[#9AD6406FF4EAA95725C1EA110E914F0306FEA4F0]

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        <h2>Function <a href="#">params_view</a>::
params_view</h2>
        <p><span>Constructor</span></p>


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    <div>
        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
        </div>
        <pre class="source-code cpp">
            params_view(core::string_view s);
        </pre>
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    <div>
        <h3>Description</h3>
        <p><span>This function constructs params from</span> <span>a valid query parameter string, which</span>
<span>can contain percent escapes. Unlike</span>
<span>the parameters in URLs, the string</span>
<span>passed here should not start with "?".</span>
<span>Upon construction, the view references</span>
<span>the character buffer pointed to by `s`.</span>
<span>The caller is responsible for ensuring</span>
<span>that the lifetime of the buffer extends</span>
<span>until it is no longer referenced.</span></p>

<h3>Example</h3>
<code>
params_view qp( "first=John&last=Doe" );
</code>
<h3>Effects</h3>
<code>
return parse_query( s ).value();
</code>
<h3>Postconditions</h3>
<code>
this->buffer().data() == s.data()
</code>
<h3>Complexity</h3>
<p><span>Linear in `s`.</span></p>

<h3>Exception Safety</h3>
<p><span>Exceptions thrown on invalid input.</span></p>

<h3>BNF</h3>
<code>
query-params    = [ query-param ] *( "&" query-param )

query-param     = key [ "=" value ]
</code>
<h3>Specification</h3>
<li><a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.4">3.4.  Query</a></li>

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