e);</span>

  <span class="n">x_iterator</span><span class="o">&amp;</span>       <span class="n">Loc</span><span class="o">::</span><span class="n">x</span><span class="p">();</span>
  <span class="n">x_iterator</span> <span class="k">const</span><span class="o">&amp;</span> <span class="n">Loc</span><span class="o">::</span><span class="n">x</span><span class="p">()</span> <span class="k">const</span><span class="p">;</span>
  <span class="n">y_iterator</span><span class="o">&amp;</span>       <span class