n><span class="special">&lt;</span> <a class="link" href="map.html#boost.icl.map.type">type</a><span class="special">,</span> <span class="identifier">codomain_combine</span><span class="special">,</span> <span class="identifier">Traits</span><span class="special">::</span><span class="identifier">absorbs_identities</span> <span class="special">&gt;</span>                                              <a name="boost.icl.map.on_identity_absorbtion"></a><span class="identifier">on_identity_absorbtion</span><sp