
  [;1m-type mp() :: {re_pattern, _, _, _, _}.[0m

  Opaque data type containing a compiled regular expression. [;;4mmp()[0m
  is guaranteed to be a tuple() having the atom [;;4mre_pattern[0m as its
  first element, to allow for matching in guards. The arity of the
  tuple or the content of the other fields can change in future
  Erlang/OTP releases.
