             be in sequence; this is equivalent to <code class="computeroutput"><span class="identifier">a</span>
              <span class="special">&gt;&gt;</span> <span class="special">-</span><span class="identifier">b</span> <span class="special">|</span> <span class="identifier">b</span></code>, but more efficient.
            </li>
</ul></div>
<h6>
<a name="spirit.qi.tutorials.roman_numerals.h3"></a>
          <span class="phrase"><a name="spirit.qi.tutorials.roman_numerals.let_s_parse_"></a></span><