class="n">D</span><span class="o">&gt;::</span><span class="n">iterator</span> <span class="k">const</span><span class="o">&amp;</span> <span class="n">Loc</span><span class="o">::</span><span class="n">axis_iterator</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
  <span class="k">template</span> <span class="o">&lt;</span><span class="kt">size_t</span> <span class="n">D</span><span class="o">&gt;</span> <span class="n">axis</span><span class="o">&lt;</span><span class=