#include <iostream>
using namespace std;
 
class Outer {
	struct Inner {
		int num;	
	};
 
public:
 static Inner GetInner() {
	return Inner{-101};
}
};
 
// void func1(Outer::Inner inner) {  // [1] Does not compile as expected
//	cout << inner.num <<endl;
//}
 
template <typename Dummy>
void func2(Outer::Inner inner, Dummy = Dummy()) {
	cout << inner.num << endl;
}
 
 
int main() {
	// func1(Outer::GetInner()); // [2] does not compile as expected 
	func2<int>(Outer::GetInner()); // [3] How does this compile? 
								   // Outer::Inner should not be accessible
								   // from outside Outer
	return 0;
}

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