libstdc++-v3/testsuite/29_atomics/atomic_float/value_init.cc

   1 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++20 } }
  19 // { dg-require-thread-fence "" }
  20 // { dg-add-options libatomic }
  21
  22 #include <atomic>
  23 #include <testsuite_hooks.h>
  24
  25 constexpr std::atomic<float> a;
  26
  27 void
  28 test01()
  29 {
  30   VERIFY(a.load() == 0);
  31   static_assert(std::is_nothrow_default_constructible_v<std::atomic<float>>);
  32 }
  33
  34 int
  35 main()
  36 {
  37   test01();
  38 }