@type context() :: map()

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

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

@type parsec_result() :: parsec_success() | parsec_failure()

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

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

@type tokens() :: [token()]