Re: object copy with reference

From:

Werner <werasm@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Tue, 27 Sep 2011 02:08:19 -0700 (PDT)

Message-ID:

<f9de4cb5-5cd8-410b-b9b8-3bb0993216e0@12g2000vbu.googlegroups.com>

On Sep 27, 8:34 am, Werner <wer...@gmail.com> wrote:

On Sep 26, 9:02 pm, Philipp Kraus <philipp.kr...@flashpixx.de> wrote:

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

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

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=

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 tempor=

ary

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_pt=

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

Just be careful of auto_ptr in general. If possible, use scoped_ptr,
otherwise be sure to overload your copy constructor and assignment
operator.

Kind regards,

Werner

I meant to say "override" the copy constructor / assignment operator,
not "overload" (for those who are linguistically pedantic - I realize
the difference).

Kind regards,

Werner

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