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diff --git a/libstdc++-v3/testsuite/tr1/4_metaprogramming/primary_type_categories/is_function/is_function.cc b/libstdc++-v3/testsuite/tr1/4_metaprogramming/primary_type_categories/is_function/is_function.cc
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+++ b/libstdc++-v3/testsuite/tr1/4_metaprogramming/primary_type_categories/is_function/is_function.cc
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+// 2004-12-16  Paolo Carlini  <pcarlini@suse.de>
+//
+// Copyright (C) 2004, 2005 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 2, 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 COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 4.5.1 Primary type categories
+
+#include <tr1/type_traits>
+#include <testsuite_hooks.h>
+#include <testsuite_tr1.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using std::tr1::is_function;
+  using namespace __gnu_test;
+
+  // Positive tests.
+  VERIFY( (test_category<is_function, int (int)>(true)) );
+  VERIFY( (test_category<is_function, ClassType (ClassType)>(true)) );
+  VERIFY( (test_category<is_function, float (int, float, int[], int&)>(true)) );
+
+  // Negative tests.
+  VERIFY( (test_category<is_function, int&>(false)) );
+  VERIFY( (test_category<is_function, void>(false)) );
+  VERIFY( (test_category<is_function, const void>(false)) );
+
+  VERIFY( (test_category<is_function, AbstractClass>(false)) );
+  VERIFY( (test_category<is_function, int(&)(int)>(false)) );
+  
+  // Sanity check.
+  VERIFY( (test_category<is_function, ClassType>(false)) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}