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diff --git a/libstdc++-v3/testsuite/26_numerics/complex/dr781.cc b/libstdc++-v3/testsuite/26_numerics/complex/dr781.cc
new file mode 100644
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+++ b/libstdc++-v3/testsuite/26_numerics/complex/dr781.cc
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+// { dg-options "-std=gnu++0x" }
+// 2008-05-22  Paolo Carlini  <paolo.carlini@oracle.com>
+//
+// Copyright (C) 2008, 2009 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 <complex>
+#include <testsuite_hooks.h>
+#include <testsuite_tr1.h>
+
+// DR 781. std::complex should add missing C99 functions.
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using __gnu_test::check_ret_type;
+
+  typedef std::complex<float>       cmplx_f_type;
+  typedef std::complex<double>      cmplx_d_type;
+  typedef std::complex<long double> cmplx_ld_type;
+
+  const int          i1 = 1;
+  const float        f1 = 1.0f;
+  const double       d1 = 1.0;
+  const long double ld1 = 1.0l;
+
+  const cmplx_f_type  c_f1(f1, f1);
+  const cmplx_d_type  c_d1(d1, d1);
+  const cmplx_ld_type c_ld1(ld1, ld1);
+
+  check_ret_type<cmplx_f_type>(std::proj(c_f1));
+  check_ret_type<cmplx_d_type>(std::proj(c_d1));
+  check_ret_type<cmplx_ld_type>(std::proj(c_ld1));
+
+  check_ret_type<cmplx_f_type>(std::proj(f1));
+  check_ret_type<cmplx_d_type>(std::proj(d1));
+  check_ret_type<cmplx_d_type>(std::proj(i1));
+  VERIFY( std::proj(i1) == std::proj(double(i1)) );
+  VERIFY( std::proj(i1) == std::proj(cmplx_d_type(double(i1))) );
+  check_ret_type<cmplx_ld_type>(std::proj(ld1));
+}
+
+int main()
+{
+  test01();
+  return 0;
+}