Module Heap_block = Core_kernel.Heap_block


type +'a t = private 'a
val sexp_of_t : ('a -> Sexplib.Sexp.t) -> 'a t -> Sexplib.Sexp.t
val create : 'a -> 'a t option

create v returns Some t if v is a heap block, where t is physically equal to v

val create_exn : 'a -> 'a t
val value : 'a t -> 'a

value t returns the value that is physically equal to t

val bytes : _ t -> int

bytes t returns the number of bytes on the heap taken by heap block t, including the header. This is just the space for the single block, not anything it points to.