[Boost-users] Re: function, bind & shared_ptr

From: Rene Rivera (grafik.list_at_[hidden])
Date: 2004-12-27 09:55:52

Roland Schwarz wrote:
> I have found that it is bossible to create an in place functor like object
> by combining function, bind and shared_ptr.
> 
> However altough it seems to work I am not sure whether this is safe
> usage. I would be glad if someone more knowledgeable had a look
> on it:
> 
> class bar {
>    void foo() {
>    }
> };
> 
> boost::function<void ()> pfoo;
> 
> int main(int argc, char* argv[])
> {
>    pfoo = boost::bind(&bar::foo, boost::shared_ptr<bar>(new bar));
>    pfoo();
>   // ...
>    pfoo = 0; // this operation causes the ~bar dtor to be called
>    return 0;
> }

Not only is it designed to work.. But it's a documented use case:

http://www.boost.org/libs/bind/bind.html#with_member_pointers

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