ss="keyword">const</span> <span class="identifier">state_type</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">time_type</span><span class="special">,</span> 
                  <span class="keyword">const</span> <span class="identifier">state_type</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">time_type</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><sp