[clad] Power can take arguments of different types.

Author: vgvassilev

math/mathcore/inc/Math/CladDerivator.h

@@ -191,8 +191,8 @@ void Min_pullback(T a, T b, U p, clad::array_ref<T> d_a, clad::array_ref<T> d_b)
       *d_b += p;
 }
 
-template <typename T>
-ValueAndPushforward<T, T> Power_pushforward(T x, T y, T d_x, T d_y)
+template <typename T, typename U>
+ValueAndPushforward<T, T> Power_pushforward(T x, U y, T d_x, U d_y)
 {
    T pushforward = y * ::TMath::Power(x, y - 1) * d_x;
    if (d_y) {
@@ -201,8 +201,8 @@ ValueAndPushforward<T, T> Power_pushforward(T x, T y, T d_x, T d_y)
    return {::TMath::Power(x, y), pushforward};
 }
 
-template <typename T, typename U>
-void Power_pullback(T x, T y, U p, clad::array_ref<T> d_x, clad::array_ref<T> d_y)
+template <typename T, typename U, typename V>
+void Power_pullback(T x, U y, V p, clad::array_ref<T> d_x, clad::array_ref<U> d_y)
 {
    auto t = pow_pushforward(x, y, 1, 0);
    *d_x += t.pushforward * p;