de class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">istream_iterator</span></code>,
        which is an input iterator). <code class="computeroutput"><span class="identifier">basic_istream_iterator</span></code>
        is derived from a multi_pass with the following policies: <code class="computeroutput"><span class="identifier">istream</span></code>
        InputPolicy, <code class="computeroutput"><span class="identifier">ref_counted</span>