module Lazy_sequence: sig .. end
type +'a t
include Container.S1
val iteri : 'a t -> f:(int -> 'a -> unit) -> unit
val foldi : 'a t ->
init:'state -> f:(int -> 'state -> 'a -> 'state) -> 'state
val map : 'a t -> f:('a -> 'b) -> 'b t
val mapi : 'a t -> f:(int -> 'a -> 'b) -> 'b t
val filter : 'a t -> f:('a -> bool) -> 'a t
val filter_map : 'a t -> f:('a -> 'b option) -> 'b t
val filter_mapi : 'a t -> f:(int -> 'a -> 'b option) -> 'b t
val fold_map : 'a t ->
init:'state -> f:('state -> 'a -> 'state * 'b) -> 'b t
val filter_fold_map : 'a t ->
init:'state -> f:('state -> 'a -> 'state * 'b option) -> 'b t
val concat : 'a t t -> 'a t
val concat_seq_list : 'a t list -> 'a t
val concat_list_seq : 'a list t -> 'a t
val concat_map : 'a t -> f:('a -> 'b list) -> 'b t
val hd : 'a t -> 'a option
val last : 'a t -> 'a option
val nth : 'a t -> int -> 'a option
val tl : 'a t -> 'a t
val take : 'a t -> int -> 'a t
val drop : 'a t -> int -> 'a t
val append : 'a t -> 'a t -> 'a t
val sub : 'a t -> pos:int -> len:int -> 'a t
val filter_map_partial : 'a t ->
f:('a -> [ `Continue of 'b option | `Stop ]) -> 'b t
val zip_full : 'a t ->
'b t -> ('a option * 'b option) t
val length_if_at_most : max:int -> 'a t -> int option
val length_bounded_by : ?min:int -> ?max:int -> 'a t -> bool
val of_list : 'a list -> 'a t
val init : (int -> 'a option) -> 'a t
val read_lines : string -> string t
val force : 'a t -> 'a t
module Iterator: sig .. end
val empty : 'a t
val (==>) : 'a -> (unit -> 'a t) -> 'a t
val (==>>) : 'a list -> (unit -> 'a t) -> 'a t
val initialize : (unit -> 'a t) -> 'a t
val protect : finally:(unit -> unit) -> (unit -> 'a t) -> 'a t