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diff --git a/libstdc++-v3/testsuite/23_containers/bitset/to_string/1.cc b/libstdc++-v3/testsuite/23_containers/bitset/to_string/1.cc
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+++ b/libstdc++-v3/testsuite/23_containers/bitset/to_string/1.cc
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+// 2004-11-17  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 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/>.
+
+// 23.3.5.2 bitset members
+
+#include <bitset>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  bitset<5> b5;
+  string s0 = b5.to_string<char, char_traits<char>, allocator<char> >();
+  VERIFY( s0 == "00000" );
+
+  // DR 434. bitset::to_string() hard to use.
+  b5.set(0);
+  string s1 = b5.to_string<char, char_traits<char> >();
+  VERIFY( s1 == "00001" );
+
+  b5.set(2);
+  string s2 = b5.to_string<char>();
+  VERIFY( s2 == "00101" );
+
+  b5.set(4);
+  string s3 = b5.to_string();
+  VERIFY( s3 == "10101" );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}