#include <iostream>

class A
{
  public:

  void print() &
  {
    std::cout << "lvalue!" << "\n";
  }

  void print() const&
  {
    std::cout << "const lvalue!" << "\n";
  }

  void print() &&
  {
    std::cout << "rvalue!" << "\n";
  }
};

int main()
{
  A lvalue {};
  lvalue.print();
  A().print();

  const A& constLvalue = lvalue;

  constLvalue.print();
  return 0;
}