class problem

[Frank Steinicke]

Hello ng,

i have the following (object orientated) problem:

i have 2 classes, "Class1" and "Class2".
Now "Class1" calls a function "func" of the "Class2".

Is it possible to know out of the "Class2", which class called the
function "func" ?

And how do you realise this ?

Thanks and best regards, frank

[Ron Natalie]

Re: class problem


"Frank Steinicke" <steinicke@web. de> wrote in message news:bk7664$slu $1@redenix.uni-muenster.de...[color=blue]
>
> Is it possible to know out of the "Class2", which class called the
> function "func" ?[/color]

No. C++ functions (member or otherwise) have no
inate idea of how they were called.
[color=blue]
> And how do you realise this ?[/color]

You need to pass in what ever information the called function needs
as an argument.

[Buster Copley]

Re: class problem

Frank Steinicke wrote:[color=blue]
> i have the following (object orientated) problem:
>
> i have 2 classes, "Class1" and "Class2".
> Now "Class1" calls a function "func" of the "Class2".
>
> Is it possible to know out of the "Class2", which class called the
> function "func" ?
>
> And how do you realise this ?[/color]

This reminds me of Borland's VCL, where functions used as event
callbacks have 'TObject * Sender' as their first parameter. These
functions then know from which object they were called. To get
the class would typically require RTTI.

I don't know if this is any help to you. Good luck.

Regards,
Buster.

[Mr E Mann]

Re: class problem

Pass a reference to Class1 into Class2 when you instantiate Class2.
Otherwise, the answer to your question is no.