I took the name of the macro directly from the core issue title. This macro will be important for implementing certain library functionality (e.g. constexpr invoke), but there was concern expressed in Evolution as to the specific choice of the name of this macro. Richard in session suggested that the name should be something like __cpp_constexpr_decltype instead, given that that's what the issue's resolution is kind of about.
Does anybody having any naming preference for this macro?
Thanks,
Barry