1// { dg-options " -std=gnu++11 " }
2// { dg-do compile }
3
4// 2014-04-16 R��diger Sonderfeld  <ruediger@c-plusplus.de>
5
6// Copyright (C) 2014-2015 Free Software Foundation, Inc.
7//
8// This file is part of the GNU ISO C++ Library.  This library is free
9// software; you can redistribute it and/or modify it under the terms
10// of the GNU General Public License as published by the Free Software
11// Foundation; either version 3, or (at your option) any later
12// version.
13
14// This library is distributed in the hope that it will be useful, but
15// WITHOUT ANY WARRANTY; without even the implied warranty of
16// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17// General Public License for more details.
18
19// You should have received a copy of the GNU General Public License
20// along with this library; see the file COPYING3.  If not see
21// <http://www.gnu.org/licenses/>.
22
23// C++11 [meta.trans.other] 20.9.7.6: aligned_union
24
25#include <type_traits>
26#include <testsuite_tr1.h>
27
28struct MSAlignType { } __attribute__((__aligned__));
29
30template<typename...T>
31  struct mymax
32  {
33    static const std::size_t alignment = 0;
34    static const std::size_t size = 0;
35  };
36
37template<typename L,  typename...T>
38  struct mymax<L, T...>
39  {
40    static const std::size_t alignment = alignof(L) > mymax<T...>::alignment
41      ? alignof(L) : mymax<T...>::alignment;
42    static const std::size_t size = sizeof(L) > mymax<T...>::size
43      ? sizeof(L) : mymax<T...>::size;
44  };
45
46void test01()
47{
48  using std::aligned_union;
49  using std::alignment_of;
50  using std::size_t;
51  using namespace __gnu_test;
52
53  const size_t max_a = mymax<char, short, int, double, int[4],
54                             ClassType, MSAlignType>::alignment;
55  const size_t max_s = mymax<char, short, int, double, int[4],
56                             ClassType, MSAlignType>::size;
57
58  typedef aligned_union<0, char, short, int, double, int[4],
59                        ClassType, MSAlignType> au_type;
60  static_assert(au_type::alignment_value == max_a, "Alignment value");
61  static_assert(sizeof(au_type::type) >= max_s, "Storage size");
62
63  typedef aligned_union<max_s+100, char, short, int, double, int[4],
64                        ClassType, MSAlignType> au_type2;
65  static_assert(sizeof(au_type2::type) >= max_s+100,
66                "Storage size (at least len)");
67}
68
69int main()
70{
71  test01();
72}
73