1 files changed, 93 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp b/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
index e706d7346d9..0e4add84955 100644
--- a/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
+++ b/clang/test/SemaCXX/cxx0x-nontrivial-union.cpp
@@ -10,6 +10,12 @@ struct non_trivial {
 union u {
   non_trivial nt;
 };
+union u2 {
+  non_trivial nt;
+  int k;
+  u2(int k) : k(k) {}
+  u2() : nt() {}
+};
 
 union static_data_member {
   static int i;
@@ -29,3 +35,90 @@ struct s {
 // Don't crash on this.
 struct TemplateCtor { template<typename T> TemplateCtor(T); };
 union TemplateCtorMember { TemplateCtor s; };
+
+template<typename T> struct remove_ref { typedef T type; };
+template<typename T> struct remove_ref<T&> { typedef T type; };
+template<typename T> struct remove_ref<T&&> { typedef T type; };
+template<typename T> T &&forward(typename remove_ref<T>::type &&t);
+template<typename T> T &&forward(typename remove_ref<T>::type &t);
+template<typename T> typename remove_ref<T>::type &&move(T &&t);
+
+using size_t = decltype(sizeof(int));
+void *operator new(size_t, void *p) noexcept { return p; }
+
+namespace disabled_dtor {
+  template<typename T>
+  union disable_dtor {
+    T val;
+    template<typename...U>
+    disable_dtor(U &&...u) : val(forward<U>(u)...) {}
+    ~disable_dtor() {}
+  };
+
+  struct deleted_dtor {
+    deleted_dtor(int n, char c) : n(n), c(c) {}
+    int n;
+    char c;
+    ~deleted_dtor() = delete;
+  };
+
+  disable_dtor<deleted_dtor> dd(4, 'x');
+}
+
+namespace optional {
+  template<typename T> struct optional {
+    bool has;
+    union { T value; };
+
+    optional() : has(false) {}
+    template<typename...U>
+    optional(U &&...u) : has(true), value(forward<U>(u)...) {}
+
+    optional(const optional &o) : has(o.has) {
+      if (has) new (&value) T(o.value);
+    }
+    optional(optional &&o) : has(o.has) {
+      if (has) new (&value) T(move(o.value));
+    }
+
+    optional &operator=(const optional &o) {
+      if (has) {
+        if (o.has)
+          value = o.value;
+        else
+          value.~T();
+      } else if (o.has) {
+        new (&value) T(o.value);
+      }
+      has = o.has;
+    }
+    optional &operator=(optional &&o) {
+      if (has) {
+        if (o.has)
+          value = move(o.value);
+        else
+          value.~T();
+      } else if (o.has) {
+        new (&value) T(move(o.value));
+      }
+      has = o.has;
+    }
+
+    ~optional() {
+      if (has)
+        value.~T();
+    }
+
+    explicit operator bool() const { return has; }
+    T &operator*() const { return value; }
+  };
+
+  optional<non_trivial> o1;
+  optional<non_trivial> o2{non_trivial()};
+  optional<non_trivial> o3{*o2};
+  void f() {
+    if (o2)
+      o1 = o2;
+    o2 = optional<non_trivial>();
+  }
+}