an class="identifier">boost</span><span class="special">::</span><span class="identifier">call_traits</span><span class="special">&lt;</span> <span class="identifier">DomainT</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">param_type</span>                                                                        <a name="boost.icl.map.domain_param"></a><span class="identifier">domain_param</span><span class="special">;</span>              
  <span class="keyword