fier">enable_if_c</span><span class="special">&lt;</span> <span class="identifier">is_same</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">iterator_traits</span><span class="special">&lt;</span> <span class="identifier">RandomAccessIter</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">value_type</span><span class="special">,</span> <span clas