{

public:

// Constructs to IPv4 address 0.0.0.0

ip_address() noexcept;

ip_address(ipv4_address address) noexcept;

ip_address(ipv6_address address) noexcept;

bool is_ipv4() const noexcept { return m_family == family::ipv4; }

bool is_ipv6() const noexcept { return m_family == family::ipv6; }

const ipv4_address& to_ipv4() const;

const ipv6_address& to_ipv6() const;

const std::uint8_t* bytes() const noexcept;

std::string to_string() const;

static std::optional<ip_address> from_string(std::string_view string) noexcept;

bool operator==(const ip_address& rhs) const noexcept;

bool operator!=(const ip_address& rhs) const noexcept;

// ipv4_address sorts less than ipv6_address

bool operator<(const ip_address& rhs) const noexcept;

bool operator>(const ip_address& rhs) const noexcept;

bool operator<=(const ip_address& rhs) const noexcept;

bool operator>=(const ip_address& rhs) const noexcept;

private:

enum class family

{

ipv4,

ipv6

};

family m_family;

union

{

ipv4_address m_ipv4;

ipv6_address m_ipv6;

};

: m_family(family::ipv6)

, m_ipv6(address)

{