Hello, I have managed to remove the template parameters and get all the tests compiling and running [0]. Also, I have fixed the begin, end, rbegin(), rend() functions from trie_set / trie_multiset [1] and I have used std::ref in operator* only when the compiler supports rvalue references[2]. The solution with make_pair<vector<key_type>, Value&> works only on non C++11 compilers, because on C++11 reference is removed from the return_type of make_pair in C++11. Please review the code if you have time and tell me what should I do next. I think a move constructor for C++11 compilers would be a nice addition. [0] https://github.com/cosminBoaca/boost.trie/commit/f9e0800c8dcc73a615e73a87175... [1] https://github.com/cosminBoaca/boost.trie/commit/a3eeae277470788cbec6ccba2aa... [2] https://github.com/cosminBoaca/boost.trie/commit/1bfda5490e18e3bcd51ec86883a... Thank you, Cosmin