Re: [Boost-users] [multiindex] key extractor as free function - how?

Joaquín Mª López Muñoz writes:

[solution]

Unfortunately your solution does not work for tuples. The following code fails with a 10-page error message with gcc: #include #include #include #include namespace bm = ::boost::multi_index; template <int I> struct tuple_t_extractor { typedef std::string const & result_type; template <typename Tuple> result_type operator()(Tuple const & t) const { return boost::get<I>(t); // return t.get<I>(); // fails, too } }; class C { typedef boost::tuple data_t; typedef bm::multi_index_container , bm::ordered_unique > > > storage_t; storage_t storage_; }; int main() { C c; }