aligned_union.pass.cpp revision 5544f7e0c7c89c82acf8cf1f9681e737f3955755 
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// aligned_union<size_t Len, class ...Types>
13
14#include <type_traits>
15
16int main()
17{
18#ifndef _LIBCPP_HAS_NO_VARIADICS
19    {
20    typedef std::aligned_union<10, char >::type T1;
21    static_assert(std::alignment_of<T1>::value == 1, "");
22    static_assert(sizeof(T1) == 10, "");
23    }
24    {
25    typedef std::aligned_union<10, short >::type T1;
26    static_assert(std::alignment_of<T1>::value == 2, "");
27    static_assert(sizeof(T1) == 10, "");
28    }
29    {
30    typedef std::aligned_union<10, int >::type T1;
31    static_assert(std::alignment_of<T1>::value == 4, "");
32    static_assert(sizeof(T1) == 12, "");
33    }
34    {
35    typedef std::aligned_union<10, double >::type T1;
36    static_assert(std::alignment_of<T1>::value == 8, "");
37    static_assert(sizeof(T1) == 16, "");
38    }
39    {
40    typedef std::aligned_union<10, short, char >::type T1;
41    static_assert(std::alignment_of<T1>::value == 2, "");
42    static_assert(sizeof(T1) == 10, "");
43    }
44    {
45    typedef std::aligned_union<10, char, short >::type T1;
46    static_assert(std::alignment_of<T1>::value == 2, "");
47    static_assert(sizeof(T1) == 10, "");
48    }
49    {
50    typedef std::aligned_union<2, int, char, short >::type T1;
51    static_assert(std::alignment_of<T1>::value == 4, "");
52    static_assert(sizeof(T1) == 4, "");
53    }
54    {
55    typedef std::aligned_union<2, char, int, short >::type T1;
56    static_assert(std::alignment_of<T1>::value == 4, "");
57    static_assert(sizeof(T1) == 4, "");
58    }
59    {
60    typedef std::aligned_union<2, char, short, int >::type T1;
61    static_assert(std::alignment_of<T1>::value == 4, "");
62    static_assert(sizeof(T1) == 4, "");
63    }
64#endif
65}
66