a></span><a class="link" href="multi_pass.html#spirit.support.multi_pass.inputpolicy">InputPolicy</a>
      </h5>
<p>
        An <code class="computeroutput"><span class="identifier">InputPolicy</span></code> must have
        the following interface:
      </p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">input_policy</span>
<span class="special">{</span>
    <span class="comment">// Input is the same type used as the first template parameter</span>
    <span cla