Re: [Boost-users] [shared_ptr] get_deleter is for what?

From: Ben Hutchings (ben.hutchings_at_[hidden])
Date: 2005-03-22 10:47:26

Mark Holloway wrote:
> I realise my requirements may be rather specific, but it seems
> shared_ptr has picked up some typeid baggage, which I can't afford.

Whyever not?

> I'm compiling using MSVC7.1 and for each object for which I use a
> shared_ptr, I gain an entry in my binary. For example, class Monty
> generates the following string in my exe:
> 	?AU?$checked_deleter_at_VMonty@@@boost@@
> 
> This seems to be sucked in by this function in class
> sp_counted_base_impl:
>     virtual void * get_deleter(std::type_info const & ti)
>     {
>         return ti == typeid(D)? &del: 0;
>     }
> 
> It isn't being used, and I can't actually see anything in boost using
> this, so maybe the compiler isn't doing a great job at stripping unused
> stuff?
> 
> Anyone shed some light on this for me?

Virtual functions generally can't be dropped by the linker because it 
cannot tell whether or not they are used.

Ben.