heckpoint</span></a><span class="special">(</span><span class="identifier">const_string</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">,</span> 
                      <span class="identifier">const_string</span> <span class="special">=</span> <span class="identifier">const_string</span><span class="special">(</span><span class="special">)</span><span class="special">)</span><span class="specia