templates - Constructing c++ parameter pack from vector -

although final use case different, want solve prolem:

// assumption: length of fields same of vector. template<typename... fields> void increment(const string &name, const std::vector<string> &fields) {  // *** how implement function can call like: // specializedcounter<typeof(fields)...> counter = new counter<typeof(fields)>(); // counter->increment(name, field_pack);  }  template <typename... fields> class specializedcounter : public counter<fields...> {    // public counter provides generalized interface how increment counters.   void increment(const string &name, const fields... &fields) {       // know how implement this.   }  }; 

the crux of question is, how transform list/vector or matter iterable type parameter pack. happy if question dup! :)