Re: [boost] [SmartPointers] Determine interest in a new pointer wrapper class "flex_ptr"

Subject: Re: [boost] [SmartPointers] Determine interest in a new pointer wrapper class "flex_ptr"
From: Gottlob Frege (gottlobfrege_at_[hidden])
Date: 2015-03-27 16:16:24

On Wed, Mar 25, 2015 at 8:55 AM, Jakob Riedle <jakob.riedle_at_[hidden]> wrote:
>> A null-deleter would make it basically non-owning..
>
> That doesn't solve Efficiency, but it allows for non-owning shared_ptr's.
> Thank you!
>

It doesn't, however, solve the underlying safety issues.  Smart
Pointers tend to be smart in two ways:

- track ownership to correctly delete object
- be safe

With flex_ptr (or shared_ptr with custom deleter), how do you know
that a non-null flex_ptr is pointing to valid memory or not.
Or if it is valid on this line, but not the next, due to threading or something.

Tony