1 files changed, 27 insertions, 0 deletions
diff --git a/tests/rust/union.rs b/tests/rust/union.rs
new file mode 100644
index 0000000..b76f98a
--- /dev/null
+++ b/tests/rust/union.rs
@@ -0,0 +1,27 @@
+use std::marker::PhantomData;
+
+union Opaque {
+    x: i32,
+    y: f32,
+}
+
+#[repr(C)]
+union Normal {
+    x: i32,
+    y: f32,
+}
+
+#[repr(C)]
+union NormalWithZST {
+    x: i32,
+    y: f32,
+    z: (),
+    w: PhantomData<i32>,
+}
+
+#[no_mangle]
+pub extern "C" fn root(
+    a: *mut Opaque,
+    b: Normal,
+    c: NormalWithZST
+) { }