21 Internet protocol [internet]

21.6 Class ip::address_v6 [internet.address.v6]

21.6.4 ip::address_v6 static members [internet.address.v6.static]

static constexpr address_v6 any() noexcept;

1

Returns: An address a such that the a.is_unspecified() == true and a.scope_id() == 0.

static constexpr address_v6 loopback() noexcept;

2

Returns: An address a such that the a.is_loopback() == true and a.scope_id() == 0.