">generate</span><span class="special">(</span><span class="identifier">sink</span><span class="special">,</span>

        <span class="comment">//  Begin grammar</span>
        <span class="special">(</span>
           <span class="special">&amp;</span><span class="identifier">true_</span> <span class="special">&lt;&lt;</span> <span class="char">'('</span> <span class="special">&lt;&lt;</span> <span class="identifier">double_</span> <span class="special">&lt;&lt;</span> <span class="string">", "</span> <sp