Take a look at Anthony williams‘ jss::object_ptr. I consider it an improved version of observer_ptr

Peter

sent from a mobile device so please excuse strange words due to autocorrection. 
Prof. Peter Sommerlad
peter.Sommerlad@hsr.ch
+41-79-432 23 32

On 11 Nov 2019, at 06:34, Steve Weinrich via Std-Proposals <std-proposals@lists.isocpp.org> wrote:


Well, the inclusion in the extensions is by no means a guarantee of inclusion in a future standard. A quick Google search reveals this view:



In any case, it seems that my notion is not new. Thanks!

On Sun, Nov 10, 2019, 22:20 Jorg Brown <jorg.brown@gmail.com> wrote:
> Is it in serious consideration? 

Consideration for what?  It's part of Version 2 of the C++ Extensions for Library Fundamentals, ISO/IEC TS 19568:2017.

Code such as this currently compiles:

#include <experimental/memory>

int f() {
  int a = 1;
  std::experimental::observer_ptr<int> op(&a);
  *op += 1;
  return a;
}

As can be seen at https://godbolt.org/z/GQFeh4

= - = - = - = - =

> the current convention of using raw pointers to represent transient pointers.

std::span<T, 1> might also fill that need, depending on your application.


On Sun, Nov 10, 2019 at 9:09 PM Steve Weinrich via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
None. I was not aware of observer_ptr. Is it in serious consideration? 

On Sun, Nov 10, 2019, 22:03 Andrew Tomazos <andrewtomazos@gmail.com> wrote:

On Mon, Nov 11, 2019 at 1:45 PM Steve Weinrich via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
I was thinking that a non_owned_ptr would be a good std addition. The idea is to formalize the current convention of using raw pointers to represent transient pointers (transient_ptr might be a better name).

Aside from a lot of details, it would simply be a template wrapper around a raw pointer. On destruction, the wrapper would do nothing. 

This would allow the enforcement of the intended behavior. 

What do you all think? 
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