You can now manually disable move semantics.

This may be useful in MSVC to work around a bug described in Trac #10399

test/optional_test_msvc_bug_workaround.cpp

@@ -0,0 +1,41 @@
+// Copyright (C) 2015 Andrzej Krzemienski.
+//
+// Use, modification, and distribution is subject to 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)
+//
+// See http://www.boost.org/lib/optional for documentation.
+//
+// You are welcome to contact the author at:
+//  akrzemi1@gmail.com
+
+#define BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES
+#include "boost/optional/optional.hpp"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#include "boost/core/lightweight_test.hpp"
+
+
+struct Wrapper
+{
+  operator int () { return 9; }
+  operator boost::optional<int> () { return 7; }
+};
+
+void test()
+{
+#if (!defined BOOST_NO_CXX11_RVALUE_REFERENCES)
+  boost::optional<int> v = Wrapper();
+  BOOST_TEST(v);
+  BOOST_TEST_EQ(*v, 7);
+#endif
+} 
+
+int main()
+{
+  test();
+  return boost::report_errors();
+}