[#8F1511298552609A31662B813A78437A70ACD6B0]

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        <h2>Function <a href="#">params_ref</a>::
unset</h2>
        <p><span>Remove the value on an element</span></p>


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    <div>
        <h3>Synopsis</h3>
        <div>
            <code>
                            </code>
        </div>
        <pre class="source-code cpp">
            iterator
unset(iterator pos) noexcept;
        </pre>
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        <h3>Description</h3>
        <p><span>This function removes the value of</span> <span>an element at the specified position.</span>
<span>After the call returns, `has_value`</span>
<span>for the element is false.</span></p>

<p><span></span>
<span>All iterators that are equal to</span>
<span>`pos` or come after are invalidated.</span></p>

<h3>Example</h3>
<code>
url u( "?first=John&last=Doe" );

u.params().unset( u.params().begin() );

assert( u.encoded_query() == "first&last=Doe" );
</code>
<h3>Complexity</h3>
<p><span>Linear in `this->url().encoded_query().size()`.</span></p>

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


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