title: Swift arrays identity "Type does not conform to protocol 'AnyObject'" error
body: <p>I create playground and write this code:</p>
  
  <pre><code>var a = [1, 2, 3]
  var b = a
  
  a === b
  </code></pre>
  
  <p>And playground gives me error <code>Type '[Int]' does not conform to protocol 'AnyObject'</code>.</p>
  
  <p>What am I doing wrong?</p>
  
  <p>I'm using XCode 6 GM Seed.</p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>This code was taken from "The Swift Programming Language" book that states:</p>
  
  <pre><code>“Check whether two arrays or subarrays share the same storage and elements by comparing them with the identity operators (=== and !==).”
  </code></pre>
  
  <p>in "Classes and Structures" chapter.</p>
  
  <p><strong>UPDATE 2</strong>
  The excerpt was from old version of book for early Swift specification. I downloaded the fresh one and there is no such words. So identity operators can be applied only to class instances. </p>