constexpr node-handle(node-handle&& nh) noexcept;

Effects: Constructs a node-handle object initializing ptr_ with nh.ptr_.

Move constructs alloc_ with nh.alloc_.

Assigns nullptr to nh.ptr_ and assigns nullopt to nh.alloc_.

constexpr node-handle& operator=(node-handle&& nh);

Preconditions: Either !alloc_ is true, or ator-traits​::​propagate_on_container_move_assignment​::​value is true, or alloc_ == nh.alloc_ is true.

Effects:

• If ptr_ != nullptr is true, destroys the value_type subobject in the container-node-type object pointed to by ptr_ by calling ator-traits​::​destroy, then deallocates ptr_ by calling ator-traits​::​template rebind_traits<container-node-type>​::​deallocate.

• If !alloc_ is true or ator-traits​::​propagate_on_container_move_assignment​::​value is true, move assigns nh.alloc_ to alloc_.

• Assigns nullptr to nh.ptr_ and assigns nullopt to nh.alloc_.