Method clear

ppcc/adlib/bitset.h:88–91

    _data[index(i)] |= bit(i);
  }
  void clear(Int i) {
    require(i < _bits, "index out of range");
    _data[index(i)] &= ~bit(i);
  }
  bool test(Int i) {
    require(i < _bits, "index out of range");
    return (_data[index(i)] & bit(i)) != 0;