Re: Smart Pointer Issue

From:

anon <sfdhrtbgf@ebay.de>

Newsgroups:

comp.lang.c++

Date:

Fri, 13 Feb 2009 09:45:04 +0100

Message-ID:

<gn3bug$5lt$1@news01.versatel.de>

SG wrote:

On 12 Feb., 14:00, anon <sfdhrt...@ebay.de> wrote:

kmakaro...@gmail.com wrote:

Hello, I have the following classes:
class ServiceBase
{
        public:
                ServiceBase() {}
                ~ServiceBase() {}

[...]

ServicePtr& operator=( ServicePtr<ServiceBase>& r)
         {
             release();

             ServicePtr cpyObj( dynamic_cast<X*> (r.get()));
             r.release();
             acquire(cpyObj);
             cpyObj.release();

             return *this;
         }

dynamic_castis not going to work on non-polymorphic types.

Cheers!
SG

This solves the problem. Anyone trying something stupid with the
template will notice :

ServicePtr& operator=( ServicePtr<ServiceBase>& r)
           {
               release();

               X *tmp = dynamic_cast<X*> (r.get());
               assert( NULL != tmp );

               ServicePtr cpyObj( tmp );
               r.release();
               acquire(cpyObj);
               cpyObj.release();

               return *this;
           }