You can now manually disable move semantics.

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

doc/91_relnotes.qbk

@@ -16,6 +16,7 @@
 * `boost::none_t` is no longer convertible from literal `0`. This avoids a bug where `optional<rational<int>> oi = 0;` would initialize an optional object with no contained value.
 * Improved the trick that prevents streaming out `optional` without header `optional_io.hpp` by using safe-bool idiom. This addresses [@https://svn.boost.org/trac/boost/ticket/10825 Trac #10825]
 * IOStream operators are now mentioned in documentation.
+* Added a way to manually disable move semantics: just define macro `BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES`. This can be used to work around [@https://svn.boost.org/trac/boost/ticket/10399 Trac #10399]
 
 
 [heading Boost Release 1.57]

doc/html/boost_optional/relnotes.html

@@ -47,6 +47,11 @@
 <li class="listitem">
           IOStream operators are now mentioned in documentation.
         </li>
+<li class="listitem">
+          Added a way to manually disable move semantics: just define macro <code class="computeroutput"><span class="identifier">BOOST_OPTIONAL_CONFIG_NO_RVALUE_REFERENCES</span></code>.
+          This can be used to work around <a href="https://svn.boost.org/trac/boost/ticket/10399" target="_top">Trac
+          #10399</a>
+        </li>
 </ul></div>
 <h4>
 <a name="boost_optional.relnotes.h1"></a>

doc/html/index.html

@@ -138,7 +138,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: January 20, 2015 at 23:06:39 GMT</small></p></td>
+<td align="left"><p><small>Last revised: January 21, 2015 at 13:59:23 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>