"><span class="identifier">description</span></code>
          keyword (in this hypothetical example we allow keywords to be directly
          followed by an optional <code class="computeroutput"><span class="string">"--"</span></code>):
        </p>
<p>
</p>
<pre class="programlisting"><span class="special">{</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span> <span class="identifier">str</span><span class="special">(</span><span class="strin