Comment by thebear

Author here. A few years back, I wrote an article about the issues that you're asking about. Since the article still comes up as the #1 result of Google search for "C++ rvalue references", I believe it's ok for me to recommend it here:

http://thbecker.net/articles/rvalue_references/section_01.ht...

Warning: Read only if you have a serious interest in C++.