64     explicit Data(const T& in) : generic(in) {}  in Data()
65     Data(const T& in, const Traits& other) : Traits(other), generic(in) {}  in Data()
66     T generic;  member
103     if (data_.generic != traits_type::InvalidValue() && data_.generic == value)
106     data_.generic = value;
115     swap(data_.generic, other.data_.generic);  in swap()
122     element_type old_generic = data_.generic;  in release()
123     data_.generic = traits_type::InvalidValue();  in release()
131     return &data_.generic;  in receive()
134   const element_type& get() const { return data_.generic; }  in get()
138   bool is_valid() const { return data_.generic != traits_type::InvalidValue(); }  in is_valid()
141     return data_.generic == value;
144     return data_.generic != value;
152     if (data_.generic != traits_type::InvalidValue()) {  in FreeIfNecessary()
153       data_.Free(data_.generic);  in FreeIfNecessary()
154       data_.generic = traits_type::InvalidValue();  in FreeIfNecessary()