package base

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package base
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Provides generic signatures for containers that support indexed iteration (iteri, foldi, ...). In principle, any container that has iter can also implement iteri, but the idea is that Indexed_container_intf should be included only for containers that have a meaningful underlying ordering.

module type S1 = sig ... end

Generic definitions of foldi and iteri in terms of fold.

E.g., iteri ~fold t ~f = ignore (fold t ~init:0 ~f:(fun i x -> f i x; i + 1)).

val foldi : fold:('t -> init:'accum -> f:('accum -> 'a -> 'accum) -> 'accum) -> 't -> init:'accum -> f:(int -> 'accum -> 'a -> 'accum) -> 'accum
val iteri : fold:('t -> init:int -> f:(int -> 'a -> int) -> int) -> 't -> f:(int -> 'a -> unit) -> unit

Generic definitions of indexed container operations in terms of foldi.

val counti : foldi:('t -> init:int -> f:(int -> int -> 'a -> int) -> int) -> 't -> f:(int -> 'a -> bool) -> int

Generic definitions of indexed container operations in terms of iteri.

val existsi : iteri:('t -> f:(int -> 'a -> unit) -> unit) -> 't -> f:(int -> 'a -> bool) -> bool
val for_alli : iteri:('t -> f:(int -> 'a -> unit) -> unit) -> 't -> f:(int -> 'a -> bool) -> bool
val findi : iteri:('t -> f:(int -> 'a -> unit) -> unit) -> 't -> f:(int -> 'a -> bool) -> (int * 'a) option
val find_mapi : iteri:('t -> f:(int -> 'a -> unit) -> unit) -> 't -> f:(int -> 'a -> 'b option) -> 'b option
module Make (T : sig ... end) : S1 with type 'a t := 'a T.t
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