1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // type_traits
11
12 // union
13
14 #include <type_traits>
15
16 template <class T>
test_union_imp()17 void test_union_imp()
18 {
19 static_assert(!std::is_void<T>::value, "");
20 #if _LIBCPP_STD_VER > 11
21 static_assert(!std::is_null_pointer<T>::value, "");
22 #endif
23 static_assert(!std::is_integral<T>::value, "");
24 static_assert(!std::is_floating_point<T>::value, "");
25 static_assert(!std::is_array<T>::value, "");
26 static_assert(!std::is_pointer<T>::value, "");
27 static_assert(!std::is_lvalue_reference<T>::value, "");
28 static_assert(!std::is_rvalue_reference<T>::value, "");
29 static_assert(!std::is_member_object_pointer<T>::value, "");
30 static_assert(!std::is_member_function_pointer<T>::value, "");
31 static_assert(!std::is_enum<T>::value, "");
32 static_assert( std::is_union<T>::value, "");
33 static_assert(!std::is_class<T>::value, "");
34 static_assert(!std::is_function<T>::value, "");
35 }
36
37 template <class T>
test_union()38 void test_union()
39 {
40 test_union_imp<T>();
41 test_union_imp<const T>();
42 test_union_imp<volatile T>();
43 test_union_imp<const volatile T>();
44 }
45
46 union Union
47 {
48 int _;
49 double __;
50 };
51
main()52 int main()
53 {
54 test_union<Union>();
55 }
56