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        <h2>Function <a href="#">url_base</a>::
set_port_number</h2>
        <p><span>Set the port</span></p>


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        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
        </div>
        <pre class="source-code cpp">
            url_base&
set_port_number(std::uint16_t n);
        </pre>
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        <h3>Description</h3>
        <p><span>The port is set to the specified integer.</span></p>

<h3>Example</h3>
<code>
assert( url( "http://www.example.com" ).set_port_number( 8080 ).authority().buffer() == "www.example.com:8080" );
</code>
<h3>Postconditions</h3>
<code>
this->has_authority() == true && this->has_port() == true && this->port_number() == n
</code>
<h3>Complexity</h3>
<p><span>Linear in `this->size()`.</span></p>

<h3>Exception Safety</h3>
<p><span>Strong guarantee.</span>
<span>Calls to allocate may throw.</span></p>

<h3>BNF</h3>
<code>
authority     = [ userinfo "@" ] host [ ":" port ]

port          = *DIGIT
</code>
<h3>Specification</h3>
<li><a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.3">            3.2.3. Port (rfc3986)</a></li>

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