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Re: syntax for calling parent class _overloadPlus method [message #93113 is a reply to message #93105]

Thu, 28 April 2016 13:35

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 4/28/16 7:01 AM, Markus Schmassmann wrote:
> i'm trying to overload operators for my subclass of idl_variable, but
> don't find the correct syntax for calling the parent classes' operator
> function.
>
> How do i have to correct the line below marked ';problem' without using
> 'left+right'?
> i guess i have to put something like XXX.idl_variable::_overload...
> but what would then be XXX?
>
> ---
> pro sandbox__define
> struct={sandbox, $
> inherits idl_variable, $
> reps: ptr_new() $
> }
> end
>
> function sandbox::Init, array, reps
> ; a bit of code
> void=self.idl_variable::init()
> void=self.idl_variable::set_value(array)
> *self.reps=reps
> return, 1
> end
>
> function sandbox::_overloadPlus, left, right
> ; some code
> out=idl_variable::_overloadPlus(left,right) ;problem
> ; some more code
> return, out
> end
> ---
>
> PS: Sorry, stupid question of a beginner, but i failed to find the
> solution elsewhere.
> PPS: There may be more errors, but the rest at least compiles.

In general, you would use something like the following to call a
parent's implementation:

out = self->IDL_Variable::overloadPlus(left, right)

You can use the . notation you used in ::init as well:

out = self.IDL_Variable::overloadPlus(left, right)

But, in your case, you are calling some methods that don't exist. As
far as I can tell, there are no IDL_Variable::init,
IDL_Variable::set_value, and IDL_Variable::_overloadPlus methods.

Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)

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[Message index]

		syntax for calling parent class _overloadPlus method By: Markus Schmassmann on Thu, 28 April 2016 06:01
		Re: syntax for calling parent class _overloadPlus method By: Michael Galloy on Thu, 28 April 2016 13:35
		Re: syntax for calling parent class _overloadPlus method By: Markus Schmassmann on Fri, 29 April 2016 02:45
		Re: syntax for calling parent class _overloadPlus method By: Michael Galloy on Tue, 03 May 2016 10:05

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