67     explicit Data(const T& in) : generic(in) {}  in Data()
68     Data(const T& in, const Traits& other) : Traits(other), generic(in) {}  in Data()
69     T generic;  member
106     if (data_.generic != traits_type::InvalidValue() && data_.generic == value)
109     data_.generic = value;
118     swap(data_.generic, other.data_.generic);  in swap()
125     element_type old_generic = data_.generic;  in release()
126     data_.generic = traits_type::InvalidValue();  in release()
130   const element_type& get() const { return data_.generic; }  in get()
134   bool is_valid() const { return data_.generic != traits_type::InvalidValue(); }  in is_valid()
137     return data_.generic == value;
140     return data_.generic != value;
148     if (data_.generic != traits_type::InvalidValue()) {  in FreeIfNecessary()
149       data_.Free(data_.generic);  in FreeIfNecessary()
150       data_.generic = traits_type::InvalidValue();  in FreeIfNecessary()