How to resolve the algorithm Address of a variable step by step in the OCaml programming language

Published on 12 May 2024 09:40 PM
#Ocaml

How to resolve the algorithm Address of a variable step by step in the OCaml programming language

Table of Contents

Problem Statement

Demonstrate how to get the address of a variable and how to set the address of a variable.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Address of a variable step by step in the OCaml programming language

Source code in the ocaml programming language

let address_of (x:'a) : nativeint =
  if Obj.is_block (Obj.repr x) then
    Nativeint.shift_left (Nativeint.of_int (Obj.magic x)) 1 (* magic *)
  else
    invalid_arg "Can only find address of boxed values.";;

let () =
  let a = 3.14 in
  Printf.printf "%nx\n" (address_of a);;
  let b = ref 42 in
  Printf.printf "%nx\n" (address_of b);;
  let c = 17 in
  Printf.printf "%nx\n" (address_of c);; (* error, because int is unboxed *)

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