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// { dg-do compile }
// { dg-options "-std=c++98" }
// Copyright (C) 2013-2022 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/>.
// libstdc++/56111
// In C++03, we try to keep the macro "complex" as long as it does not
// conflict (std::complex).
#include <bits/c++config.h>
#if _GLIBCXX_HAVE_COMPLEX_H
# include <complex.h>
#endif
int main()
{
#if _GLIBCXX_HAVE_COMPLEX_H
double complex x = .5;
double complex y = cacos (x);
(void)y;
#endif
}
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