mirror of
https://github.com/c-cube/ocaml-containers.git
synced 2025-12-06 03:05:28 -05:00
86 lines
2.8 KiB
OCaml
86 lines
2.8 KiB
OCaml
|
|
(*
|
|
copyright (c) 2013, simon cruanes
|
|
all rights reserved.
|
|
|
|
redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
redistributions of source code must retain the above copyright notice, this
|
|
list of conditions and the following disclaimer. redistributions in binary
|
|
form must reproduce the above copyright notice, this list of conditions and the
|
|
following disclaimer in the documentation and/or other materials provided with
|
|
the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*)
|
|
|
|
(** {1 Bidirectional Iterators}
|
|
|
|
Iterators that can be traversed in both directions *)
|
|
|
|
type 'a t =
|
|
| Nil
|
|
| Cons of (unit -> 'a t) * 'a * (unit -> 'a t)
|
|
|
|
val nil : 'a t
|
|
(** Empty iterator *)
|
|
|
|
val insert_before : 'a -> 'a t -> 'a t
|
|
(** Insert the given element before the current slot in the
|
|
* given iterator *)
|
|
|
|
val insert_after : 'a -> 'a t -> 'a t
|
|
(** Insert the element right after the current one *)
|
|
|
|
val left : 'a t -> 'a t
|
|
(** Go left once. Doesn't do anything on empty iterator. *)
|
|
|
|
val right : 'a t -> 'a t
|
|
(** Go right once. Doesn't do anything on empty iterator. *)
|
|
|
|
val graft_before : inner:'a t -> 'a t -> 'a t
|
|
(** [insert ~inner outer] grafts [inner] just before the current element of
|
|
[outer]. *)
|
|
|
|
val graft_after : inner:'a t -> 'a t -> 'a t
|
|
|
|
val rev : 'a t -> 'a t
|
|
(** Reverse the order of iteration *)
|
|
|
|
(** {2 Right-iteration}
|
|
traverse the right part of the iterator. traversing the left is
|
|
easily done with {!rev}. *)
|
|
|
|
val fold : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a
|
|
(** Fold on elements starting from the current one, to the right end *)
|
|
|
|
val to_rev_list : 'a t -> 'a list
|
|
(** To reverse list *)
|
|
|
|
val to_list : 'a t -> 'a list
|
|
(** Conversion to list. Only traverse the right part. *)
|
|
|
|
val of_list : 'a list -> 'a t
|
|
(** Iterate on the list *)
|
|
|
|
(** {2 Full constructor} *)
|
|
|
|
val of_lists : 'a list -> 'a -> 'a list -> 'a t
|
|
|
|
(** {2 Moves} *)
|
|
|
|
val left_n : int -> 'a t -> 'a list * 'a t
|
|
(** Move left n times, and return the n elements traversed (at most),
|
|
from left-most one to right_most one.*)
|
|
|
|
val right_n : int -> 'a t -> 'a list * 'a t
|