title: Understanding reference binding
body: <p>We can't bind non-const lvalue reference to an rvalue, but it can be bound to the const one. We can't bind rvalue reference to an lvalue also. Actually the Standard say so:</p>
  
  <p>8.5.3/5.2:</p>
  
  <blockquote>
    <p>the reference shall be an lvalue reference to a non-volatile const
    type (i.e., cv1 shall be const), or the reference shall be an rvalue reference.</p>
  </blockquote>
  
  <p>But is there a better explanation for the things than "The Standard say so"?</p>