type</span> <span class="o">==</span> <span class="n">value_type</span><span class="p">;</span>
  <span class="p">};</span>

  <span class="c1">// Defines the type of a locator similar to this type, except it invokes Deref upon dereferencing</span>
  <span class="k">template</span> <span class="o">&lt;</span><span class="n">PixelDereferenceAdaptorConcept</span> <span class="n">Deref</span><span class="o">&gt;</span> <span class="k">struct</span> <span class="n">add_deref</span> <span class="p">{</span>
    