C++ quiz. Having an assignment of one struct type variable t

Having an assignment of one struct type variable to another, will the code compile?

template <class T>
struct S { };

struct A { };
struct B : A { };

void Test() {
  S<A> a;
  S<B> b;
  a = b;
}

Explanation

No, since S<B> doesn't inherit S<A>, so compiler can't automatically generate a copy assignment operator.

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