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// { dg-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
// { dg-require-thread-fence "" }
// Copyright (C) 2008-2023 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/>.
#include <atomic>
#include <testsuite_hooks.h>
int main()
{
using namespace std;
atomic_flag af0 = ATOMIC_FLAG_INIT;
VERIFY( ! af0.test(memory_order_acquire) );
atomic_flag af{true};
const atomic_flag& caf = af;
VERIFY( af.test() );
VERIFY( caf.test() );
af.clear();
VERIFY( ! af.test() );
VERIFY( ! caf.test() );
}
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