title: Better name for CHAR_BIT?
body: <p>I was just <a href="https://stackoverflow.com/questions/2686542/converting-integer-to-a-bit-representation/2687562#2687562">checking an answer</a> and realized that <code>CHAR_BIT</code> isn't defined by headers as I'd expect, not even by <code>#include &lt;bitset&gt;</code>, on newer GCC.</p>
  
  <p>Do I really have to <code>#include &lt;climits&gt;</code> just to get the "functionality" of <code>CHAR_BIT</code>?</p>