title: Should we be using CGFloat for all floating point numbers in Swift?
body: <p>After watching a lot of the WWDC videos and reading through the Swift iBook, I came away with the impression that <code>CGFloat</code> was somewhat... legacy, due to the emphasis on <code>Int</code> and <code>Double/Float</code>. Perhaps somewhat comparable to <code>NSString</code> vs <code>String</code>.</p>
  
  <p>I wrote a bit of code with the latter, and <code>Double</code> won't compile on non-64 bit devices. <code>Int</code> seems fine, though.</p>
  
  <p>Should we still be using <code>CGFloat</code> for all math? Has anyone found anything that would indicate we'd be able to use the native Swift numerics? Because right now they're essentially unusable outside of scripts.</p>