Return the IPv6 Zone ID
Synopsis
Declared in header <boost/url/url_view_base.hpp>
template<class StringToken = string_token::return_string>
StringToken::result_type
zone_id(StringToken&& token) const;Description
If the host type is host_type::ipv6 , this function returns the Zone ID as a string. Otherwise an empty string is returned. Any percent-escapes in the string are decoded first.
Example
assert( url_view( "http://[fe80::1%25eth0]/" ).zone_id() == "eth0" );Complexity
Linear in this->encoded_zone_id().size().
Exception Safety
Calls to allocate may throw.
BNF
host = IP-literal / IPv4address / reg-name
IP-literal = "[" ( IPv6address / IPv6addrz / IPvFuture ) "]"
ZoneID = 1*( unreserved / pct-encoded )
IPv6addrz = IPv6address "%25" ZoneID