From 084911d9b376fa9bea2567f53854511adc6d07ec Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Mon, 4 Dec 2017 02:04:08 -0500
Subject: [PATCH] add test for @sizeOf on extern and packed unions

---
 test/cases/union.zig | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/test/cases/union.zig b/test/cases/union.zig
index 291384eaeb..fb0ca1238d 100644
--- a/test/cases/union.zig
+++ b/test/cases/union.zig
@@ -150,3 +150,19 @@ fn testEnumWithSpecifiedAndUnspecifiedTagValues(x: &const MultipleChoice2) {
     });
 }
 
+
+const ExternPtrOrInt = extern union {
+    ptr: &u8,
+    int: u64
+};
+test "extern union size" {
+    comptime assert(@sizeOf(ExternPtrOrInt) == 8);
+}
+
+const PackedPtrOrInt = packed union {
+    ptr: &u8,
+    int: u64
+};
+test "extern union size" {
+    comptime assert(@sizeOf(PackedPtrOrInt) == 8);
+}