C++14 Universal `make` function

general_make.cpp

#include<type_traits>
#include<iostream>

template<typename T1, typename T2>
class Moo
{
  T1 t1;
  T2 t2;

  public:

  constexpr Moo(T1 t1_, T2 t2_) :
    t1(t1_),
    t2(t2_)
  {}

  void print() const
  {
    std::cout << t1;
    std::cout << "\n";
    std::cout << t2;
    std::cout << "\n";
  }
};

template<template<class...> class T>
struct make
{
  template<typename... X>
  constexpr auto operator()(X... x)
  {
    return T<std::decay_t<decltype(x)>...>
      (std::forward<decltype(x)>(x)...);
  }
};

auto make_moo = make<Moo>{};

int main()
{
  make_moo("Hello", 5).print();
  constexpr auto moo = make_moo("Hello", "World");
  moo.print();
  //non constexpr
  int x = 5;
  auto moo2 = make_moo("Hello", x);
  moo2.print();
}