1 files changed, 79 insertions, 0 deletions
diff --git a/bindgen-tests/tests/expectations/tests/union-align.rs b/bindgen-tests/tests/expectations/tests/union-align.rs
new file mode 100644
index 00000000..062ea97a
--- /dev/null
+++ b/bindgen-tests/tests/expectations/tests/union-align.rs
@@ -0,0 +1,79 @@
+#![allow(
+    dead_code,
+    non_snake_case,
+    non_camel_case_types,
+    non_upper_case_globals
+)]
+
+#[repr(C)]
+#[repr(align(16))]
+#[derive(Copy, Clone)]
+pub union Bar {
+    pub foo: ::std::os::raw::c_uchar,
+}
+#[test]
+fn bindgen_test_layout_Bar() {
+    const UNINIT: ::std::mem::MaybeUninit<Bar> =
+        ::std::mem::MaybeUninit::uninit();
+    let ptr = UNINIT.as_ptr();
+    assert_eq!(
+        ::std::mem::size_of::<Bar>(),
+        16usize,
+        concat!("Size of: ", stringify!(Bar))
+    );
+    assert_eq!(
+        ::std::mem::align_of::<Bar>(),
+        16usize,
+        concat!("Alignment of ", stringify!(Bar))
+    );
+    assert_eq!(
+        unsafe { ::std::ptr::addr_of!((*ptr).foo) as usize - ptr as usize },
+        0usize,
+        concat!("Offset of field: ", stringify!(Bar), "::", stringify!(foo))
+    );
+}
+impl Default for Bar {
+    fn default() -> Self {
+        unsafe {
+            let mut s: Self = ::std::mem::uninitialized();
+            ::std::ptr::write_bytes(&mut s, 0, 1);
+            s
+        }
+    }
+}
+#[repr(C)]
+#[repr(align(16))]
+#[derive(Copy, Clone)]
+pub union Baz {
+    pub bar: Bar,
+}
+#[test]
+fn bindgen_test_layout_Baz() {
+    const UNINIT: ::std::mem::MaybeUninit<Baz> =
+        ::std::mem::MaybeUninit::uninit();
+    let ptr = UNINIT.as_ptr();
+    assert_eq!(
+        ::std::mem::size_of::<Baz>(),
+        16usize,
+        concat!("Size of: ", stringify!(Baz))
+    );
+    assert_eq!(
+        ::std::mem::align_of::<Baz>(),
+        16usize,
+        concat!("Alignment of ", stringify!(Baz))
+    );
+    assert_eq!(
+        unsafe { ::std::ptr::addr_of!((*ptr).bar) as usize - ptr as usize },
+        0usize,
+        concat!("Offset of field: ", stringify!(Baz), "::", stringify!(bar))
+    );
+}
+impl Default for Baz {
+    fn default() -> Self {
+        unsafe {
+            let mut s: Self = ::std::mem::uninitialized();
+            ::std::ptr::write_bytes(&mut s, 0, 1);
+            s
+        }
+    }
+}