alt Hacker NewsI wish I understood the reason for the `std::define_static_array`... Why can't `std::meta::enumerators_of` just return something that can be iterated through????
I wish I understood the reason for the `std::define_static_array`... Why can't `std::meta::enumerators_of` just return something that can be iterated through????
It 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