Function dual to std::move?

Question

Let\'s assume I have a class with only one constructor:

class T {
 public:
  T(BigClass&& big) : big(std::move(big)) {}
  ...

  SomeBigClass
};
         


        

Answer 1

It's not hard to write:

template 
T make_temp(const T& x) { return x; }

There might be a standard function that happens to do that by accident when called with one argument, but there isn't one designed for this unusual pattern.