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#[derive(Debug, Default)]
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struct SomeLargeType;
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struct MuchLargerType([SomeLargeType; 32]);
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// Ensure that we don't capture any derefs when moving captures into the closures,
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// i.e. only data from the enclosing stack is moved.
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fn big_box() {
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let s = MuchLargerType(Default::default());
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let b = Box::new(s);
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let t = (b, 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//~| NOTE: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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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//~^ First Pass analysis includes:
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//~| Min Capture analysis includes:
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let p = t.0.0;
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//~^ NOTE: Capturing t[(0, 0),Deref,(0, 0)] -> ByValue
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//~| NOTE: Min Capture t[(0, 0)] -> ByValue
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println!("{} {:?}", t.1, p);
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//~^ NOTE: Capturing t[(1, 0)] -> ImmBorrow
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//~| NOTE: Min Capture t[(1, 0)] -> ImmBorrow
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};
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c();
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}
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fn main() {
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big_box();
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}
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