using reference values in follow up parser rule

[kingwill101]

Hi , I'm currently working on a liquid parser and i'm trying to parse tags that have a closing tag

{% sometag %}
   sometag content
{% endsometag %}

I am already able to parse tags with their inner blocks reliable but not for unknown tags

This is what i am currently doing but using pattern is not a reliable way to properly match the closing tag

extension DynamicTagExtension on LiquidGrammar {
  Parser dynamicTag() {
    return seq2(tag(), ref0(element).starLazy(pattern('^end').trim()))
        .map((values) {
      return values;
    });
  }
}

what i want to do is essentially

match on the property name coming from the tag() parser
so would become

ref0(element).starLazy(string("end${tag().name}").trim())