#include <iostream>
#include <chrono>
using namespace std;
 
template<class T>
struct C {
	T t_;
	C() {}
	template<class U> C(const C<U>&) {}
	template<typename T2> constexpr explicit C(const T2& t) : t_(t) { cout << (const void*)&t << endl; }
};
 
using Z = chrono::milliseconds;
using S = C<long>;
 
void foo(Z) {}
void bar(S s) { cout << s.t_ << endl; }
 
struct A {
	static const unsigned t1 = 123;
};
int main() {
	foo(Z(A::t1));
	bar(S(A::t1));
}
 

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