:relfileprefix: ../../../
[#boost-urls-url_view_base-has_port]

= xref:boost.adoc[pass:[boost]]::xref:boost/urls.adoc[pass:[urls]]::xref:boost/urls/url_view_base.adoc[pass:[url_view_base]]::has_port


Return true if a port is present


== Synopsis

Declared in header `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/url_view_base.hpp#L1491[boost/url/url_view_base.hpp,window=blank_]>`

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

== Description


This function returns true if an
authority is present and contains a port.

=== Example
[,cpp]
----
assert( url_view( "wss://www.example.com:443" ).has_port() );
----

=== Complexity

Constant.

=== Exception Safety

Throws nothing.

=== BNF
[,cpp]
----
authority   = [ userinfo "@" ] host [ ":" port ]

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/url_view_base/encoded_host_and_port.adoc[encoded_host_and_port]
,
xref:boost/urls/url_view_base/port.adoc[port]
,
xref:boost/urls/url_view_base/port_number.adoc[port_number]
.



