[Boost-users] Using subscript operator with interprocess map

Hello, I'm using a map from basic_string to int on managed_mapped_file (boost 1.35.0). Everything works except that I get a compilation error if I use subscript operator. I'm trying something like this: #include #include #include #include namespace bi = boost::interprocess; typedef bi::allocator char_alloc; typedef bi::basic_string char_string; typedef std::pair ValueType; typedef bi::allocator map_alloc; typedef bi::map, map_alloc> MyMap; int main () { bi::managed_mapped_file segment(bi::open_or_create, "/tmp/test", 65536); map_alloc alloc_inst (segment.get_segment_manager()); MyMap *mymap = segment.find_or_construct<MyMap>("MyMap") (std::lessbi::string(), alloc_inst); (*mymap)[char_string("key")] = 1; return 0; } What am I doing wrong? Thanks! --Michi