#include <initializer_list>
#include <string>

using namespace std;

class A {
public:
	A(initializer_list<int> l) { // I
	}

	A(double d, string s, initializer_list<int> l) { // II
	}

	A(int x, int y) { // III
	}
	
};

main() {
	A a{3,4}, b(4,5); // a constructed from I, b from III
	A c{3.4,"hello",{1,2,3}}; // c from II (nested braces necessary)
	
	// STL uses them:
	vector<int> x {1,2,3}; // x is 1,2,3
	x.insert(x.end(),{4,5,6}); // x is now 1,2,3,4,5,6
	x = {10,11,12}; // x is now 10,11,12
}