an class="mdzsyn-coresym">def</span> <span class="mdzsyn-symbol">grammar</span>
  ~{<span class="mdzsyn-keyword">:ws</span> (<span class="mdzsyn-coresym">set</span> <span class="mdzsyn-string">" \t\r\f\n\0\v"</span>)
    <span class="mdzsyn-keyword">:readermac</span> (<span class="mdzsyn-coresym">set</span> <span class="mdzsyn-string">"';~,|"</span>)
    <span class="mdzsyn-keyword">:symchars</span> (<span class="mdzsyn-coresym">+</span> (<span class="mdzsyn-coresym">range</span> <span class="mdzsyn-string"