       provides the following operations.
      </p>
<pre class="programlisting"><span class="identifier">filter_iterator</span><span class="special">();</span>
</pre>
<p>
        <span class="bold"><strong>Requires: </strong></span><code class="computeroutput"><span class="identifier">Predicate</span></code>
        and <code class="computeroutput"><span class="identifier">Iterator</span></code> must be Default
        Constructible.<br> <span class="bold"><strong>Effects: </strong></span> Constructs
     