[SG10] [isocpp-core] No __cpp_concepts in the C++20 draft
Casey Carter
cartec69 at gmail.com
Fri May 31 22:42:00 CEST 2019
Ping.
Is this one someone's plate for Cologne, or does it need to be on mine?
On Fri, Mar 1, 2019 at 9:04 AM Hubert Tong <hubert.reinterpretcast at gmail.com>
wrote:
> I'm still hoping for some SG10 guidance on whether we want to query on
> what -> *Concept* does separately from whether *Concept* auto is
> available. There is also static_assert(C<T>) in the mix somewhere.
>
> -- HT
>
> On Fri, Mar 1, 2019 at 8:45 AM John Spicer <jhs at edg.com> wrote:
>
>> That seems appropriate to me (copying the core reflector).
>>
>> John.
>>
>> > On Mar 1, 2019, at 7:21 AM, Jonathan Wakely <cxx at kayari.org> wrote:
>> >
>> > The working draft doesn't specify a __cpp_concepts macro. I want to
>> know if I need to say "concept bool" or just "concept", so I expected to be
>> able to do:
>> >
>> > #if __cpp_concepts
>> > template<typename T>
>> > concept
>> > #if __cpp_concepts <= 201507
>> > bool
>> > #endif
>> > Foo = ...;
>> > #endif
>> >
>> > Should this be handled by a core issue?
>> >
>> > _______________________________________________
>> > Features mailing list
>> > Features at isocpp.open-std.org
>> > http://www.open-std.org/mailman/listinfo/features
>>
>> _______________________________________________
>> Features mailing list
>> Features at isocpp.open-std.org
>> http://www.open-std.org/mailman/listinfo/features
>>
> _______________________________________________
> Core mailing list
> Core at lists.isocpp.org
> Subscription: http://lists.isocpp.org/mailman/listinfo.cgi/core
> Link to this post: http://lists.isocpp.org/core/2019/03/5632.php
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.open-std.org/pipermail/features/attachments/20190531/bd2791fd/attachment.html
More information about the Features
mailing list