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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2016 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(** Skewed lists
This is a purely functional datastructure isomorphic to usual lists, except
that it features a O(log n) lookup while preserving the O(1) cons operation.
*)
(** {5 Constructors} *)
type +'a t
val empty : 'a t
val cons : 'a -> 'a t -> 'a t
(** {5 List operations} *)
val is_empty : 'a t -> bool
val length : 'a t -> int
val map : ('a -> 'b) -> 'a t -> 'b t
val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a
val fold_right : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b
val hd : 'a t -> 'a
val tl : 'a t -> 'a t
val skipn : int -> 'a t -> 'a t
(** {5 Indexing operations} *)
val get : 'a t -> int -> 'a
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