21 Internet protocol [internet]

21.4 Class ip::address [internet.address]

21.4.5 ip::address creation [internet.address.creation]

address make_address(const char* str); address make_address(const char* str, error_code& ec) noexcept; address make_address(const string& str); address make_address(const string& str, error_code& ec) noexcept; address make_address(string_view str); address make_address(string_view str, error_code& ec) noexcept;

1

Effects: Converts a textual representation of an address into an object of class address, as if by calling: 

address a;
address_v6 v6a = make_address_v6(str, ec);
if (!ec)
  a = v6a;
else{
  address_v4 v4a = make_address_v4(str, ec);
  if (!ec)
    a = v4a;
}
2

Returns: a.