Added swap tests for std types, as discussed at "Re: [boost] [swap] Workaround for ADL failures of MSVC 7.1 and Borland okay?", http://lists.boost.org/Archives/boost/2008/08/140589.php

[SVN r47943]

swap/test/std_bitset.cpp

@@ -0,0 +1,33 @@
+// Copyright (c) 2008 Joseph Gauterin, Niels Dekker
+//
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// Tests swapping std::bitset<T> objects by means of boost::swap.
+// Unlike most other Standard C++ Library template classes,
+// std::bitset<T> does not have its own std::swap overload.
+
+#include <boost/utility/swap.hpp>
+#define BOOST_INCLUDE_MAIN
+#include <boost/test/test_tools.hpp>
+
+#include <bitset>
+
+int test_main(int, char*[])
+{
+  typedef std::bitset<8> bitset_type;
+  const bitset_type initial_value1 = 1ul;
+  const bitset_type initial_value2 = 2ul;
+	
+  bitset_type object1 = initial_value1;
+  bitset_type object2 = initial_value2;
+
+  boost::swap(object1,object2);
+
+  BOOST_CHECK_EQUAL(object1,initial_value2);
+  BOOST_CHECK_EQUAL(object2,initial_value1);
+
+  return 0;
+}
+