On 12/01/2022 21.34, Barry Revzin via SG10 wrote:
> Strong preference for 2.

Agreed.  This is a relatively minor upgrade
to the existing ranges stuff and not really
a fresh, clearly separable feature (such as
a new algorithm).

Jens


> As I pointed out in the telecon, __cpp_lib_ranges has already been bumped 
> twice for changes to basic concepts 
> (https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations#__cpp_lib_ranges
>  
> <https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations#__cpp_lib_ranges>)
>  that were both much larger than this: dropping the default constructor 
> requirement (P2325) and clarify the O(1) rule and adding owning_view (P2415).
>
> I don't think we have any other changes in flight for __cpp_lib_ranges that 
> would conflict with this either.
>
> Barry
>
> On Wed, Jan 12, 2022 at 1:36 PM Michał Dominiak via SG10 
> <[email protected] <mailto:[email protected]>> wrote:
>
>     Hello, SG10!
>
>     When P2494 <http://wg21.link/P2494> was being discussed in LEWG, there 
> were two competing directions for how to handle its feature test macro:
>
>      1. introduce a new feature test macro that indicates this feature 
> specifically; and
>      2. bump __cpp_lib_ranges, since other features in flight for ranges have 
> their own feature test macros.
>
>     LEWG requested that I ask this group for a recommendation. Personally I'm 
> leaning towards option number 1, since it feels cleaner to me.
>
>     Additionally, if this group recommends that I go with (1), I'd like 
> recommendations for what the name of the macro should be, because none of the 
> names that I'm coming up with are short enough to be usable, but also long 
> enough to be descriptive.
>
>     Thanks,
>     Michał
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