std::unique_ptr<int> p = std::unique_ptr<int, std::default_delete<int> >{new int{1}};

std::operator<<(std::cout.operator<<(p.operator*()), '\n');

std::unique_ptr<int[]> a = std::unique_ptr<int[], std::default_delete<int[]> >{new int[2]};

a.operator[](0) = 10;

a.operator[](1) = 20;

std::operator<<(std::cout.operator<<(a.operator[](i)), '\n');