Re: object copy with reference

From:

Philipp Kraus <philipp.kraus@flashpixx.de>

Newsgroups:

comp.lang.c++

Date:

Mon, 26 Sep 2011 21:02:36 +0200

Message-ID:

<j5qi8c$vn4$1@online.de>

On 2011-09-26 10:26:23 +0200, Werner said:

On Sep 25, 1:43?pm, Philipp Kraus <philipp.kr...@flashpixx.de> wrote:

Hello,

I need a tip / hint for solving the following problem:

I have a class method that is run in different threads:
myclass::mythreadmethod( mysuperclass& )

mysuperclass is a reference variable, that is used during the thread is
running.
Anyway the method should be myclass::mythreadmethod( mysuperclass ), so that
each running thread has a own local copy of the object, but I can't
switch the parameter
because the method is derivated of another class.

I need in the method a local (deep-copy) of my object. So I create a
clone method like
myclass::mythreadmethod( mysuperclass& pobj )
{
? ? mysuperclass& lobj = p_obj.clone();

}

In this case I get the compiler error, that I try to set up a temporary
assignment.

The try to do it like
myclass::mythreadmethod( mysuperclass& pobj )
{
? ? mysuperclass& lobj;
? ?p_obj.clone(lobj);}

create the message l_obj isn't initializate.

Does anyone has some tips to create a working solution? The perfect solution
should be a deep-copy of the pobj reference

Thanks

Phil

How about making mysuperclass a pointer (or a smart pointer of some
kind), then you can initialize it to zero (or in the case of smart_ptr
it happens automatically). I'd use scoped_ptr in this case..., but as
example I'd this use a bald pointer...

Thanks, I#M using smart-pointer, i don't see the solution with pointer :-P