:relfileprefix: ../../../
[#28F15DF1C8C5E52B3DA5838EABC5A1112FA1CE30]

= Function ipv6_address::is_v4_mapped

pass:v,q[Return true if the address is a mapped IPv4 address]


== Synopsis

Declared in header `</boost/url/ipv6_address.hpp#L288[boost/url/ipv6_address.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
bool
is_v4_mapped() const noexcept;
----

== Description

pass:v,q[This address type is used to represent the] pass:v,q[addresses of IPv4 nodes as IPv6 addresses.]

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc4291#section-2.5.5.2[            2.5.5.2. IPv4-Mapped IPv6 Address (rfc4291)]



== Return Value

* `bool`