ifier">x3</span><span class="special">::</span><span class="identifier">lexeme</span><span class="special">;</span>
    <span class="keyword">using</span> <span class="identifier">ascii</span><span class="special">::</span><span class="identifier">char_</span><span class="special">;</span>

    <span class="keyword">struct</span> <span class="identifier">quoted_string_class</span><span class="special">;</span>
    <span class="keyword">struct</span> <span class="identifier">person_class</span><span class="s