Method base_func

exprtk_test.cpp:5863–5863

   typedef const T& type;
   base_func(const std::size_t& n) : exprtk::ifunction<T>(n) {}
   inline T operator()(type v0, type v1, type v2, type v3, type v4) exprtk_test_override { return (v0 + v1 + v2 + v3 + v4); }
   inline T operator()(type v0, type v1, type v2, type v3) exprtk_test_override { return (v0 + v1 + v2 + v3); }
   inline T operator()(type v0, type v1, type v2) exprtk_test_override { return (v0 + v1 + v2); }