Are rvalues always constant?
<p>When <code>int i = 5;</code></p>

<pre><code>int j = i;
</code></pre>

<p>Will rvalue <code>i</code> in this expression be a constant when evaluating the result?</p>

<p>I'm asking this question because in my copy constructor its argument requires a <code>const</code></p>
