Hi! I have this class that extends the boost::multi_index: #include <boost/multi_index_container.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/random_access_index.hpp> using namespace boost::multi_index; template<typename K,typename V> struct mutable_pair { typedef K first_type; typedef V second_type; mutable_pair():first(K()),second(V()){} mutable_pair(const K& f,const V&s):first(f),second(s){} mutable_pair(const std::pair<K,V>& p):first(p.first),second(p.second){} K first; mutable V second; }; template<typename K,typename V> class Ordered_Map : public multi_index_container< mutable_pair<K, V>, indexed_by< random_access<>, ordered_unique<member<mutable_pair<K,V>, K, &mutable_pair<K, V>::first> > > > { public: V& operator[]( const K& key ) { //here I have error on end() (but no error on insert()) and on get<>(). end() insert() and get<>() should be methods of superclass.This code work well on MSVC 2010 insert(end(), mutable_pair<K, V>(key,V())); //error on end() on GCC return get<1>().find(key)->second; //error on get<>() on GCC } }; int main() { Ordered_Map<std::string,int> myMap; myMap["Joe"] = 3; myMap["Lillo"] = 9; myMap["Mary"] = -3; for (auto i = myMap.cbegin(); i != myMap.cend(); ++i) std::cout << i->first << " - " << i->second << std::endl; std::cin.get(); return 0; } This code work well on MSVC 2010 but I have various compiler error on GCC 4.6.1 (Ubuntu 11.10). Why? -- View this message in context: http://old.nabble.com/Problem-extending-boost%3A%3Amulti_index-on-GCC-4.6-tp32924615p32924615.html Sent from the gcc - Help mailing list archive at Nabble.com.