template map">map</a></code>. Erase only if, the exact value content <code class="computeroutput">val</code> is stored for the given key. </p>
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<pre class="literallayout"><span class="keyword">void</span> <a name="id673441-bb"></a><span class="identifier">add_intersection</span><span class="special">(</span><a class="link" href="map.html" title="Class template map">map</a> <span class="special">&amp;</span> section<span class="special">,</span> <span class="keyword">const</span> <span class="ident