[#48B89671AEA050699387EAFF05B538D0DAC8096F]

<div id="48B89671AEA050699387EAFF05B538D0DAC8096F">
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        <h2>Function <a href="#">url_view_base</a>::
has_query</h2>
        <p><span>Return true if a query is present</span></p>


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    <div>
        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
        </div>
        <pre class="source-code cpp">
            bool
has_query() const noexcept;
        </pre>
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        <h3>Description</h3>
        <p><span>This function returns true if this</span> <span>contains a query. An empty query is</span>
<span>distinct from having no query.</span></p>

<h3>Example</h3>
<code>
assert( url_view( "/sql?id=42&col=name&page-size=20" ).has_query() );
</code>
<h3>Complexity</h3>
<p><span>Constant.</span></p>

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

<h3>BNF</h3>
<code>
query           = *( pchar / "/" / "?" )

query-param     = key [ "=" value ]
query-params    = [ query-param ] *( "&" query-param )
</code>
<h3>Specification</h3>
<li><a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.4
            >3.4.  Query (rfc3986)</a>
        @li <a href=">://en.wikipedia.org/wiki/Query_string"            >Query string (Wikipedia)</a></li>

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