"special">;</span></pre>
<p><code class="computeroutput">add</code> inserts <code class="computeroutput">value_pair</code> into the map if it's key does not exist in the map. If <code class="computeroutput">value_pairs's</code> key value exists in the map, it's data value is added to the data value already found in the map. </p>
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<pre class="literallayout"><span class="identifier">iterator</span> <a name="idp41728720-bb"></a><span class="identifier">add</span><span class="special"