45   std::string* raw_;  variable
52     : raw_(raw)  in interned_string()
61     : raw_()  in interned_string()
68   {raw_ = o.raw_;}  in interned_string()
76     raw_ = o.raw_;
83   {raw_ = 0;}  in clear()
91   {return !raw_;}  in empty()
100   {return raw_;}  in raw()
114   {return raw_ == o.raw_;}
139     if (raw_)
140       return *raw_ == o;
177     if (!raw_)  in string()
179     return *raw_;  in string()