Re: Macros for setting / testing / getting value components in lobject.h

[Dibyendu Majumdar <mobile@...>]

On 9 June 2015 at 13:00, Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:
>> My implementation is on 64-bit machine with 64-bit integers - so it
>> can work on 64-bit.
>
> How do you do that??
>

I overlay the double with the type code.

So the structure looks like this:

|------ first 8 bytes ----------| |------- second 8 bytes -------|
  value other than double        type code (int) union
  including 64-bit int                 with double

Since the size of the value object is 16 bytes anyway it doesn't
change the overall size.

Regards
Dibyendu