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Is this use of Object.magic safe?
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Date: -- (:)
From: Anton Moscal <msk@p...>
Subject: Re: Is this use of Object.magic safe?
On Mon, 13 Nov 2000, Stephan Houben wrote:

> I have three questions:
> 1. Is this safe w.r.t. the garbage collector? Or am I going to confuse the GC?
> 2. Can I safely marshall values?
> 3. Is it worth the trouble? Perhaps O'Caml already does something smart
>    when a constructor of the form `Int of int' is encountered?

Answers for 1 & 2 is true,
for 3 - false: if you try to run the following program:

let _ = Printf.printf "%b\n" 
  (value_of_int 0 == value_of_allocated_value True)

you got "true" as the result.

The cause is the following: variant without arguments 
represented in the same way with int's.

Correct solution will be:

type allocated_value =
  Bool of bool 
| String of string 
| Array of value

Regards,
Anton Moscal