Function operator()

exprtk_test.cpp:3741–3744

   myfunc() : exprtk::ifunction<T>(2) {}

   inline T operator()(const T& v1, const T& v2)
   {
      return T(1) + (v1 * v2) / T(3);
   }
};

#define define_free_functions(N,Type)                                                                          \