span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Type<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="unit_element_b_idp40217488.html" title="Struct template unit_element_based_inplace_combine">unit_element_based_inplace_combine</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">Type</span> <span class="special">&amp;</s