Module Obj_array

module Obj_array: sig .. end

An array of Obj.ts.

This is useful to have as its own type because we can implement faster get and set functions that know that they aren't dealing with double arrays and save a test for it. We also have set avoid the write barrier (caml_modify) in certain situations.

type t

val create : len:int -> t

create ~len returns an obj-array of length len, all of whose indices have value Obj.repr 0.

val singleton : Obj.t -> t

val empty : t

val length : t -> int

val get : t -> int -> Obj.t

val unsafe_get : t -> int -> Obj.t

val set : t -> int -> Obj.t -> unit

val unsafe_set : t -> int -> Obj.t -> unit

val unsafe_set_assuming_currently_int : t -> int -> Obj.t -> unit

unsafe_set_assuming_currently_int t i obj sets index i of t to obj, but only works correctly if Obj.is_int (get t i). This precondition saves a dynamic check.

unsafe_set_int_assuming_currently_int is similar, except the value being set is an int.

val unsafe_set_int_assuming_currently_int : t -> int -> int -> unit

val sub : t -> pos:int -> len:int -> t

sub t ~pos ~len returns a new array containing the len elements of t starting at pos.

val blit : src:t ->
       src_pos:int -> dst:t -> dst_pos:int -> len:int -> unit

blit is like Array.blit, except it uses our own for-loop to avoid caml_modify when possible. It is still not comparable to a memcpy.

val unsafe_blit : src:t ->
       src_pos:int -> dst:t -> dst_pos:int -> len:int -> unit

val truncate : t -> len:int -> unit

truncate t ~len shortens t's length to len. It is an error if len <= 0 or len > length t.