[DGD] Re: A slight confusion about light-weight objects

[Erwin Harte]

On Mon, Mar 29, 2004 at 03:45:45PM +0000, Robert Forshaw wrote:
> In the docs it says:
> 
> "If the master object is itself a light-weight object, it will be copied."
> 
> Now, I don't see how it would be possible for the master object to be a 
> light-weight object. As generating a light-weight object means calling 
> new_object, and the parameter only accepts object pointers, the only way to 
> obtain a master object would be with compile_object, surely? And if that's 
> the case, then the initial object is never a light-weight object, its just 
> a plain old heavy one. Which kind of defeats the purpose of having 
> lightweight objects since the first instance (the master) still needs to be 
> destructed!

May I suggest you clear your mind and re-read what you just quoted?

The kfun at hand has this prototype:

  object new_object(object master)

And this is part of the description, with my comments added:

  If the master object (that'd be 'master' up there) is itself a
  light-weight object (so apparently new_object() can handle that just
  fine), it will be copied.

So you can do something like this, it looks like:

  object a, b, master;

  master = compile_object("/data/foo");
  a = new_object(master);
  a->set_some_data(...);

  b = new_object(a);

Cheers,

Erwin.
-- 
Erwin Harte <harte at is-here.com>
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