n class="identifier">Base</span></code>
          type must be Default Constructible.<br> <span class="bold"><strong>Returns:</strong></span>
          An instance of <code class="computeroutput"><span class="identifier">iterator_adaptor</span></code>
          with <code class="computeroutput"><span class="identifier">m_iterator</span></code> default
          constructed.
        </p>
<pre class="programlisting"><span class="keyword">explicit</span> <span class="identifier">iterator_adaptor</span><span cl