[boost] Re: Questions

From: Ronen Halsadi (RonenH_at_[hidden])
Date: 2000-03-16 11:30:57

I'm using Microsoft VC++ version 6

> -----Original Message-----
> From:	Valentin Bonnard [SMTP:Bonnard.V_at_[hidden]]
> Sent:	ä 16 îøõ 2000 17:22
> To:	boost_at_[hidden]
> Subject:	[boost] Re: Questions
> 
> ronenh_at_[hidden] wrote:
> 
> > How can I pass APtr object to method that get ConstAPtr.
> 
> Just do it.
> 
> > How can I use Polymorphism with smart pointer.
> 
> It should work.
> 
> > class A {
> > :
> >    virtual void DoIt();
> > :
> > };
> > typedef shared_ptr<A> APtr;
> > typedef shaerd_ptr<const A> ConstAPtr;
> > 
> > class Drive : public A{
> > :
> >   virtual void DoIt();
> > :
> > };
> > typedef shared_ptr<Drive> DrivePtr;
> 
> > void main()
>   ^^^^
> Hum hum
> 
> >    Drive d;
> 
> >    DrivePtr pD(&d);
>                  ^^
> Hum hum
> 
> The following should compile:
> 
> $ cat smart-ptr-const.cc                                    
> #include "smart_ptr.h"
> 
> using namespace boost;
> 
> typedef shared_ptr<A> APtr;
> typedef shared_ptr<const A> ConstAPtr;
> 
> void func (ConstAPtr) {}
> 
> int main ()
> {
>   APtr p;
>   func (p);
> }
> 
> (I get an ICE, but should not.)
> 
> Anyway, the conversions won't work if your compiler
> doesn't support template member function.
> 
> -- 
> 
> Valentin Bonnard
> 
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