alt Hacker NewsIt is kind of weird at first but the reason is that `std::vector` requires heap allocation and transient allocations are not allowed in `constexpr` contexts. The purpose of `std::define_static_array` is to promote the storage of the vector to static storage to eliminate the transient allocation issue, and so that the `template for` can work properly with it.
See wg21.link/P3491
Is there a reason why `std::meta::enumerators_of`, a reflection feature that's surely almost exclusively going to be used in constexpr contexts, returns a value which doesn't work in constexpr contexts?