cursor() :: {column :: integer(), row :: integer()}

leaf() :: {token :: token(), children :: [leaf()]}

tag_attr() ::
  {:tag_attr, cursor(), name :: charlist(), value :: charlist(),
   is_dynamic :: boolean()}

tag_comment() :: {:tag_comment, cursor :: cursor(), value :: charlist()}

tag_condition() ::
  {condition :: :if | :else | :elseif | :unless, cursor :: cursor(),
   value :: charlist()}

tag_end() :: {:tag_end, cursor :: cursor(), name :: charlist()}

tag_iterator() :: {iterator :: :for, cursor :: cursor(), value :: charlist()}

tag_output() ::
  {:tag_output, cursor :: cursor(), value :: charlist(),
   is_html_escape :: boolean()}

tag_start() ::
  {:tag_start, cursor :: cursor(), name :: charlist(),
   attributes :: [tag_attr()], condition :: tag_condition(),
   iterator :: tag_iterator(), is_singleton :: boolean(),
   is_selfclosed :: boolean(), is_component :: boolean()}

tag_text() ::
  {:tag_text, cursor :: cursor(), value :: charlist(),
   is_leading_whitespace :: boolean(), is_blank :: boolean()}

text_group() :: {:text_group, cursor :: cursor(), tag_name :: charlist()}

token() ::
  tag_start()
  | tag_end()
  | tag_text()
  | tag_output()
  | text_group()
  | tag_comment()