sig
type t
external repr : 'a -> Obj.t = "%identity"
external obj : Obj.t -> 'a = "%identity"
external magic : 'a -> 'b = "%identity"
external is_block : Obj.t -> bool = "obj_is_block"
external is_int : Obj.t -> bool = "%obj_is_int"
external tag : Obj.t -> int = "obj_tag"
external size : Obj.t -> int = "%obj_size"
external field : Obj.t -> int -> Obj.t = "%obj_field"
external set_field : Obj.t -> int -> Obj.t -> unit = "%obj_set_field"
external new_block : int -> len:int -> Obj.t = "obj_block"
external dup : Obj.t -> Obj.t = "obj_dup"
external truncate : Obj.t -> len:int -> unit = "obj_truncate"
val no_scan_tag : int
val closure_tag : int
val infix_tag : int
val object_tag : int
val abstract_tag : int
val string_tag : int
val double_tag : int
val double_array_tag : int
val final_tag : int
val marshal : Obj.t -> string
val unmarshal : string -> int -> Obj.t * int
end