ss="special">::</span><span class="identifier">illegal_backtracking</span></code> exception will be
        thrown.
      </p>
<h5>
<a name="spirit.support.multi_pass.h2"></a>
        <span class="phrase"><a name="spirit.support.multi_pass.the_multi_pass_policies"></a></span><a class="link" href="multi_pass.html#spirit.support.multi_pass.the_multi_pass_policies">The
        multi_pass Policies</a>
      </h5>
<p>
        The <code class="computeroutput"><span class="identifier">multi_pass</span></code> iter