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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/union/union-const-eval-field.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/union/union-const-eval-field.rs')
-rw-r--r-- | src/test/ui/union/union-const-eval-field.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/union/union-const-eval-field.rs b/src/test/ui/union/union-const-eval-field.rs new file mode 100644 index 000000000..ca48785cd --- /dev/null +++ b/src/test/ui/union/union-const-eval-field.rs @@ -0,0 +1,45 @@ +// run-pass +// revisions: mirunsafeck thirunsafeck +// [thirunsafeck]compile-flags: -Z thir-unsafeck + +type Field1 = (i32, u32); +type Field2 = f32; +type Field3 = i64; + +union DummyUnion { + field1: Field1, + field2: Field2, + field3: Field3, +} + +const FLOAT1_AS_I32: i32 = 1065353216; +const UNION: DummyUnion = DummyUnion { field1: (FLOAT1_AS_I32, 0) }; + +const fn read_field1() -> Field1 { + const FIELD1: Field1 = unsafe { UNION.field1 }; + FIELD1 +} + +const fn read_field2() -> Field2 { + const FIELD2: Field2 = unsafe { UNION.field2 }; + FIELD2 +} + +const fn read_field3() -> Field3 { + const FIELD3: Field3 = unsafe { UNION.field3 }; + FIELD3 +} + +fn main() { + let foo = FLOAT1_AS_I32; + assert_eq!(read_field1().0, foo); + assert_eq!(read_field1().0, FLOAT1_AS_I32); + + let foo = 1.0; + assert_eq!(read_field2(), foo); + assert_eq!(read_field2(), 1.0); + + assert_eq!(read_field3(), unsafe { UNION.field3 }); + let foo = unsafe { UNION.field3 }; + assert_eq!(read_field3(), foo); +} |