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

Why can't you just copy the BigClass object?

void foo(const BigClass& big) {
  while (...) {
    T t{ BigClass(big) };
    ...
  }
}

This makes a temporary BigClass that is then moved into the T