T (base.Base.Indexed_container.Make

type ('a, 'phantom) t

type 'a elt

val fold : ('a, 'phantom) t -> init:'acc -> f:('acc -> 'a elt -> 'acc) -> 'acc

val iter : 
  [ `Custom of ('a, 'phantom) t -> f:('a elt -> unit) -> unit
  | `Define_using_fold ]

val length : [ `Custom of ('a, 'phantom) t -> int | `Define_using_fold ]

val iteri : 
  [ `Custom of ('a, 'b) t -> f:(int -> 'a elt -> unit) -> unit
  | `Define_using_fold ]

val foldi : 
  [ `Custom of ('a, 'b) t -> init:'c -> f:(int -> 'c -> 'a elt -> 'c) -> 'c
  | `Define_using_fold ]