On Wed, Apr 28, 2021 at 10:34 AM Christopher Hallock <
christopherhallock_at_[hidden]> wrote:

> On Tue, Apr 27, 2021 at 11:02 AM Giuseppe D'Angelo via Std-Discussion <
> std-discussion_at_[hidden]> wrote:
>
>> [vector.modifiers] says that inserting an element at position `p`
>> invalidates all iterators, references and pointers from position `p`
>> onwards.
>>
>> I'm wondering why there's such a requirement for pointers (and
>> references) [...]
>>
>
> This kind of Library provision, saying that iterators, pointers, and
> references to elements are invalidated upon condition X, seems overly broad
> even if you don't care about using pointers in an "index-like" way, because
> it means you can't safely use an element type that stores (and properly
> updates across moves/copies) the 'this' pointer as a member. I suspect that
> the real intent of this kind of provision is that it only applies to
> iterators, pointers, and references obtained through the container's API.
>

Gah, never mind. On further reflection, this is not actually a problem
because the member would be overwritten on copy/move.