#include <iostream>
#include <vector>

const std::vector<int> getvec(){
	return {1, 2, 3};
}


int main() {
	std::vector<int> foo{ 11, 12 };
	[&](const auto &bar){ foo.insert(foo.end(), bar.begin(), bar.end()); }(getvec());
	for(int num : foo) {
		std::cout << num << std::endl;
	}
	return 0;
}