Re: [Boost-users] does ptr_* solves this?

From: Marco Correia (mvc_at_[hidden])
Date: 2006-04-03 20:13:12

Hi,

Thanks for the ideas, however I do not understand how typeid may be used to 
solve this. How do I instantiate my deallocator with information that comes 
from typeid?

thanks again
Marco

On Monday 03 April 2006 14:41, Thorsten Ottosen wrote:
> me22 wrote:
>  > On 4/1/06, Marco Correia <mvc_at_[hidden]> wrote:
>  >> B* obj = my_alloc<D>::allocate(1);
>  >> obj = new (obj) B();
>  >> container.insert(obj);
>  >>
>  >> My problem is that when an object is removed from the container, I
>
> have to
>
>  >> explicitely deallocate it from my allocator, but the static info was
>
> lost, so
>
>  >> I cannot do
>  >>
>  >> my_alloc<?>::dealloc
>  >> I've asked in boost irc channel, and someone told me ptr_* boost
>
> libraries
>
>  >> solve this problem, is this correct?
>  >
>  > I don't think that the ptr_ ones will, but shared_ptr allows you to
>  > specify a custom deleter at construction, which seems to be to be just
>  > what you need.
>
> Well, if you need to keep the exact type around, you can use typeid().
> But you need that both with shared_ptr and ptr_vector.
>
> With ptr_vector, you can plug your allocator into new_clone() and
> delete_clone().
>
> -Thorsten
>
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-- 
Marco Correia <mvc_at_[hidden]>