/span><span class="p">);</span>

  <span class="c1">// Storing relative location for faster repeated access and accessing it</span>
  <span class="n">cached_location_t</span> <span class="n">Loc</span><span class="o">::</span><span class="n">cache_location</span><span class="p">(</span><span class="k">const</span> <span class="n">difference_type</span><span class="o">&amp;</span><span class="p">)</span> <span class="k">const</span><span class="p">;</span>
  <span class="n">reference</span> <span class="k">o