I don't see how a library like Enchantum could handle everything reflection does. (How) does it figure out duplicate enum values, for example? And (how) does it discover arbitrarily large, discontiguous ranges? And (how) does it do these on MSVC?

In short, it probes enum values in a pre-defined range (e.g. [-256; 256]), and parses the `__PRETTY_FUNCTION__` macro at compile-time to extract the name of the enumerator.

Once you have that in place, you can easily detect duplicates, etc...

Of course, there are major limitations, as it's all a big hack: https://github.com/ZXShady/enchantum/blob/main/docs/limitati...

Similarly interesting is Boost.PFR, which gives you reflection superpowers since C++14: https://github.com/boostorg/pfr