ayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="id-1_3_35_5_6_10_1_1_1_3_8_3-bb"></a><span class="keyword">operator</span><span class="special">==</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="param_type.html" title="Class param_type">param_type</a> <span class="special">&amp;</span> lhs<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="param_type.html" title="Class param_type">param_typ