REGISTER_FUNCTION(Order, eval_func(Order_eval).
series_func(Order_series));
-//////////
-// Inert differentiation
-//////////
-
-static ex Diff_eval(const ex & f, const ex & x)
-{
- return Diff(f, x).hold();
-}
-
-static ex Diff_deriv(const ex & f, const ex & x, unsigned deriv_param)
-{
- GINAC_ASSERT(deriv_param == 0 || deriv_param == 1);
- if (deriv_param == 1)
- return Diff(Diff(f, x), x);
- else
- return _ex0();
-}
-
-REGISTER_FUNCTION(Diff, eval_func(Diff_eval).
- derivative_func(Diff_deriv));
-
//////////
// Inert partial differentiation operator
//////////
-static ex Derivative_eval(const ex & f, const ex & n)
+static ex Derivative_eval(const ex & f, const ex & l)
{
- if (is_ex_exactly_of_type(n, numeric) && ex_to_numeric(n).is_nonneg_integer()) {
- unsigned i = ex_to_numeric(n).to_int();
- if (is_ex_exactly_of_type(f, function)) {
- if (i < f.nops() && is_ex_exactly_of_type(f.op(i), symbol))
- return Diff(f, f.op(i));
- }
+ if (!is_ex_exactly_of_type(f, function)) {
+ throw(std::invalid_argument("Derivative(): 1st argument must be a function"));
}
- return Derivative(f, n).hold();
+ if (!is_ex_exactly_of_type(l, lst)) {
+ throw(std::invalid_argument("Derivative(): 2nd argument must be a list"));
+ }
+ return Derivative(f, l).hold();
}
REGISTER_FUNCTION(Derivative, eval_func(Derivative_eval));