dentifier">add</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&amp;</span> value_pair<span class="special">)</span><span class="special">;</span></pre>
<p><code class="computeroutput">add</code> inserts <code class="computeroutput">value_pair</code> into the <code class="computeroutput"><a class="link" href="map.html" title="Class template map">map</a></code> if it's key does not exist in the <code class="computeroutput