c++ - Template meta programming inside template class -

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i'm trying pre create template member functions in array, , index array using run time determined values. array array of pointers template functions within manager specialize. call 1 of these functions process::send function. example. 

template<typename matcht> class manager {      public:      template <int p>     void do();       template<int p, int ...ps>      struct table : table<p-1, p-1, ps... >{};       template<int... ps>      struct table <0, ps...>      {           static constexpr void(*fns[])()={do<ps>...};      };   };     template <typename matcht>    template<int... ps>    constexpr void(*manager<matcht>::table<0,ps...>::fns[sizeof...(ps)])();   //process.h   #include "manager.h"  template<typename matcht> class process {    public:     void send(manager<matcht>& mgr  );     private:      typename manager<matcht>::template table<5> _processtable; };   //process.c   template<typename matcht>  void process<matcht>::send(manager<matcht>& mgr)  {      error here:      mgr.*_processtable::fns[1]();   }

error " _processtable not class, namespace , or enumeration".


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