[Edited] For anyone like me stuck on his language: the phrase "move from" should be understood as a technical term loosely related to the English language meaning of the words. I think the post would be better if he explained this terminology; as it is you have to know an awful lot about the topic he is writing about to even parse what he is saying.

There is a pretty good stack overflow post that quuxplusone linked below. How they explain it:

  Moving from lvalues

  Sometimes, we want to move from lvalues. That is, sometimes we want the compiler to treat an lvalue as if it were an rvalue, so it can invoke the move constructor, even though it could be potentially unsafe. For this purpose, C++11 offers a standard library function template called std::move inside the header <utility>. This name is a bit unfortunate, because std::move simply casts an lvalue to an rvalue; it does not move anything by itself. It merely enables moving. Maybe it should have been named std::cast_to_rvalue or std::enable_move, but we are stuck with the name by now.