:relfileprefix: ../../../
[#boost-urls-authority_view-port]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/authority_view.adoc[pass:[authority_view]]::port


Return the port


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/authority_view.hpp#L1133[boost/url/authority_view.hpp,window=blank_]>`

[source,cpp,subs="verbatim,macros,-callouts"]
----
core::string_view
port() const noexcept;
----

== Description


If present, this function returns a
string representing the port (which
may be empty).
Otherwise it returns an empty string.

=== Example
[,cpp]
----
assert( url_view( "http://localhost.com:8080" ).port() == "8080" );
----

=== Complexity

Constant.

=== Exception Safety

Throws nothing.

=== BNF
[,cpp]
----
port        = *DIGIT
----

=== Specification

* link:https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.3[3.2.3. Port (rfc3986)]








== See Also


xref:boost/urls/authority_view/encoded_host_and_port.adoc[encoded_host_and_port]
,
xref:boost/urls/authority_view/has_port.adoc[has_port]
,
xref:boost/urls/authority_view/port_number.adoc[port_number]
.