:relfileprefix: ../../../
[#1AEC20B36596A9932A4CE92E42E709508D1FA4EF]

= Function static_url::set_host_ipv6

pass:v,q[Set the host to an address]


== Synopsis

Declared in header `</boost/url/static_url.hpp#L384[boost/url/static_url.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
xref:boost/urls/static_url.adoc[static_url]&
set_host_ipv6(const xref:boost/urls/ipv6_address.adoc[ipv6_address]& addr);
----

== Description

pass:v,q[The host is set to the specified IPv6] pass:v,q[address.] pass:v,q[The host type is]
xref:boost/urls/host_type/ipv6.adoc[host_type::ipv6.]

=== Example
[,cpp]
----
assert( url().set_host_ipv6( ipv6_address( "1::6:c0a8:1" ) ).authority().buffer() == "[1::6:c0a8:1]" );
----

=== Postconditions
[,cpp]
----
this->has_authority() == true && this->host_ipv6_address() == addr && this->host_type() == host_type::ipv6
----

=== Complexity
pass:v,q[Linear in `this->size()`.]

=== Exception Safety
pass:v,q[Strong guarantee.]
pass:v,q[Calls to allocate may throw.]

=== BNF
[,cpp]
----
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

* link:https://datatracker.ietf.org/doc/html/rfc4291[IP Version 6 Addressing Architecture (rfc4291)]

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2[            3.2.2. Host (rfc3986)]



== Return Value

* `` 


== Parameters

|===
| Name | Type 

| *addr*
| ``

|===