On 4/1/06, Marco Correia 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

me22 wrote: libraries

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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

Marco Correia wrote:

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?

Well, you can use typeid() to figure out the type of the object. I don't know why you loose the type information, but it's your job to find it again, no matter what approach you use. I can't comment more specific with the infor you gave. -Thorsten