Dune_re.ViewSourcetype t = | Set of Dune_re__.Cset.t| Sequence of Dune_re__.Core.t list| Alternative of Dune_re__.Core.t list| Repeat of Dune_re__.Core.t * int * int option| Beg_of_line| End_of_line| Beg_of_word| End_of_word| Not_bound| Beg_of_str| End_of_str| Last_end_of_line| Start| Stop| Sem of [ `Longest | `Shortest | `First ] * Dune_re__.Core.t| Sem_greedy of [ `Greedy | `Non_greedy ] * Dune_re__.Core.t| Group of string option * Dune_re__.Core.t| No_group of Dune_re__.Core.t| Nest of Dune_re__.Core.t| Case of Dune_re__.Core.t| No_case of Dune_re__.Core.t| Intersection of Dune_re__.Core.t list| Complement of Dune_re__.Core.t list| Difference of Dune_re__.Core.t * Dune_re__.Core.t| Pmark of int * Dune_re__.Core.tA view of the top-level of a regex. This type is unstable and may change