l">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class="special">&amp;</span> d<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><span class="keyword">bool</span> <a name="id-1_3_12_15_3_20_1_1_1_7_8-bb"></a><span class="keyword">operator</span><span class="special">&lt;=</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">date_type</span> <span class