On 11/03/2021 17.55, codusnocturnus via Std-Proposals wrote:
> On Thu, Mar 11, 2021 at 3:14 PM, Carlos ORyan wrote:
>> I would like to propose an attribute [[experimental(msg)]], with
>> similar semantics to [[deprecated(msg)]].
>
> Why not just a generic compiler diagnostic message mechanism?
>
> [[diagnostic(level, msg)]]
> Where level in { info, warn, error }
>
> Relieve the compiler of the need to care about the reason.

...because from [[experimental(msg)]] naturally follows
-W[no-]experimental. There would be no way to control a diagnostic such
as you propose, except perhaps with a very blunt instrument.

-- 
Matthew