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Re: Are user-defined private methods possible? [message #67198 is a reply to message #67172]

Wed, 08 July 2009 12:17

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

Fï¿½LDY Lajos wrote:
>
> On Wed, 8 Jul 2009, Paul van Delst wrote:
>
>> As the subject states, are user-defined private methods possible in IDL?
>>
>> I have some object methods that I want to be private to the class
>> (like Init and Cleanup) but I can't find any info on how to do that in
>> the IDL help. Once the methods in question are invoked (and, thus,
>> compiled) in a public method, they're accessible from outside the class.
>
> You can not prevent calls to your "private" methods, but you can check
> whether the caller is a method of your class or not:
>
> ; cut here, copy to test.pro and .ru test
> ;
> pro o::private
> catch, stranger
> if stranger ne 0 then $
> begin
> catch, /cancel
> goto, prn
> endif
>
> if not obj_isa((scope_varfetch('self', level=-1)), 'o') then stranger=1
>
> prn:
> if stranger ne 0 then print, 'private call failed' $
> else print, 'private call succeeded'
> end
>
>
> pro o::public
> self->private
> end
>
>
> s={o, i:0}
> o=obj_new('o')
> print, 'calling private from class method:'
> o->public
> print, 'calling private directly:'
> o->private
> end
>
> ; cut here

schweet! I'll see if I can put this code in my error handler include file for use....

Thanks,

paulv

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[Message index]

		Re: Are user-defined private methods possible? By: Oliver on Fri, 10 July 2009 01:33
		Re: Are user-defined private methods possible? By: Paul Van Delst[1] on Wed, 08 July 2009 12:17
		Re: Are user-defined private methods possible? By: Paul Van Delst[1] on Wed, 08 July 2009 12:16
		Re: Are user-defined private methods possible? By: Foldy Lajos on Wed, 08 July 2009 11:56
		Re: Are user-defined private methods possible? By: David Fanning on Wed, 08 July 2009 10:59

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