title: Variables declared by &&
body: <p>Thinking about (x|r|l|pr|gl)values, the following question came to my mind:</p>
  
  <p>Consider the following two variable declarations:</p>
  
  <pre><code>X x = ...;
  </code></pre>
  
  <p>and</p>
  
  <pre><code>X&amp;&amp; x = ...;
  </code></pre>
  
  <p>and assume the <code>...</code> do <em>not</em> deliver an xvalue.</p>
  
  <p>Can anybody think of code <em>not</em> using <code>decltype</code> in which this makes a difference? In both cases, <code>(x)</code> will by an lvalue of type <code>X</code>, won't it?</p>