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// Copyright (C) 2020-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do run { target c++20 } }
// { dg-require-atomic-cmpxchg-word "" }
#include <atomic>
#include <testsuite_hooks.h>
void
test01()
{
std::atomic_flag f;
VERIFY(!f.test_and_set());
VERIFY(f.test_and_set());
static_assert(std::is_nothrow_default_constructible_v<std::atomic_flag>);
}
int
main()
{
test01();
}
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