Re: Hello everybody, I have something to share about the shared_ptr class

From: Peter Dimov (pdimov_at_[hidden])
Date: 2020-07-31 20:42:33

ÒÝÁØ Ñî wrote:

> Please check code on
> https://github.com/yyl-20020115/RCGC

As far as I can tell, rcgc_shared_ptr<T> calls the destructor of T as soon 
as its destructor is invoked, regardless of whether other references exist. 
That is,

int main()
{
    rcgc_shared_ptr<X> p1( new X );

    {
        rcgc_shared_ptr<X> p2( p1 );
    } // ~X is called here

    // *p1 references a destroyed object here
}

This doesn't seem correct to me; the point of shared_ptr is to not call the 
destructor of the pointee as long as references (such as p1 in the code 
above) exist to it.