/* bitflags operators */

template <class T>
concept bool BitFlagsType = requires(T t) { BitFlagsEnabler(t); } ;

template <BitFlagsType T>
T operator | (T a,T b) { return T( unsigned(a)|b ); }

template <BitFlagsType T>
T operator |= (T &a,T b) { return a=(a|b); }

/* enum CharFlags */

enum CharFlags : unsigned
 {
  CharNull   = 0,

  CharLetter = Bit(0),
  CharDigit  = Bit(1),
  CharPunct  = Bit(2),
  CharQuote  = Bit(3),
  CharSpace  = Bit(4),
  CharEOL    = Bit(5),

  CharHex    = Bit(6),
  CharOct    = Bit(7),

  CharPunct2 = Bit(8),
  CharPunct3 = Bit(9)
 };

inline void BitFlagsEnabler(CharFlags) {} // включаем битовые операции с этим типом