code: func yaml_parser_fetch_tag(parser *yaml_parser_t) bool {
  	// A tag could be a simple key.
  	if !yaml_parser_save_simple_key(parser) {
  		return false
  	}
  
  	// A simple key cannot follow a tag.
  	parser.simple_key_allowed = false
  
  	// Create the TAG token and append it to the queue.
  	var token yaml_token_t
  	if !yaml_parser_scan_tag(parser, &token) {
  		return false
  	}
  	yaml_insert_token(parser, -1, &token)
  	return true
  }
docs: // Produce the TAG token.