ass="special">(</span><span class="special">)</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">domain_type</span> <span class="special">&amp;</span> key<span class="special">)</span> <span class="keyword">const</span><span class="special">;</span></pre>
<p>Total select function. </p>
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<pre class="literallayout"><a class="link" href="map.html" title="Class template map">map</a> <span class="special">&amp;</span> <a name="id673209-bb"></a><span class="i