polybox.hpp

template<class T>
struct PolyBox {
  typedef std::unique_ptr<T> Ptr;

  /* Regular constructor */
  PolyBox(Ptr&& p): ptr(std::move(p)) {}

  /* Copy */
  PolyBox(const PolyBox& t) : ptr(Ptr(t.ptr->clone())) {}
  PolyBox& operator=(const PolyBox& t) {
    ptr = Ptr(t.ptr->clone());
    return *this;
  }

  /* Move */
  PolyBox(PolyBox&& t) : ptr(std::move(t.ptr)) {}
  PolyBox& operator=(PolyBox&& t) {
    ptr = std::move(t.ptr);
    return *this;
  }

  T& inner() {
    return *ptr;
  }

private:
  Ptr ptr;
};