pointer_traits::pointer_to 메서드
Static method that returns Ptr::pointer_to(obj), if that function exists. Otherwise, it is not possible to convert an arbitrary reference to an object of class Ptr. If Ptr is a raw pointer, this method returns addressof(obj).
static pointer pointer_to(element_type& obj);
요구 사항
헤더 <memory>
네임스페이스: std