title: Mixing extern and const
body: <p>Can I mix extern and const, as <em>extern const</em>? If yes, does the <em>const</em> qualifier impose it's reign only within the scope it's declared in or should it exactly match the declaration of the translational unit it's declared in? I.e. can I declare say <code>extern const int i;</code> even when the actual <em>i</em> is not a const and vice versa?</p>