[SG10] No __cpp_concepts in the C++20 draft

John Spicer jhs at edg.com
Fri Mar 1 14:45:00 CET 2019


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?
> 
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