How to make template rvalue reference parameter ONLY bind to rvalue reference?

Question

I\'m writing a network library and use move semantics heavily to handle ownership for file descriptors. One of my class wishes to receive file descriptor wrappers of other k

Answer 1

You can restrict T to not be an lvalue reference, and thus prevent lvalues from binding to it:

#include 

struct OwnershipReceiver
{
  template ::value
            >::type
           >
  void receive_ownership(T&& t)
  {
     // taking file descriptor of t, and clear t
  }
};

It might also be a good idea to add some sort of restriction to T such that it only accepts file descriptor wrappers.