From: why the lucky stiff <ruby-core@...>
Date: 2003-06-18T00:41:29+09:00
Subject: Copying RVALUE

Hello, everyone.  Hope you are all doing well.

Without going into terrible details, I am looking for a way to move an
object in the symbol table.  I am currently using memcpy with some
success:

   /* VALUE to, from; */
   MEMCPY( (void *)to, (void *)from, RVALUE, 1 );

The problem is that RVALUE struct is hidden in gc.c and I know of no way
to retrieve a sizeof( RVALUE ).  I have looked at DUPSETUP and
CLONESETUP, but these are inferior to simply copying the memory.

I am trying to solve a problem with circular references.  So, I will not
be copying Fixnums, Strings, Booleans, Qnil, etc.  Does any have any
suggestions?  Am I overlooking an API call that can do this?

_why