OCaml library : Obj (original) (raw)
Module Obj
module Obj: sig .. end
Operations on internal representations of values.
Not for the casual user.
type ``t
type ``raw_data = nativeint
val repr : 'a -> [t](Obj.html#TYPEt)
val obj : [t](Obj.html#TYPEt) -> 'a
val magic : 'a -> 'b
val is_block : [t](Obj.html#TYPEt) -> bool
val is_int : [t](Obj.html#TYPEt) -> bool
val tag : [t](Obj.html#TYPEt) -> int
val size : [t](Obj.html#TYPEt) -> int
val reachable_words : [t](Obj.html#TYPEt) -> int
Computes the total size (in words, including the headers) of all heap blocks accessible from the argument. Statically allocated blocks are included.
- Since 4.04
val field : [t](Obj.html#TYPEt) -> int -> [t](Obj.html#TYPEt)
val set_field : [t](Obj.html#TYPEt) -> int -> [t](Obj.html#TYPEt) -> unit
When using flambda:
set_field MUST NOT be called on immutable blocks. (Blocks allocated in C stubs, or with new_block below, are always considered mutable.)
The same goes for set_double_field.
For experts only:set_field et al can be made safe by first wrapping the block inSys.opaque_identity, so any information about its contents will not be propagated.
val double_field : [t](Obj.html#TYPEt) -> int -> float
val set_double_field : [t](Obj.html#TYPEt) -> int -> float -> unit
val raw_field : [t](Obj.html#TYPEt) -> int -> [raw_data](Obj.html#TYPEraw%5Fdata)
val set_raw_field : [t](Obj.html#TYPEt) -> int -> [raw_data](Obj.html#TYPEraw%5Fdata) -> unit
val new_block : int -> int -> [t](Obj.html#TYPEt)
val dup : [t](Obj.html#TYPEt) -> [t](Obj.html#TYPEt)
val add_offset : [t](Obj.html#TYPEt) -> [Int32.t](Int32.html#TYPEt) -> [t](Obj.html#TYPEt)
val with_tag : int -> [t](Obj.html#TYPEt) -> [t](Obj.html#TYPEt)
val first_non_constant_constructor_tag : int
val last_non_constant_constructor_tag : int
val forcing_tag : int
val cont_tag : int
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 int_tag : int
val out_of_heap_tag : int
val unaligned_tag : int
module Extension_constructor: sig .. end