title: xcode - "attempt to use a deleted function" - what does that mean?
body: <p>I am writing a C++ library in Xcode 4.2.</p>
  <p>One of my classes won't compile with this error:</p>
  <blockquote>
  <p>attempt to use a deleted function</p>
  </blockquote>
  <p>There is no specific indication what function it's talking about.
  I don't want to post the class code here, but does anybody have any idea what this error means?</p>