[#28BF05DCA631CB3A42D5EE9FAA8272DC1F081E1C]

<div id="28BF05DCA631CB3A42D5EE9FAA8272DC1F081E1C">
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        <h2>Function <a href="#">url_view_base</a>::
host_ipv4_address</h2>
        <p><span>Return the host IPv4 address</span></p>


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    <div>
        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
        </div>
        <pre class="source-code cpp">
            ipv4_address
host_ipv4_address() const noexcept;
        </pre>
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    <div>
        <h3>Description</h3>
        <p><span>If the host type is</span> <span>host_type::ipv4</span> <span>,        this function returns the address as</span>
<span>a value of type</span>
<span>ipv4_address</span>
<span>.        Otherwise, if the host type is not an IPv4</span>
<span>address, it returns a default-constructed</span>
<span>value which is equal to the unspecified</span>
<span>address "0.0.0.0".</span></p>

<h3>Example</h3>
<code>
assert( url_view( "http://127.0.0.1/index.htm?user=win95" ).host_ipv4_address() == ipv4_address( "127.0.0.1" ) );
</code>
<h3>Complexity</h3>
<p><span>Constant.</span></p>

<h3>Exception Safety</h3>
<p><span>Throws nothing.</span></p>

<h3>BNF</h3>
<code>
IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet

dec-octet   = DIGIT                 ; 0-9
            / %x31-39 DIGIT         ; 10-99
            / "1" 2DIGIT            ; 100-199
            / "2" %x30-34 DIGIT     ; 200-249
            / "25" %x30-35          ; 250-255
</code>
<h3>Specification</h3>
<li><a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2">3.2.2. Host (rfc3986)</a></li>

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