# Module Obj

    module Obj: sig .. end

Operations on internal representations of values.

Not for the casual user.

    type t

    val repr : 'a -> t

    val obj : t -> 'a

    val magic : 'a -> 'b

    val is_block : t -> bool

    val is_int : t -> bool

    val tag : t -> int

    val set_tag : t -> int -> unit

    val size : t -> int

    val field : t -> int -> t

    val set_field : t -> int -> t -> unit

    val double_field : t -> int -> float

    val set_double_field : t -> int -> float -> unit

    val new_block : int -> int -> t

    val dup : t -> t

    val truncate : t -> int -> unit

    val add_offset : t -> Int32.t -> t

    val lazy_tag : int

    val closure_tag : int

    val object_tag : int

    val infix_tag : int

    val forward_tag : int

    val no_scan_tag : int

    val abstract_tag : int

    val string_tag : int

    val double_tag : int

    val double_array_tag : int

    val custom_tag : int

    val final_tag : int

    val int_tag : int

    val out_of_heap_tag : int

    val unaligned_tag : int

The following two functions are deprecated. Use module `Marshal` instead.

    val marshal : t -> string

    val unmarshal : string -> int -> t * int