Function operator--

include/magic_enum/magic_enum_containers.hpp:302–306

  }

  [[nodiscard]] constexpr FilteredIterator operator--(int) {
    FilteredIterator cp = *this;
    --*this;
    return cp;
  }

  [[nodiscard]] friend constexpr bool operator==(const FilteredIterator& lhs, const FilteredIterator& rhs) { return lhs.current == rhs.current; }