<span class="special">&lt;</span> <span class="identifier">key_type</span><span class="special">,</span> <span class="identifier">mapped_type</span><span class="special">,</span> <span class="identifier">key_less</span><span class="special">,</span> <a class="link" href="flat_map_index_aux.html#boost.interprocess.flat_map_index_aux.allocator_type">allocator_type</a> <span class="special">&gt;</span> <a name="boost.interprocess.flat_map_index_aux.index_t"></a><span class="identifier">index_t</span><span clas