lass="keyword">typename</span> Type<span class="special">,</span> <span class="keyword">bool</span> is_total<span class="special">,</span> <span class="keyword">bool</span> absorbs_identities<span class="special">&gt;</span> 
  <span class="keyword">struct</span> <a class="link" href="map/on_total_absorbable.html" title="Struct template on_total_absorbable">on_total_absorbable</a> <span class="special">{</span>
  <span class="special">}</span><span class="special">;</span>
  <span class="keyword">template</