n
    <a href="../../../mpl/doc/refmanual/lambda-expression.html"><code>MPL Lambda
    Expression</code></a> such that invoking it with type <code>C</code> resolves to
    a holder of <code>C</code>.
  </li>
</ol>
</p>

<h2><a name="holder_tag_synopsis">Header
<a href="../../../../boost/flyweight/holder_tag.hpp"><code>"boost/flyweight/holder_tag.hpp"</code></a> synopsis</a></h2>

<blockquote><pre>
<span class=keyword>namespace</span> <span class=identifier>boost</span><span class=special>{</span>

<span cla