Return the host IPv6 address

Synopsis

Declared in header </boost/url/url_view_base.hpp#L1256[boost/url/url_view_base.hpp,window=blank_]>

ipv6_address
host_ipv6_address() const noexcept;

Description

If the host type is host_type::ipv6, this function returns the address as a value of type ipv6_address. Otherwise, if the host type is not an IPv6 address, it returns a default-constructed value which is equal to the unspecified address "0:0:0:0:0:0:0:0".

Example

assert( url_view( "ftp://[::1]/" ).host_ipv6_address() == ipv6_address( "::1" ) );

Complexity

Constant.

Exception Safety

Throws nothing.

BNF

IPv6address =                            6( h16 ":" ) ls32
            /                       "::" 5( h16 ":" ) ls32
            / [               h16 ] "::" 4( h16 ":" ) ls32
            / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
            / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
            / [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
            / [ *4( h16 ":" ) h16 ] "::"              ls32
            / [ *5( h16 ":" ) h16 ] "::"              h16
            / [ *6( h16 ":" ) h16 ] "::"

ls32        = ( h16 ":" h16 ) / IPv4address
            ; least-significant 32 bits of address

h16         = 1*4HEXDIG
            ; 16 bits of address represented in hexadecimal

Specification

Return Value

  • ipv6_address