def do_call(self, parser: BasicParser) -> Node:
if parser.begin_tag(self.tagname):
# subcontext
parser.push_rule_nodes()
res = self.pt(parser)
parser.pop_rule_nodes()
if res and parser.end_tag(self.tagname):
tag = parser.get_tag(self.tagname)
# no bindings, wrap it in a Node instance
if type(res) is bool:
res = Node()
# update node cache
parser.tag_node(self.tagname, res)
parser.rule_nodes[self.tagname] = res
# forward nodes
return res
return False
