mixin EFlags on Enum {
  int get value => 1 << index;
}

/// A simple universal bitmask object
class BitMask {
  int _mask = 0;

  BitMask(this._mask);

  void setBit(int bit) {
    _mask |= bit;
  }

  void unsetBit(int bit) {
    _mask ^= bit;
  }

  int get value => _mask;

  factory BitMask.of(int? val) {
    if (val == null)
      return BitMask(0);
    else
      return BitMask(val);
  }
}