"><a class="link" href="map.html" title="Class template map">map</a></code>. If <code class="computeroutput">value_pairs's</code> key value exists in the <code class="computeroutput"><a class="link" href="map.html" title="Class template map">map</a></code>, it's data value is added to the data value already found in the <code class="computeroutput"><a class="link" href="map.html" title="Class template map">map</a></code>. </p>
</li>
<li>
<pre class="literallayout"><span class="identifier">iterator</span> <a