In a few instances the implicit definition of a defaulted copy constructor and copy assignment operator is deprecated in C++11.  E.g.:
struct A
{
  // A(const A&) = default;  // deprecated
  // A& operator=(const A&) = default;  // deprecated
  ~A();
};
Should we warn when both -std=c++11 and -Wdeprecated is given?
Howard