现代C ++中的位掩码类型

Question

现代C ++中声明位掩码类型的现代方法是什么？对此有推荐吗？

// old C, not recommended in C++
#define COLOR_BLUE 1 << 0
#define COLOR_RED 1 << 1

 // Prefer enum class instead of enum, also it's a good practice to use unsigned, not enums(int)
enum Color 
{
  blue = 1 << 0;
  red = 1 << 1;
}

// a class with access only to these members
// additional lines to delete unnecessary data, delete ctors, etc
class Color
{
public:
  static constexpr unsigned int blue = 1 << 0;
  static constexpr unsigned int red = 1 << 1;
  Color() = delete;
}

bitset.set(Color::blue);