cast that performs the conversions of a reinterpret_cast is not allowed in a constant expression

[0vercl0k]

I've come across this error on clang-11:

../libs/kdmp-parser/src/lib/kdmp-parser-structs.h:39:20: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
constexpr uint64_t OffsetFromThis(const void *This, const void *Field) {
                   ^
../libs/kdmp-parser/src/lib/kdmp-parser-structs.h:40:10: note: cast that performs the conversions of a reinterpret_cast is not allowed in a constant expression
  return uint64_t(Field) - uint64_t(This);
         ^
1 error generated.