13 // The Flags class provides a type-safe way of storing OR-combinations of enum
14 // values. The Flags<T, S> class is a template class, where T is an enum type,
23 class Flags FINAL {
28   Flags() : mask_(0) {}  in Flags()  function
29   Flags(flag_type flag) : mask_(flag) {}  // NOLINT(runtime/explicit)  in Flags()  function
30   explicit Flags(mask_type mask) : mask_(mask) {}  in Flags()  function
32   Flags& operator&=(const Flags& flags) {
33     mask_ &= flags.mask_;
36   Flags& operator|=(const Flags& flags) {
37     mask_ |= flags.mask_;
40   Flags& operator^=(const Flags& flags) {
41     mask_ ^= flags.mask_;
45   Flags operator&(const Flags& flags) const { return Flags(*this) &= flags; }
46   Flags operator|(const Flags& flags) const { return Flags(*this) |= flags; }
47   Flags operator^(const Flags& flags) const { return Flags(*this) ^= flags; }
49   Flags& operator&=(flag_type flag) { return operator&=(Flags(flag)); }
50   Flags& operator|=(flag_type flag) { return operator|=(Flags(flag)); }
51   Flags& operator^=(flag_type flag) { return operator^=(Flags(flag)); }
53   Flags operator&(flag_type flag) const { return operator&(Flags(flag)); }
54   Flags operator|(flag_type flag) const { return operator|(Flags(flag)); }
55   Flags operator^(flag_type flag) const { return operator^(Flags(flag)); }
57   Flags operator~() const { return Flags(~mask_); }