libstdc++-v3/testsuite/20_util/bitset/operations/constexpr-2.cc

   1 // { dg-do compile { target c++11 } }
   2 // { dg-require-normal-mode "" }
   3
   4 // Copyright (C) 2011-2024 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 <bitset>
  22
  23 int main()
  24 {
  25   // bitset base type
  26   typedef std::_Base_bitset<6> bitset_base;
  27   constexpr bitset_base base = bitset_base();
  28
  29   constexpr auto r1 __attribute__((unused)) = base._M_getword(2);
  30   // constexpr auto r2 = base._M_getdata(); // error, pointer to this
  31   auto r2 __attribute__((unused)) = base._M_getdata();
  32   constexpr auto r3 __attribute__((unused)) = base._M_hiword();
  33
  34   return 0;
  35 }