125   T* get() const { return value_; }  in get()
126   T* operator->() const { return value_; }
127   T& operator*() const { return *value_; }
132     T* v = value_;  in release()
133     value_ = NULL;  in release()
137   bool operator==(T* p) const { return value_ == p; }
138   bool operator!=(T* p) const { return value_ != p; }
141     return value_ == ptr.get();
145     return value_ != ptr.get();
152   T* value_;  variable
156     if (link_.depart()) delete value_;  in depart()  local
160     value_ = ptr;  in capture()
165     value_ = ptr->get();  in copy()
166     if (value_)  in copy()