Method swap

include/priority_queue.h:368–371

Swaps the contents of two priority queues.

  /// Swaps the contents of two priority queues.
  void swap(Priority_queue &other) {
    std::swap(static_cast<Base &>(*this), static_cast<Base &>(other));
    m_container.swap(other.m_container);
  }

  /// Returns true if the priority queue has the heap property.
  bool is_valid() const {