--- /dev/null
+// 2009-09-23 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 <bitset>
+#include <testsuite_hooks.h>
+
+// DR 396. what are characters zero and one.
+void test01()
+{
+ bool test __attribute__((unused)) = true;
+
+ std::bitset<4> z1(std::string("bbab"), 0, std::string::npos, 'a', 'b');
+ VERIFY( z1.to_string('a', 'b') == "bbab" );
+
+ std::bitset<4> z2(std::string("11a1"), 0, std::string::npos, 'a');
+ VERIFY( z2.to_string('a') == "11a1" );
+
+ std::bitset<8> z3(std::string("babb"), 0, std::string::npos, 'a', 'b');
+ VERIFY( z3.to_string('a', 'b') == "aaaababb" );
+
+ std::bitset<8> z4(std::string("1a11"), 0, std::string::npos, 'a');
+ VERIFY( z4.to_string('a') == "aaaa1a11" );
+
+ std::bitset<2> z5(std::string("bbab"), 0, std::string::npos, 'a', 'b');
+ VERIFY( z5.to_string('a', 'b') == "bb" );
+
+ std::bitset<2> z6(std::string("11a1"), 0, std::string::npos, 'a');
+ VERIFY( z6.to_string('a') == "11" );
+}
+
+int main()
+{
+ test01();
+ return 0;
+}