I would note, by the by, that your example implementation invokes UB (and
in fact precisely the UB I mention in my proposal draft that happens with
the "obvious" implementation).

On Sun, Aug 21, 2022 at 4:36 PM Michael Scire <sciresm_at_[hidden]> wrote:

> I e-mailed std::proposals about this last year
> (std::parent_of_member/std::containing_object_of_member), and got as far as
> writing a proposal paper, though I got too busy to submit it as a
> P-numbered proposal/etc.
>
> See here:
> https://github.com/SciresM/containing_object_of_member/blob/master/containing_object_of_member.pdf
>
> I am still interested in submitting the above, and it's the same
> fundamental operation you're requesting here.
>
> On Sun, Aug 21, 2022 at 4:23 PM Phil Bouchard via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
>
>>
>> On 8/21/22 19:10, Walt Karas wrote:
>>
>> Yes I'd bet big this technique is an often reinvented wheel.
>>
>> Why do you prefer two static casts involving void * over a reinterpret
>> cast? Also, your C style cast is really a reinterpret cast. I think the
>> reason for having reinterpret cast is that it's a (greppable) warning that
>> something is dangerous. And this technique is fairly dangerous, mistakes
>> can elude static checking.
>>
>> Yeah I just got the habit of not using any reinterpret_casts from the
>> Boost community standards, so it's just another way of writing them down.
>>
>> And I wasn't sure how alignments and little to big endian machines would
>> convert them.
>>
>>
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>>
>> On Sun, Aug 21, 2022 at 4:38 PM, Phil Bouchard via Std-Proposals
>> <std-proposals_at_[hidden]> <std-proposals_at_[hidden]> wrote:
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