Try fix for nameless union/struct error

Author: mcbarton

unittests/CppInterOp/VariableReflectionTest.cpp

@@ -59,25 +59,25 @@ TEST(VariableReflectionTest, GetDatamembers) {
   struct Klass1 {                                                              \
     Klass1(int i) : num(1), b(i) {}                                            \
     int num;                                                                   \
-    union {                                                                    \
+    union foo {                                                                \
       double a;                                                                \
       int b;                                                                   \
     };                                                                         \
   } const k1(5);                                                               \
   struct Klass2 {                                                              \
     Klass2(double d) : num(2), a(d) {}                                         \
     int num;                                                                   \
-    struct {                                                                   \
+    struct foo {                                                               \
       double a;                                                                \
       int b;                                                                   \
     };                                                                         \
   } const k2(2.5);                                                             \
   struct Klass3 {                                                              \
     Klass3(int i) : num(i) {}                                                  \
     int num;                                                                   \
-    struct {                                                                   \
+    struct foo {                                                               \
       double a;                                                                \
-      union {                                                                  \
+      union bar {                                                              \
         float b;                                                               \
         int c;                                                                 \
       };                                                                       \