[Boost-users] Multi Index: Nested std::pair

Subject: [Boost-users] Multi Index: Nested std::pair
From: Etienne Philip Pretorius (icewolfhunter_at_[hidden])
Date: 2009-04-26 09:11:12

Hello List,

I would greatly appreciate if someone could assist me in getting this 
structure correct.

     boost::multi_index_container<
         std::list<
             std::pair<
                 /*value*/
                 unsigned char,
                 std::pair<
                     /*x co-ordinate*/
                     unsigned char,
                     /*y co-ordinate*/
                     unsigned char
                 >
             >
         >,
         boost::multi_index::indexed_by<
             /*value*/
             boost::multi_index::ordered_non_unique<
                 boost::multi_index::identity<unsigned char>
             >,
             /*x co-ordinate*/
             boost::multi_index::ordered_non_unique<
                 boost::multi_index::identity<unsigned char>
             >,
             /*y co-ordinate*/
             boost::multi_index::ordered_non_unique<
                 boost::multi_index::identity<unsigned char>
             >
         >
     > m;

I do not see how "boost::multi_index::ordered_non_unique" will index the 
appropriate field in the nested std::pair structures. This is why I 
suspect there to be a problem with this structure.

So before I continue, could someone please tell me if I am on the 
correct path.

Grateful,
Etienne