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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/unsafe/union_destructure.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/unsafe/union_destructure.rs')
-rw-r--r--src/test/ui/unsafe/union_destructure.rs51
1 files changed, 51 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/union_destructure.rs b/src/test/ui/unsafe/union_destructure.rs
new file mode 100644
index 000000000..6c88344b5
--- /dev/null
+++ b/src/test/ui/unsafe/union_destructure.rs
@@ -0,0 +1,51 @@
+// run-pass
+// revisions: mir thir
+// [thir]compile-flags: -Z thir-unsafeck
+
+#[derive(Copy, Clone)]
+#[allow(dead_code)]
+struct Pie {
+ slices: u8,
+ size: u8,
+}
+
+union Foo {
+ #[allow(dead_code)]
+ bar: i8,
+ baz: Pie
+}
+
+fn main() {
+ let u = Foo { bar: 5 };
+ let (Some(Foo { bar: _ }) | None) = Some(u);
+ let u = Foo { bar: 6 };
+ let (Some(Foo { bar: _ }) | Some(Foo { bar: _ }) | None) = Some(u);
+ unsafe {
+ let u = Foo { bar: 7 };
+ let (Foo { bar } | Foo { bar }) = u;
+ assert_eq!(bar, 7)
+ }
+ let u = Foo { bar: 8 };
+ match Some(u) {
+ Some(Foo { bar: _ }) => 3,
+ None => 4,
+ };
+
+ let u = Foo { bar: 9 };
+ unsafe { //[mir]~ WARNING unnecessary `unsafe` block
+ match u {
+ Foo { baz: Pie { .. } } => {},
+ };
+ }
+ let u = Foo { bar: 10 };
+ unsafe { //[mir]~ WARNING unnecessary `unsafe` block
+ match u {
+ Foo { baz: Pie { slices: _, size: _ } } => {},
+ };
+ }
+
+ let u = Foo { bar: 11 };
+ match u {
+ Foo { baz: _ } => {},
+ };
+}