Re: [Boost-users] [ptr_container] Does ptr_map delete objects if inserting fails?

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2007-09-24 10:05:18

Boris skrev:
> On Mon, 24 Sep 2007 11:06:06 +0300, Thorsten Ottosen  
> <thorsten.ottosen_at_[hidden]> wrote:
> 
>> Boris skrev:
>>> struct foo { };
>>> boost::ptr_map<int, foo> bar;
>>> bar.insert(1, new foo());
>>> bar.insert(1, new foo());
>>>
>>> Does this code leak? Or does bar delete the second instance of foo?
>> The containers never leak. (If so, it is a bug).
> 
> I asked as it wasn't clear to me if the container takes responsibility for  
> deleting the second instance as after all it isn't stored in the  
> container. I understand now that the code is safe though. Thanks for your  
> reply!

http://www.boost.org/libs/ptr_container/doc/ptr_multimap_adapter.html#modifiers

in particular:

"Effects: Takes ownership of x and returns an iterator pointing to it."

-Thorsten