title: Is _1 part of C++0x?
body: <p>I've seen <a href="https://stackoverflow.com/questions/4008369">two</a> recent <a href="https://stackoverflow.com/questions/4009530">answers</a> using <code>_1</code> as a pure C++0x solution (no explicit mention of boost lambdas).</p>
  
  <p>Is there such an animal as <code>std::_1</code> I would think that having native lambdas will make such a construct redundant.</p>
  
  <p>A Google code search for <code>std::_1</code> brings <a href="http://www.google.com/codesearch?q=std%3A%3A_1&amp;hl=en" rel="nofollow noreferrer">two results</a> from the same project so that's inconclusive.</p>