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#include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/sequenced_index.hpp> #include <boost/multi_index/key_extractors.hpp> using namespace boost::multi_index; typedef multi_index_container< std::string, indexed_by< sequenced<>, ordered_non_unique<identity<std::string> > > > text;