package inquire

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Module LTerm_dlist

Mutable sequence of elements (deprecated)

A sequence is an object holding a list of elements which support the following operations:

  • adding an element to the left or the right in time and space O(1)
  • taking an element from the left or the right in time and space O(1)
  • removing a previously added element from a sequence in time and space O(1)
  • removing an element while the sequence is being transversed.
  • deprecated

    This module should be an internal implementation detail of Lwt, and may be removed from the API at some point in the future. Use any other doubly-linked list library as an alternative.

type 'a t

Type of a sequence holding values of type 'a

type 'a node

Type of a node holding one value of type 'a in a sequence

Operation on nodes

val remove : 'a node -> unit

Removes a node from the sequence it is part of. It does nothing if the node has already been removed.

Operations on sequence

val create : unit -> 'a t

create () creates a new empty sequence

val add_l : 'a -> 'a t -> 'a node

add_l x s adds x to the left of the sequence s

Sequence iterators

Note: it is OK to remove a node while traversing a sequence

val iter_l : ('a -> unit) -> 'a t -> unit

iter_l f s applies f on all elements of s starting from the left

val fold_l : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b

fold_l f s is:

  fold_l f s x = f en (... (f e2 (f e1 x)))

where e1, e2, ..., en are the elements of s