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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/union/union-drop.rs
parentInitial commit. (diff)
downloadrustc-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/union/union-drop.rs')
-rw-r--r--src/test/ui/union/union-drop.rs60
1 files changed, 60 insertions, 0 deletions
diff --git a/src/test/ui/union/union-drop.rs b/src/test/ui/union/union-drop.rs
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index 000000000..c3d7d41ca
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+++ b/src/test/ui/union/union-drop.rs
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+// run-pass
+// revisions: mirunsafeck thirunsafeck
+// [thirunsafeck]compile-flags: -Z thir-unsafeck
+
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+// Drop works for union itself.
+
+#[derive(Copy, Clone)]
+struct S;
+
+union U {
+ a: u8
+}
+
+union W {
+ a: S,
+}
+
+union Y {
+ a: S,
+}
+
+impl Drop for U {
+ fn drop(&mut self) {
+ unsafe { CHECK += 1; }
+ }
+}
+
+impl Drop for W {
+ fn drop(&mut self) {
+ unsafe { CHECK += 1; }
+ }
+}
+
+static mut CHECK: u8 = 0;
+
+fn main() {
+ unsafe {
+ assert_eq!(CHECK, 0);
+ {
+ let u = U { a: 1 };
+ }
+ assert_eq!(CHECK, 1); // 1, dtor of U is called
+ {
+ let w = W { a: S };
+ }
+ assert_eq!(CHECK, 2); // 2, dtor of W is called
+ {
+ let y = Y { a: S };
+ }
+ assert_eq!(CHECK, 2); // 2, Y has no dtor
+ {
+ let u2 = U { a: 1 };
+ std::mem::forget(u2);
+ }
+ assert_eq!(CHECK, 2); // 2, dtor of U *not* called for u2
+ }
+}