Re: [boost] [shared_ptr] towards a static_cast applied to smart_ptr

Subject: Re: [boost] [shared_ptr] towards a static_cast applied to smart_ptr
From: Emil Dotchevski (emil_at_[hidden])
Date: 2008-10-03 02:07:49

On Thu, Oct 2, 2008 at 10:41 PM, vicente.botet <vicente.botet_at_[hidden]> wrote:
> This is normal as void* is not convertibel to X*. But in my program I can
> ensure that the pointeed object by ptr_void is a X pointer. So it would be
> safe to do a kind of static_cast on shared_ptr. At the end smart pointers
> should behave like pointers.
>
> Can I achieve this already? I was thinking is something like something like
>
> shared_ptr<X> ptrX2(boost::static_cast<shared_ptr<X> >(ptr_void));

Use boost::static_pointer_cast. You can also use the aliasing
constructor to do tricks like make a shared_ptr point to a subobject
of the pointee, for example you can make a shared_ptr<float> from a
shared_ptr<std::pair<int,float> >.

Emil Dotchevski
Reverge Studios, Inc.
http://www.revergestudios.com/reblog/index.php?n=ReCode