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Re: Turn Object Automatic Clean-up Off? [message #81474 is a reply to message #81466]

Thu, 20 September 2012 08:07

Lajos Foldy
Messages: 176
Registered: December 2011

Senior Member

On Thursday, September 20, 2012 3:49:48 PM UTC+2, mschellens wrote:

> Out of curiosity:
>
> Could you please post an example code where this problem is exposed?
>
> How can an object which has no references any more be of relevance in an IDL program?
>
> I have a lack of imagination here.

Earlier, lost references could be restored. Try this example in a fresh IDL session:

; test.pro begin
pro s::print
print, "I'm fine!"
end

pro test
s={s, l:0}
o1=obj_new('s')
o1=0 ; lost reference
o2=obj_valid(1, /cast) ; restored
o2->print
end
; test.pro end

IDL> print, !version
{ x86_64 linux unix linux 7.0 Oct 25 2007 64 64}
IDL> test
I'm fine!
IDL>

IDL> print, !version
{ x86_64 linux unix linux 8.2 Apr 10 2012 64 64}
IDL> test
% Unable to invoke method on NULL object reference: <OBJREF (<NullObject>)>.

regards,
Lajos

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[Message index]

		Re: Turn Object Automatic Clean-up Off? By: DavidF[1] on Thu, 20 September 2012 14:32
		Re: Turn Object Automatic Clean-up Off? By: DavidF[1] on Thu, 20 September 2012 14:11
		Re: Turn Object Automatic Clean-up Off? By: Lajos Foldy on Thu, 20 September 2012 08:07
		Re: Turn Object Automatic Clean-up Off? By: David Fanning on Thu, 20 September 2012 07:09
		Re: Turn Object Automatic Clean-up Off? By: m_schellens on Thu, 20 September 2012 06:49
		Re: Turn Object Automatic Clean-up Off? By: Lajos Foldy on Tue, 18 September 2012 14:03
		Re: Turn Object Automatic Clean-up Off? By: DavidF[1] on Tue, 18 September 2012 13:57
		Re: Turn Object Automatic Clean-up Off? By: Lajos Foldy on Tue, 18 September 2012 13:43

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