Function IsInSet

library/cpp/netliba/v6/udp_socket.cpp:90–92

    template <class T, class TElem>
    inline bool IsInSet(const T& c, const TElem& e) {
        return Find(c.begin(), c.end(), e) != c.end();
    }

    bool IsLocalIPv4(ui32 ip) {
        return IsInSet(LocalHostIPList[IPv4], ip);