129     AddrInfo() : ai_(nullptr), error_(0) {}  in AddrInfo()
131     AddrInfo(const char* node, const char* service, const addrinfo& hints) : ai_(nullptr) {  in AddrInfo()
135     AddrInfo(const char* node, const char* service) : ai_(nullptr) {  in AddrInfo()
143         error_ = getaddrinfo(node, service, &hints, &ai_);  in init()
149         error_ = getaddrinfo(node, service, nullptr, &ai_);  in init()
154         if (ai_ != nullptr) {  in clear()
155             freeaddrinfo(ai_);  in clear()
156             ai_ = nullptr;  in clear()
161     const addrinfo& operator*() const { return *ai_; }  in operator *()
162     const addrinfo* get() const { return ai_; }  in get()
163     const addrinfo* operator&() const { return ai_; }  in operator &()
167     addrinfo* ai_;  member in AddrInfo