Hey Everyone, I am basically trying to create a sorted hash map using boost multiindex. I am following the examples but I am unable to insert my object into the container when I use a non-primitive key. Is it possible to use a non-primitive key? Any help or pointers would be appreciated. Thanks J.O. #include <inttypes.h> #include <boost/multi_index_container.hpp> #include <boost/multi_index/hashed_index.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/identity.hpp> #include <boost/multi_index/member.hpp> using namespace ::boost; using namespace ::boost::multi_index; #include <iostream> struct Key { uint32_t k1; uint32_t k2; Key(uint32_t k1, uint32_t k2) : k1(k1), k2(k2) {} bool operator==(const Key &key) const { if (k1 != key.k1) return false; if (k2 != key.k2) return false; return true; } }; struct KeyEqual { bool operator()(const Key &key1, Key &key2) const { return key1 == key2; } }; struct KeyHash { std::size_t operator()(const Key& key)const { return boost::hash<uint32_t>()(key.k1) + boost::hash<uint32_t>()(key.k2); } }; struct Data { Key key; int value; Data(const Key& key, int value): key(key), value(value) {} bool operator<(const Data& data)const { return (value < data.value); } }; typedef multi_index_container< Data, indexed_by< // sort by Data::operator< ordered_unique<identity<Data> >, // hashed on key hashed_unique<member<Data,Key,&Data::key> >

DataSet;

typedef DataSet::nth_index<1>::type HashIndex; int main() { DataSet dataSet; HashIndex &hashIndex = dataSet.get<1>(); Key newKey(1,2); Data newData(newKey,3); dataSet.insert(newData); // *** Error - See below *** // find an Data by key Data data=*(hashIndex.find(newKey,KeyHash(),KeyEqual())); }; This is the error I get: g++ -I../include -rdynamic -DCOREDUMP -DLINUX -pthread -pipe -Wall -W -g -DDEBUG -c mIndex.cc -o mIndex.o mIndex.cc: In member function ‘size_t boost::hash<T>::operator()(const T&) const [with T = Key]’: /usr/include/boost/multi_index/hashed_index.hpp:957: instantiated from ‘void boost::multi_index::detail::hashed_index<KeyFromValue, Hash, Pred, SuperMeta, TagList, Category>::unchecked_rehash(size_t) [with KeyFromValue = boost::multi_index::member<Data, Key, &Data::key>, Hash = boost::hash<Key>, Pred = std::equal_to<Key>, SuperMeta = boost::multi_index::detail::nth_layer<2, Data, boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<Data> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::hashed_unique_tag]’ /usr/include/boost/multi_index/hashed_index.hpp:942: instantiated from ‘void boost::multi_index::detail::hashed_index<KeyFromValue, Hash, Pred, SuperMeta, TagList, Category>::reserve(size_t) [with KeyFromValue = boost::multi_index::member<Data, Key, &Data::key>, Hash = boost::hash<Key>, Pred = std::equal_to<Key>, SuperMeta = boost::multi_index::detail::nth_layer<2, Data, boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<Data> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::hashed_unique_tag]’ /usr/include/boost/multi_index/hashed_index.hpp:629: instantiated from ‘boost::multi_index::detail::hashed_index_node<typename SuperMeta::type::node_type>* boost::multi_index::detail::hashed_index<KeyFromValue, Hash, Pred, SuperMeta, TagList, Category>::insert_(typename boost::call_traits<typename boost::multi_index::detail::hashed_index_node<typename SuperMeta::type::node_type>::value_type>::param_type, boost::multi_index::detail::hashed_index_node<typename SuperMeta::type::node_type>*) [with KeyFromValue = boost::multi_index::member<Data, Key, &Data::key>, Hash = boost::hash<Key>, Pred = std::equal_to<Key>, SuperMeta = boost::multi_index::detail::nth_layer<2, Data, boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<Data> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::hashed_unique_tag]’ /usr/include/boost/multi_index/ordered_index.hpp:556: instantiated from ‘boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>* boost::multi_index::detail::ordered_index<KeyFromValue, Compare, SuperMeta, TagList, Category>::insert_(typename boost::call_traits<typename boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>::value_type>::param_type, boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>*) [with KeyFromValue = boost::multi_index::identity<Data>, Compare = std::less<Data>, SuperMeta = boost::multi_index::detail::nth_layer<1, Data, boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<Data> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::ordered_unique_tag]’ /usr/include/boost/multi_index_container.hpp:465: instantiated from ‘std::pair<typename boost::multi_index::detail::multi_index_base_type<Value, IndexSpecifierList, Allocator>::type::node_type*, bool> boost::multi_index::multi_index_container<Value, IndexSpecifierList, Allocator>::insert_(const Value&) [with Value = Data, IndexSpecifierList = boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, Allocator = std::allocator<Data>]’ /usr/include/boost/multi_index/detail/index_base.hpp:148: instantiated from ‘std::pair<typename boost::multi_index::detail::multi_index_node_type<Value, IndexSpecifierList, Allocator>::type*, bool> boost::multi_index::detail::index_base<Value, IndexSpecifierList, Allocator>::final_insert_(typename boost::call_traits<Value>::param_type) [with Value = Data, IndexSpecifierList = boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, Allocator = std::allocator<Data>]’ /usr/include/boost/multi_index/ordered_index.hpp:252: instantiated from ‘std::pair<boost::multi_index::detail::bidir_node_iterator<boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>, mpl_::na>, bool> boost::multi_index::detail::ordered_index<KeyFromValue, Compare, SuperMeta, TagList, Category>::insert(typename boost::call_traits<typename boost::multi_index::detail::ordered_index_node<typename SuperMeta::type::node_type>::value_type>::param_type) [with KeyFromValue = boost::multi_index::identity<Data>, Compare = std::less<Data>, SuperMeta = boost::multi_index::detail::nth_layer<1, Data, boost::multi_index::indexed_by<boost::multi_index::ordered_unique<boost::multi_index::identity<Data>, mpl_::na, mpl_::na>, boost::multi_index::hashed_unique<boost::multi_index::member<Data, Key, &Data::key>, mpl_::na, mpl_::na, mpl_::na>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na>, std::allocator<Data> >, TagList = boost::mpl::vector0<mpl_::na>, Category = boost::multi_index::detail::ordered_unique_tag]’ mIndex.cc:94: instantiated from here mIndex.cc:79: error: ‘struct hash_value’ is not a function, /usr/include/boost/functional/hash/hash.hpp:290: error: conflict with ‘template<class K, class T, class C, class A> size_t boost::hash_value(const std::multimap<K, T, C, A>&)’ /usr/include/boost/functional/hash/hash.hpp:487: error: in call to ‘hash_value’ /usr/include/boost/functional/hash/hash.hpp:487: error: no matching function for call to ‘hash_value(const Key&)’ /usr/include/boost/functional/hash/hash.hpp:105: note: candidates are: size_t boost::hash_value(int) /usr/include/boost/functional/hash/hash.hpp:110: note: size_t boost::hash_value(unsigned int) /usr/include/boost/functional/hash/hash.hpp:115: note: size_t boost::hash_value(long int) /usr/include/boost/functional/hash/hash.hpp:120: note: size_t boost::hash_value(long unsigned int) /usr/include/boost/functional/hash/hash.hpp:229: note: size_t boost::hash_value(float) /usr/include/boost/functional/hash/hash.hpp:234: note: size_t boost::hash_value(double) /usr/include/boost/functional/hash/hash.hpp:239: note: size_t boost::hash_value(long double) make: *** [mIndex.o] Error 1