libstdc++-v3/testsuite/20_util/aligned_storage/value.cc

   1 // { dg-do compile { target c++11 } }
   2 // 2007-09-17  Paolo Carlini  <pcarlini@suse.de>
   3 //
   4 // Copyright (C) 2007-2021 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11 //
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <type_traits>
  22 #include <testsuite_tr1.h>
  23
  24 struct MSAlignType { } __attribute__((__aligned__));
  25
  26 void test01()
  27 {
  28   using std::aligned_storage;
  29   using std::alignment_of;
  30   using namespace __gnu_test;
  31
  32   const std::size_t align_c = alignment_of<char>::value;
  33   static_assert(sizeof(aligned_storage<4, align_c>::type) >= 4, "");
  34   static_assert(__alignof__(aligned_storage<4, align_c>::type) == align_c, "");
  35
  36   const std::size_t align_s = alignment_of<short>::value;
  37   static_assert(sizeof(aligned_storage<1, align_s>::type) >= 1, "");
  38   static_assert(__alignof__(aligned_storage<1, align_s>::type) == align_s, "");
  39
  40   const std::size_t align_i = alignment_of<int>::value;
  41   static_assert(sizeof(aligned_storage<7, align_i>::type) >= 7, "");
  42   static_assert(__alignof__(aligned_storage<7, align_i>::type) == align_i, "");
  43
  44   const std::size_t align_d = alignment_of<double>::value;
  45   static_assert(sizeof(aligned_storage<2, align_d>::type) >= 2, "");
  46   static_assert(__alignof__(aligned_storage<2, align_d>::type) == align_d, "");
  47
  48   const std::size_t align_ai = alignment_of<int[4]>::value;
  49   static_assert(sizeof(aligned_storage<20, align_ai>::type) >= 20, "");
  50   static_assert(__alignof__(aligned_storage<20, align_ai>::type) == align_ai,
  51                 "");
  52
  53   const std::size_t align_ct = alignment_of<ClassType>::value;
  54   static_assert(sizeof(aligned_storage<11, align_ct>::type) >= 11, "");
  55   static_assert(__alignof__(aligned_storage<11, align_ct>::type) == align_ct,
  56                 "");
  57
  58   const std::size_t align_msa = alignment_of<MSAlignType>::value;
  59   static_assert(sizeof(aligned_storage<5>::type) >= 5, "");
  60   static_assert(__alignof__(aligned_storage<5>::type) == align_msa, "");
  61 }