  some operations are not available in this case:
    </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
        Converting constructors
      </li>
<li class="listitem">
        Converting assignment
      </li>
<li class="listitem">
        InPlace construction
      </li>
<li class="listitem">
        InPlace assignment
      </li>
<li class="listitem">
        Value-access via pointer
      </li>
</ul></div>
<p>
      Also, even though <code class="computeroutput"