[#boost-urls-static_url-set_port]
= xref:boost.adoc[boost]::xref:boost/urls.adoc[urls]::xref:boost/urls/static_url.adoc[static_url]::set_port
:relfileprefix: ../../../
:mrdocs:

Set the port

== Synopsis

Declared in `<https://www.github.com/boostorg/url/blob/develop/include/boost/url/static_url.hpp#L396[boost/url/static_url.hpp]>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:boost/urls/static_url.adoc[static_url]&
set_port(core::string_view s);
----

== Description

This port is set to the string, which must contain only digits or be empty. An empty port string is distinct from having no port.

== Example
[,cpp]
----
assert( url( "http://www.example.com" ).set_port( "8080" ).authority().buffer() == "www.example.com:8080" );
----
== Postconditions
[,cpp]
----
this->has_port() == true && this->port_number() == n && this->port() == std::to_string(n)
----
== Exception Safety
Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.

== BNF
[,cpp]
----
port          = *DIGIT
----
== Specification
* https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.3[]

== Return Value

`*this`

== Parameters

[cols=2]
|===
| Name
| Description
| *s*
| The port string to set.
|===

== See Also

xref:boost/urls/static_url/remove_port.adoc[`remove_port`], xref:boost/urls/static_url/set_port.adoc[`set_port`].


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