Hello Tal, ----- Mensaje original ----- De: Tal Agmon <tal.boost@gmail.com> Fecha: Domingo, Agosto 20, 2006 6:20 pm Asunto: [boost] [multi-index] key_value
Hi,
I am happy to work with multi_index library up till now I am able to operate successfully a 5 indices with my cranky msvc 6.5 comiler at work.
Remarkable, given the unstability of that old compiler.
I do have a naive question
Is it possible to retreive all key values from an N index_type container? and how can I do it?
I don't understand the question. What do you mean by "key value" and by "an N index_type container"? In case the following is somewhat related to your problem, here's how one can produce the key part of each element of a given key-based index (uncompiled, expect typos.) // multi_index_t is some multi-index container. multi_index_t m; ... // index N-th is key-based (for instance, ordered.) typedef nth_index<multi_index_t,N>::type index_t; const index_t& i=get<N>(m); for(index_t::const_iterator it=i.begin();it!=i.end();++it){ std::cout<<i.key_extractor()(*it)<<std::endl; } This code uses the member function key_extractor(), which returns a copy of the internal key extractor, to extract the key part of a given element. In case your question is not addressed by the snippet above, I'd appreciate if you could explain it a little more clearly, possibly stating what your final goal is. Thank you for using Boost.MultiIndex, Joaquín M López Muñoz Telefónica, Investigación y Desarrollo