title: C++11 regex details
body: <p>Where can I find details about the new C++11, and in particular (at the moment) the <code>regex</code> library?<br>
  By details I don't mean how to use, as there seem to be many tutorials out there about that, but rather what exceptions can be thrown and what causes them, which regex syntax is more efficient in what cases, etc.</p>
  
  <p>Answers should include a link, please, not just "Read the spec"!</p>