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pointer to object confusion (C++ programmer, IDL n00b) [message #70726]

Mon, 03 May 2010 23:18

Matt Francis
Messages: 94
Registered: May 2010

Member

Hi All, I'm new to IDL but am a reasonable C++ coder. I'm trying to
set up some object classes in IDL and am having some trouble.

I can create custom objects and use them okay, but I can't seem to get
a custom object to use another custom object within it. So say I have
defined allready a class FOO, and now I want another class FOO2 which
stores within it an instance of FOO:

PRO FOO2__DEFINE
struct = {FOO2, ...., FOO:<???>, ...}
END

What I want to know is what goes in <???>. I can't use OBJ_NEW because
I don't know yet what arguments will be fed to FOO when it gets
instantiated in some method of FOO2. I tried using simply OBJ_NEW() to
get a null pointer, but then when I try something like

PRO FOO2::some_method
...
FOO = OBJ_NEW('FOO',[ARGS])
END

I get an error. I've tried various combinations of *FOO etc to try and
get the above to work without success.

Can anyone help me? I'm probably thinking too much like a C++
programmer here, but I can't see that I'm trying to do something crazy
so there must be a way to do this. Any hints?

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pointer to object confusion (C++ programmer, IDL n00b)

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