context() :: map()

parsec() :: (String.t() -> parsec_result())

parsec_failure() ::
  {:error, String.t(), String.t(), context(), {integer(), integer()}, integer()}

parsec_result() :: parsec_success() | parsec_failure()

parsec_success() :: {:ok, tokens(), String.t(), context(), integer(), integer()}

token() :: {atom(), map(), iodata()}

tokens() :: [token()]