https://github.com/skypjack/entt
https://github.com/skypjack/entt/blob/meta/docs/meta.md
https://skypjack.github.io/tags/#ecs

2019
https://www.reddit.com/r/cpp/comments/cx21wv/entt_v31_is_out_gaming_meets_modern_c_a_fast_and/
https://www.reddit.com/r/gamedev/comments/bzipca/entt_ecs_c_meets_reactive_systems_kind_of/
https://www.reddit.com/r/cpp/comments/bziprx/entt_ecs_c_meets_reactive_systems_kind_of/
2018
https://www.reddit.com/r/cpp/comments/9lg1v7/reflection_in_c_the_way_of_entt_part_2/
https://www.reddit.com/r/cpp/comments/9gljxi/reflection_in_c_the_way_of_entt/
http://www.stargrave.org/ZFS-proscons.html