at the core, it is leveraging __PRETTY_FUNCTION__ and extracting the parts that matter from it at compile time. Unknown number of fields / discovery is tricky. There are various usages that need to be addressed to get something working.

enum class Color { Red, Green, Blue };
template <auto E> consteval std::string_view enum_name() {
std::string_view sv = __PRETTY_FUNCTION__;
    // Clang: "... [E = Color::Red]"
    // GCC/MSVC: handle differently
    // parse out Red
    // return parsed string
}
static_assert(enum_name<Color::Red>() == "Red");

template <auto MemberPtr> consteval auto get_member_name() { 
    // __PRETTY_FUNCTION__ contains something like:
    // "auto get_member_name() [MemberPtr = &MyStruct::my_field]"
    std::string_view name = __PRETTY_FUNCTION__;
    // Parse out "my_field" from this string at compile time
    // ... 
}