i>Built-in support for deep-copy semantics via the <a class="reference" href="reference.html#the-clonable-concept">the Clonable concept</a></li>
</ol>
<p>The disadvantages are</p>
<ol class="arabic simple">
<li>Less flexible than containers of smart pointers like <a class="reference" href="../../smart_ptr/shared_ptr.htm">boost::shared_ptr</a></li>
</ol>
<p>When you do need shared semantics, this library is not what you need.</p>
</div>
<div class="section">
<h1><a id="upgrading-from-boost-v-1-33" name="upgr