On Tue, Jun 08, 2004 at 01:08:13PM -0000, Ingo Blechschmidt wrote:
> Hello,
>
> quoting Apocalypse 6:
> > You may ask a subroutine to wrap itself up in another subroutine in
> > place, so that calls to the original are intercepted and interpreted by
> > the wrapper, even if access is only through the reference:
> >
> > $id = $subref.wrap({
> > # preprocessing here
> > call;
> > # postprocessing here
> > }
> [...]
> > The $id is useful for removing a particular wrapper:
> >
> > $subref.unwrap($id);
Hmmm. What happens when I do this?:
$id1 = $subref.wrap({ <stuff> });
$id2 = $subref.wrap({ <more stuff> });
$id3 = $subref.wrap({ <other stuff> });
$id4 = $subref.wrap({ <different stuff> });
$subref.unwrap($id3);
First off, is this even valid?
Second, what does it do under the hood? Does it need to tear off
wrappers 1 and 2 before tearing off #3? Does it need to recompile
wrappers 1 and 2? What kind of speed hit am I looking at?
--Dks
