Re: [boost] [announce] Dynamic object factory v3

From: David Abrahams (dave_at_[hidden])
Date: 2008-03-12 21:37:03

on Sun Feb 24 2008, "Marco Costalba" <mcostalba-AT-gmail.com> wrote:

> On Sun, Feb 24, 2008 at 9:34 PM, Brian Ravnsgaard Riis
> <brian_at_[hidden]> wrote:
>>
>>  I don't deal in raw pointers in application code though (well, if I can
>>  avoid it), so I added methods to the
>>  dispatcher template to return shared_ptrs instead. get_shared_by_key was
>>  the name I hacked up.
>>
>
> Hi Brian,
>
>   thanks for your words.
>
> Actually the choice to mimic a standard operator new is mainly due to
>
> - Keep it simple and with well known behaviour, as a toy should be
>
> - Do not impose a choice on a particular smart pointer, but let the
> user wrap the returned pointer in his/her preferred one. Of course the
> smart pointer class could be passed in as a template parameter, but
> this complicates the implementation and so goes against one of my main
> goals with this factory.

You should return std::auto_ptr, which -- unlike shared_ptr -- doesn't
impose any permanent choice but is also safe.

-- 
Dave Abrahams
Boost Consulting
http://boost-consulting.com