union.pass.cpp revision bc8d3f97eb5c958007f2713238472e0c1c8fe02c 
1//===----------------------------------------------------------------------===//
2//
3// ��������������������The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// type_traits
11
12// union
13
14#include <type_traits>
15
16template <class T>
17void test_union_imp()
18{
19    static_assert(!std::is_void<T>::value, "");
20    static_assert(!std::is_integral<T>::value, "");
21    static_assert(!std::is_floating_point<T>::value, "");
22    static_assert(!std::is_array<T>::value, "");
23    static_assert(!std::is_pointer<T>::value, "");
24    static_assert(!std::is_lvalue_reference<T>::value, "");
25    static_assert(!std::is_rvalue_reference<T>::value, "");
26    static_assert(!std::is_member_object_pointer<T>::value, "");
27    static_assert(!std::is_member_function_pointer<T>::value, "");
28    static_assert(!std::is_enum<T>::value, "");
29    static_assert( std::is_union<T>::value, "");
30    static_assert(!std::is_class<T>::value, "");
31    static_assert(!std::is_function<T>::value, "");
32}
33
34template <class T>
35void test_union()
36{
37    test_union_imp<T>();
38    test_union_imp<const T>();
39    test_union_imp<volatile T>();
40    test_union_imp<const volatile T>();
41}
42
43union Union
44{
45    int _;
46    double __;
47};
48
49int main()
50{
51    test_union<Union>();
52}
53