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Re: Object as a member to object/class [message #58699 is a reply to message #58698]

Tue, 12 February 2008 13:57

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On Feb 12, 1:45 pm, Sven Utcke <utcke+n...@informatik.uni-hamburg.de>
wrote:
> I'm plainly too stupid for the following: I would like to have an
> object as a member to a second class. I.e. I have something like
> this:
>
> PRO MODBUS__DEFINE
> struct = { MODBUS, Host:"hasgkssccdkal.desy.de", Port:502, tid:0L }
> END
>
> and, later on,
>
> PRO GKSSBC__DEFINE
> struct = { GKSSBC, Con:Obj_New(), addr:'4020'XL, Factor:1.0, Steps:200, Micro:6 }
> END
>
> Now, I would _like_ to do something like
>
> FUNCTION GKSSBC::INIT, addr = addr, factor = factor, con = con
> IF KEYWORD_SET(addr) THEN self.Addr = addr ELSE self.Addr = '4020'XL
> IF KEYWORD_SET(factor) THEN self.Factor = factor ELSE self.Factor = 1.0
> IF KEYWORD_SET(con) THEN self.Con = con ELSE self.Con = obj_new("modbus")
> return, 1
> END
>
> But even just doing
>
> FUNCTION GKSSBC::INIT
> self.Con = obj_new("modbus")
> return, 1
> END
>
> does't wor at all in IDL 6.4 (it results in something like:
>
> % Object reference expression not allowed in this context: <OBJREF
> (<ObjHeapVar38(MODBUS)>)>.
> % Execution halted at: GKSSBC::INIT 13
> /afs/desy.de/user/u/utcke/src/Modbus/gkss9100C.pro
> % OBJ_NEW
> % $MAIN$
>
> So how does this _really_ work?
>
> Any help appreciated!

Your code works for me. The only thing I can think of is that you
might have changed the definition of self.con without .reset-ing or
exiting IDL?

Mike
--
www.michaelgalloy.com
Tech-X Corporation
Software Developer II

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[Message index]

		Re: Object as a member to object/class By: Michael Galloy on Tue, 12 February 2008 16:50
		Re: Object as a member to object/class By: ben.bighair on Tue, 12 February 2008 14:10
		Re: Object as a member to object/class By: Michael Galloy on Tue, 12 February 2008 13:57
		Re: Object as a member to object/class By: Sven Utcke on Thu, 14 February 2008 06:13

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