><span class="o">=</span><span class="n">ik</span><span class="p">)</span> <span class="kd">::</span> <span class="n">idm</span>
  <span class="n">idm</span> <span class="o">=</span> <span class="n">size</span><span class="p">(</span><span class="n">x</span><span class="p">)</span>
  <span class="k">allocate</span><span class="p">(</span><span class="n">dx</span><span class="p">(</span><span class="n">idm</span><span class="p">))</span>
  <span class="k">if</span><span class="p">(</span><span class="n">idm<