Dear all, I am experimenting with MultiIndex, and I am happy with my custom classes. Now I am wondering, can I index integers without a custom class? For instance, say we have a 32 bit unsigned integer, how can I index these with respect to the MSB or LSB? My first guess is using a union, something like union uint32_u { uint32_t data; uint16_t bits[2]; }; // define a multiply indexed set with indices by id and name typedef boost::multi_index::multi_index_container< uint32_u, boost::multi_index::indexed_by< // sort by MSB boost::multi_index::ordered_non_unique<boost::multi_index::member<employee, uint16_t, uint32_u.bits[0]>>, // sort by LSB boost::multi_index::ordered_non_unique<boost::multi_index::member<employee, uint16_t, uint32_u.bits[1]>>, >
integer_set;
But I cannot obviously compile it. Is there a way I can do this? Thanks!