Re: [Boost-users] enable_shared_from_this - or an alternative..

From: James Hughes (JHughes_at_[hidden])
Date: 2006-03-20 09:27:06

> > 
> >> 
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 
> 
> is the following snipped what you have in mind?
> 
> struct base {};
> struct derived1 : public base {};
> struct derived2 : public derived1 {};
> 
> typedef boost::shared_ptr<base> base_ptr;
> 
> struct monitor
> {
> 	void
> 	add( const base_ptr & _ptr)
> 	{
> 		// ...
> 	}
> };
> 
> struct factory
> {
> 	factory( monitor & _monitor ) :
> 		monitor_(_monitor)
> 	{
> 	}
> 
> 	template<typename T>
> 	boost::shared_ptr<T>
> 	create( void )
> 	{
> 		boost::shared_ptr<T> tmp(new T);
> 		monitor_.add(tmp);
> 		return tmp;
> 	}
> 
> private:
> 	monitor & monitor_;
> };
> 
> void
> foo( void )
> {
> 	monitor m;
> 	factory f(m);
> 	f.create<derived1>();
> 	f.create<derived2>();
> }
> 
> -- dave
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
> 

Hi Dave,

Yes, I think that pretty much does exactly what I require. And gives me a
(almost comnpletely) generic factory class to boot!

Thanks very much!

James