Re: [Boost-users] multi_index_container for composite key

Uthpal Urubail escribió:

Joaquín M López Muñoz, Thanks for offering me the help.

You're welcome. Please don't top-post and try to follow the general discussion policies outlined at http://www.boost.org/community/policy.html

One interesting observation: If I use the below in finding the objects it is not retrieving properly indexed_by< ordered_unique< /// INSTEAD if I use ordered_non_unique< it works fine composite_key<

If you use ordered_unique then there cannot be two elements with the same node[0], node[1], node[2] values. I guess this is what's happening in your case.

I am still not clear with my question:2 Can I define the container like below? I don't want to create the temporary data structure. I will get these information from a class object. Can I use them directly?? Please help me in understanding.

typedef multi_index_container< , //?? indexed_by< ordered_unique< composite_key< , //??? BookNodeExtractor<0>, BookNodeExtractor<1>, BookNodeExtractor<2> > >, ordered_unique< member > >

...

beambook;

I'm not sure what your question is, but if you wonder whether you can define a container of pointers to Books rather than Book objects proper, the answer is: you can, but you have to modify BookNodeExtractor so that it accepts pointers rather than Book &s. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo