From: Simon Strandgaard <0bz63fz3m1qt3001@...>
Date: 2003-04-08T10:11:44+09:00
Subject: Re: Out of scope - close/finalizers

On Tue, 08 Apr 2003 03:06:32 +0200, MikkelFJ wrote:
> "MikkelFJ" <mikkelfj-anti-spam@bigfoot.com> wrote in message
> news:3e921047$0$136$edfadb0f@dtext01.news.tele.dk...
> 
>> > Is it correct there does'nt exist any "out-of-scope" feature?
>>
>> http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/6966
> 
> and then again:
> http://www.eng.dmu.ac.uk/~hgs/ruby/RUBY_SNAPSHOT_RDOC/classes/Finalizer.html
> http://www.eng.dmu.ac.uk/~hgs/ruby/RUBY_SNAPSHOT_RDOC/files/lib/ruby/1_8/finalize_rb.html


I know you can do like this:

   def use(resource)
     resource.open
     yield
   ensure
     resource.close
   end

   use(alien_connection) do
     # do somethine 
   end

In order to use it, you must supply a block. 

Finalizers gets invoked when a object is being garbage collected. This is
not necessarily when the object goes out-of-scope. Thus finalizers cannot
be used to get notify on "out-of-scope". Am I right here?


What I wanna make sure is that "blocks" is the one-and-only way to get
notify on "out-of-scope"?


Or is there other options, which im not aware of?


--
Simon Strandgaard

BTW. The reason why im asking is that im writing a text on how to embed
ruby into c++. I don't wanna write incorrect stuff :-)
http://metaeditor.sf.net/embed/