/type_erasure/placeholder_of.hpp&gt;">boost/type_erasure/placeholder_of.hpp</a>&gt;

</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> T<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="placeholder_of.html" title="Struct template placeholder_of">placeholder_of</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="emphasis"><em><s