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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/destructuring-assignment/drop-order.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/destructuring-assignment/drop-order.rs')
-rw-r--r-- | src/test/ui/destructuring-assignment/drop-order.rs | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/test/ui/destructuring-assignment/drop-order.rs b/src/test/ui/destructuring-assignment/drop-order.rs new file mode 100644 index 000000000..79671054c --- /dev/null +++ b/src/test/ui/destructuring-assignment/drop-order.rs @@ -0,0 +1,43 @@ +// run-pass + +//! Test that let bindings and destructuring assignments have consistent drop orders + +#![allow(unused_variables, unused_assignments)] + +use std::cell::RefCell; + +thread_local! { + static DROP_ORDER: RefCell<Vec<usize>> = RefCell::new(Vec::new()); +} + +struct DropRecorder(usize); +impl Drop for DropRecorder { + fn drop(&mut self) { + DROP_ORDER.with(|d| d.borrow_mut().push(self.0)); + } +} + +fn main() { + let expected_drop_order = vec![1, 4, 5, 3, 2]; + // Check the drop order for let bindings: + { + let _ = DropRecorder(1); + let _val = DropRecorder(2); + let (x, _) = (DropRecorder(3), DropRecorder(4)); + drop(DropRecorder(5)); + } + DROP_ORDER.with(|d| { + assert_eq!(&*d.borrow(), &expected_drop_order); + d.borrow_mut().clear(); + }); + // Check that the drop order for destructuring assignment is the same: + { + let _val; + let x; + _ = DropRecorder(1); + _val = DropRecorder(2); + (x, _) = (DropRecorder(3), DropRecorder(4)); + drop(DropRecorder(5)); + } + DROP_ORDER.with(|d| assert_eq!(&*d.borrow(), &expected_drop_order)); +} |