Module Doubly_linked

module Doubly_linked: sig .. end

creating doubly-linked lists

module Elt: sig .. end

type 'a t

include Container.S1

val invariant : 'a t -> unit

val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a t -> Sexplib.Sexp.t

val create : unit -> 'a t

creating doubly-linked lists

val of_list : 'a list -> 'a t

of_list l returns a doubly-linked list t with the same elements as l and in the same order (i.e. the first element of l is the first element of t). It is always the case that l = to_list (of_list l).

val equal : 'a t -> 'a t -> bool

predicates

val is_first : 'a t -> 'a Elt.t -> bool

val is_last : 'a t -> 'a Elt.t -> bool

val first_elt : 'a t -> 'a Elt.t option

constant-time extraction of first and last elements.

val last_elt : 'a t -> 'a Elt.t option

val first : 'a t -> 'a option

val last : 'a t -> 'a option

val next : 'a t -> 'a Elt.t -> 'a Elt.t option

constant-time move to next or previous element.

val prev : 'a t -> 'a Elt.t -> 'a Elt.t option

val insert_before : 'a t -> 'a Elt.t -> 'a -> 'a Elt.t

constant-time insertion of a new element.

val insert_after : 'a t -> 'a Elt.t -> 'a -> 'a Elt.t

val insert_first : 'a t -> 'a -> 'a Elt.t

val insert_last : 'a t -> 'a -> 'a Elt.t

val remove : 'a t -> 'a Elt.t -> unit

constant-time removal of an element.

val remove_first : 'a t -> 'a option

val remove_last : 'a t -> 'a option

val find_elt : 'a t -> f:('a -> bool) -> 'a Elt.t option

find_elt t ~f finds the first element in t that satisfies f, by testing each of element of t in turn until f succeeds.

val clear : 'a t -> unit

clear t removes all elements from the list in constant time.

val copy : 'a t -> 'a t

copy t returns a copy of t.

val transfer : src:'a t -> dst:'a t -> unit

transfer ~src ~dst has the same behavior as iter src ~f:(insert_last dst); clear src except that it runs in constant time.

If s = to_list src and d = to_list dst, then after transfer ~src ~dst: to_list src = [] to_list dst = d @ s