"special">&lt;</span><span class="identifier">I</span><span class="special">,</span><span class="identifier">R</span><span class="special">&gt;,</span> <span class="identifier">R</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">random_access_iterator_tag</span><span class="special">,</span> <span class="identifier">R</span><span class="special">&gt;::</span><span class="identifier">difference_type</span> <span class="identifier">