ename</span> T<span class="special">&gt;</span> 
  <span class="keyword">typename</span> <a class="link" href="result_of/as_child.html" title="Struct template as_child">proto::result_of::as_child</a><span class="special">&lt;</span> <span class="identifier">T</span> <span class="keyword">const</span><span class="special">,</span> <span class="identifier">Domain</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> 
  <span class="identifier">as_child</sp