title: Is i += ++i undefined behavior in C++0x?
body: <p>I'm very convinced with the explanation I've found that said that <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#637" rel="nofollow"><code>i = ++i</code>  is not undefined</a> as far as C++0x is concerned, but I'm unable to judge whether the behavior of  <code>i += ++i</code> is well-defined or not. Any takers?</p>